scholarly journals Analysis of test results under static load conditions of 316L steel

2021 ◽  
Vol 332 ◽  
pp. 01001
Author(s):  
Grzegorz Szala ◽  
Karolina Karolewska ◽  
Mateusz Wirwicki
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
Complex Geometry ◽  
Hardness Test ◽  
Melting Process ◽  
Test Results ◽  
Structural Elements ◽  
Cell Column ◽  
316L Steel ◽  
A Cell

Metal powder 3D printing technology is gaining popularity due to the possibility of producing structural elements of complex geometry, which production with the methods used so far is difficult or impossible to obtain. An example of a material used in the parts production by the additive method is 316L steel, which is used in the production of bone support screws, surgical tools and needles, or in other industries for the production of exhaust manifolds, parts of furnaces or heat exchangers. The study investigated the mechanical properties, hardness and microstructure of 316L steel produced in the selective laser melting process (SLM). Based on the tests, the following mechanical properties of 316L steel were obtained: Su = 566.7MPa, Sp0.2 = 484MPa, E = 113820MPa, A = 79.5%, Z = 72.3%. The hardness test results show a significant increase in hardness as the tensile test approaches the sample fracture. The structure of 316L steel in the grip part is characterized by the formation of visible semi-elliptical zones of the material alloy, the pools with crystallized grains with a cell-column structure oriented in the direction of the thermal gradient. This type of microstructure is characteristic of technology in which, after solidification, the cooling process takes place at high speed.

Study the effect of Nano Zro2 and Tio2 and rotation speed on friction behavior of rotary friction welding of HIPS and P.P

2021 ◽  
Author(s):  
Mohammad Afzali ◽  
Vahid Asghari
Keyword(s):  
Mechanical Properties ◽  
Friction Welding ◽  
High Speed ◽  
Welding Process ◽  
Melting Process ◽  
Numerical Control ◽  
Bending Test ◽  
Optimum Shape ◽  
Friction Behavior ◽  
Rotary Friction Welding

Abstract the purpose of this project was to introduce a way to improve the mechanical properties of welded dissimilar material, which gives benefits such as affordable, high speed, and suitable bond property. In this experimental project, the friction welding method has been applied, including combining parameters, such as numerical control (NC) machine including two different speeds, and three different cross-sections; including flat, cone, and step surfaces. When the welding process was done, samples were implemented and prepared via bending test of materials. the results have shown that, besides increasing the machining velocity, the surface friction increased, and so did the temperature. By considering the stated experimental facts, the melting temperature of composite materials has increased. This provides the possibility of having a better blend of nanomaterial compared to the base melted plastics. Thus, the result showed that, besides increasing the weight percentage (wt %) of Nanomaterials contents and machining velocity, the mechanical properties have increased on the welded area for all three types of samples. This enhancement is due to the better melting process on the welded area with attendance of various Nanoparticles contents. Also, the results showed that the shape of the welding area could play a significant role, and the results also change drastically where the shape changes. Optimum shape in the welding process has been dedicated to the step surface. The temperature causes the melting process, which is a significant factor in the friction welding process.

Preparation of Al2O3/Al-Si Composites by In Situ Reaction of Fe2O3+MnO2/Al System

2015 ◽  
Vol 816 ◽  
pp. 48-53
Author(s):  
Jing Zhang ◽  
Hua Shun Yu ◽  
Xin Ting Shuai ◽  
Hong Mei Chen ◽  
Guang Hui Min
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Electron Probe ◽  
Room Temperature ◽  
Manganese Content ◽  
Hardness Test ◽  
Test Results ◽  
Electron Probe Micro Analyzer ◽  
Transmission Electron ◽  
Polygonal Shape

Al2O3 particles reinforced ZL109 composites were prepared by in-situ reaction between Fe2O3+MnO2 and Al in this paper. The influence of ratio of Mn to Fe on the morphologies of Al-Si-Mn-Fe phase and mechanical properties of the composites was investigated. The microstructure was studied by electron probe micro-analyzer (EPMA) and transmission electron microscopy (TEM). The results show that the Al2O3 particles displaced by the Fe2O3+MnO2/Al system are in nanosize. The acicular Al-Si-Fe phases change from acicular to polygonal shape and become smaller with the increase manganese content. The hardness test results have no big difference on the composites. However, the ultimate tensile strength at room temperature and 350°C enhance evidently with the increasing of Mn/Fe.

Improvement in Mechanical Properties of Clay Filled Carbon-Epoxy Composite

2006 ◽  
Author(s):  
Yuanxin Zhou ◽  
Farhana Pervin ◽  
Jamese Hamilton ◽  
Shaik Jeelani
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
High Speed ◽  
High Vacuum ◽  
Test Results ◽  
Trapped Air ◽  
Set Up ◽  
Flexural Tests ◽  
Mechanical Agitator ◽  
Mmt Clay

In the present investigation, a high intensity ultrasonic liquid processor was used to obtain a homogeneous molecular mixture of epoxy resin and K-10 MMT clay. The clay were infused into the part A of SC-15 (Diglycidylether of Bisphenol A) through sonic cavitations and then mixed with part B of SC-15 (cycloaliphatic amine hardener) using a high speed mechanical agitator. The trapped air and reaction volatiles were removed from the mixture using high vacuum. Flexural tests were performed on unfilled, 1wt. %, 2wt. %, 3 wt. % and 4 wt.% clay filled SC-15 epoxy to identify the loading effect on mechanical properties of the composites. The flexural test results indicate that 2.0 wt% loading of clay in epoxy resin showed the highest improvement in strength as compared to the neat systems. After that, the nanophased matrix with 2 wt.% clay is then utilized in a Vacuum Assisted Resin Transfer Molding (VARTM) set up with satin weave carbon preforms to fabricate laminated composites. The resulting structural composites have been tested under flexural and tensile loads to evaluate mechanical properties. 13.5% improvement in flexural strength and 5.8% improvement in tensile strength were observed in carbon/epoxy nanocomposite. TGA and DMA tests were also conducted to observe the thermal stability of the structural composite.

Analysis of the Effects of Dynamic Alloying on the Structure of Aluminium and its Alloys

2021 ◽  
Vol 320 ◽  
pp. 8-13
Author(s):  
Yulia Usherenko ◽  
Viktor Mironov ◽  
Sergey Usherenko
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
High Speed ◽  
Matrix Material ◽  
Structure Change ◽  
Cosmic Dust ◽  
Structural Elements ◽  
High Speed Stream ◽  
Sic Particles ◽  
The Matrix

The dynamic alloying of aluminum and its alloy with a high-speed stream of silicon carbide (SiC) particles simulates the effect of a stream of cosmic dust on spacecraft materials. The study showed a structure change in the volume of aluminum and its alloy and the formation of new structural elements. The transformation of the structure during dynamic alloying leads to a change of the composition and mechanical properties of the matrix material.

Analysis of Physical and Mechanical Properties of Backhoe’s Bucket Repairment with Cladding Methode

2020 ◽  
Vol 841 ◽  
pp. 254-258
Author(s):  
Yustiasih Purwaningrum ◽  
Muhammad Hafiz ◽  
Risky Suparyanto
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Welding Process ◽  
Physical And Mechanical Properties ◽  
Hardness Test ◽  
Raw Material ◽  
Bending Test ◽  
Basic Material ◽  
Test Results ◽  
Low Carbon

Buckets are the most important component in backhoe construction, the bucket functions as a digger and carrier component in an excavator. Due to the heavy working media of the excavator so that this component is the most easily damaged part, damage that often occurs is wear caused by friction arising so that the thickness of the bucket is reduced which can eventually cause cracks in the bucket and in continuous use can cause the bucket to crack and broken. Cladding method is done to shorten the time or simplify the repair process is to directly patch the damaged part with a welding layer and then do the grading using a grinding. This study aims to determine the physical and mechanical properties of the material from the cladding process when compared with the raw material, the variations used are raw material, cladding with filler welding, and cladding with plates. The welding process is carried out with GMAW (Gas Metal Arc Welding) and low carbon steel. Welding results will be tested tensile strength, bending strength , impact test, hardness test, chemical composition, and corrosion rate. From the hardness test results showed that the weld metal from plate variation has the highest hardness value of 443 VHN. From the results of tensile testing the basic material has the highest value with 359.08 MPa. From the bending test results the highest value obtained from filler verification with 494.01 Mpa and the highest impact price obtained from the plate variation cladding method with a value of 1.49 J / mm2

scholarly journals The Effect of Melting Temperature Aluminum Metal Casting Using Mixed Degasser Based Sodium Fluoride and Sodium Nitrate

2019 ◽  
Vol 269 ◽  
pp. 07001 ◽  
Author(s):  
Donanta Dhaneswara ◽  
Jaka Fajar Fatriansyah ◽  
Raffi Ramadhan ◽  
Ahmad Ashari
Keyword(s):  
Mechanical Properties ◽  
Hardness Test ◽  
Casting Process ◽  
Melting Process ◽  
High Solubility ◽  
Pouring Temperature ◽  
Melt Temperature ◽  
Microstructure Observation

The effect of NaF and NaNO3 based degasser on mechanical properties of Al-Si 12% casting has been investigated. The quality of Al-Si casting, especially in mechanical properties, is important in some applications. However, the existence of gas porosity, which is formed due to the high solubility of H2 at melt temperature in casting process, reduces mechanical propertis of Al-Si 12% casting product. In this research, we used NaF and NaNO3 as degasser as an addition in casting process. The experiments were conducted at pouring temperature of 660°C, 680°C, 700°C and 720°C. The mechanical properties (which are determined by tensile test, hardness test and impact test) with and without degasser were measured and compared. We found that in all pouring temperature, the addition of degasser will improve all of mecahnical properties measured. In addition we found that the increase of tensile strength was optimum at pouring temperature of 720°C at 25,5 % of increase, hardness was optimum at pouring temperature of 720°C at 33,3 % of increase and impact strength was optimum at pouring temperature of 720°C at 25 % of increase. The improvement of mechanical properties is due to the role of NaF and NaNO3 by binding H2 gases which is formed in melting process. This H2 binding was shown in microstructure observation which shows that the porosity of casting product visually decreased.

Material characterization of tribological effects in HSS hacksaw blade

2017 ◽  
Vol 69 (3) ◽  
pp. 355-362
Author(s):  
Nor Amirah binti Mohd Amran ◽  
Mohd Sayuti bin Ab Karim ◽  
Rusdi bin Abd Rashid ◽  
Waleed Alghani ◽  
Nur Aqilah binti Derahman
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Hardness Test ◽  
Vital Role ◽  
Von Mises Stress ◽  
Content Type ◽  
Cultural Aspects ◽  
Von Mises

Purpose This study aims to present a direct repurposing activity of consumed high-speed steel (HSS) hacksaw blade into fine-looking handmade knives to increase the awareness about sustainability by evaluating the relationship between the quality of material alloys and heat treatment as well as cultural aspects such as the treatment on the HSS hacksaw blade that will affect the material hardness. Design/methodology/approach The quality of HSS hacksaw blade samples was analyzed by using scanning electron microscope/energy dispersive X-Ray spectroscopy (SEM/EDX) through the identification of material element’s properties. Besides, finite element structural analysis was performed by using SolidWorks Simulation to evaluate the material performance by determining the Von Mises stress to find the factor of safety of the knife designs. Then, the effect of tribology implementation toward mechanical properties of the handmade knives was determined by using a Rockwell C hardness test. Findings It is found that the material composition of carbon plays a vital role in increasing and improving the hardness and wear resistance of the HSS hacksaw blade. The Von Mises stress obtained is lower than the yield strength of 3,250 MPa by 71.44 per cent with the safety factor of 3.58,which means the design will not be subjected to failure. The mechanical properties of the HSS hacksaw blade such as hardness were determined averagely by 5 per cent of hardness increase. Originality/value It has been validated that the tribological effect toward the material characteristic leads to hardness changes which contributed to the enhancement of tool life of the HSS hacksaw blade, thus producing better quality knives.

scholarly journals APLIKASI MATLAB DALAM MENGUKUR KEBULATAN HASIL INDENTASI UJI KEKERASAN BAGI KARYAWAN PT. SRI TERANG LINGGA PALEMBANG

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Irawan Malik ◽  
Moch Yunus ◽  
Soegeng Witjahjo ◽  
Romli Romli
Keyword(s):  
Mechanical Properties ◽  
Mechanical Engineering ◽  
Hardness Test ◽  
Spare Parts ◽  
Production Equipment ◽  
Postal Code ◽  
Indentation Hardness ◽  
Computer Algorithms ◽  
Test Results ◽  
Hardness Tests

Provision of spare parts for production equipment needs to be prepared with specifications, number of needs and correct time of availability, and especially for critical machining components that require correct and appropriate tactics so as not to disrupt its continuity of production. However, it is not a secret for a production department to make replacement parts that have the same mechanical properties through hardness testing of components that have failed. Through a computer program with an algorithm that is able to read a photo as a result of an indentation emphasis on hardness test, it can be known quickly a roundness diameter and calculate its hardness value which will be converted into one of the mechanical properties of a material so that a profile projector is not needed. Core of this implementation of our community service program is through an assignment scheme for employees of PT. Sri Trang Lingga Palembang, located on road TPA 2, RT. 26, RW. 29, Keramasan Subdistrict, Kertapati, Palembang City, South Sumatra, postal code 30149 is how to provide theoretical and experimental knowledge of the implementation of hardness tests on metal materials by emphasizing use of computer algorithms in reading photos of indentation hardness test results as an alternative to replacement use profile projector tool that is usually used for students of D-IV Mechanical Engineering Production and Maintenance (TMPP) Department of Mechanical Engineering Sriwijaya State Polytechnic to determine size of the indentation diameter emphasis from Brinnel hardness test.

scholarly journals ВИБІР ПАРАМЕТРІВ ПРОЦЕСУ СЕЛЕКТИВНОГО ЛАЗЕ-РНОГО ПЛАВЛЕННЯ ДЛЯ МЕТАЛЕВИХ ПОРОШКІВ

2021 ◽  
pp. 48-58
Author(s):  
В. Є. Зайцев ◽  
А. С. Полупан
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Process Parameters ◽  
Material Properties ◽  
Complex Geometry ◽  
Production Costs ◽  
Protective Atmosphere ◽  
Future Research ◽  
Structural Elements ◽  
Scanning Strategy

The article deals with the issues of determining the optimal parameters of the selective laser melting (SLM) process in order to develop a technology for manufacturing aircraft structural elements from titanium alloys. This literature review notes the advantages of titanium alloys, which have higher specific strength and corrosion resistance compared to most steels and aluminum alloys. It is determined that traditional methods of forming titanium parts lead to a large amount of material waste, high production costs and long production times. It is noted that the SLM technology makes it possible to create parts of titanium alloys with complex geometry. It is also emphasized that the titanium glory Ti-6Al-4V is the most popular titanium alloy used in aircraft construction. This paper presents a description of the SLM process and a list of parameters that affect design and final material properties. Attention is drawn to the main parameters of SLM: energy density, process temperature (temperature of the building platform), environmental conditions, material properties and scanning strategy. The influence of the above parameters of the SLM process on product quality and production time is shown. Finding the optimal values for the SLM process parameters is an important step in creating a part that is manufactured to obtain priority mechanical properties. The need is stressed to employed a protective atmosphere during the process is emphasized, the use of internal gases (nitrogen, argon and helium) to prevent oxidation, significantly affects the process, the final mechanical properties and microstructure of the parts produced. It is shown that for the production of high-quality products, it is important that the metal powder has a spherical grain shape and a size not exceeding the thickness of one applied layer. The build chamber temperature should be varied depending on the desired mechanical properties of the final product. Variable process parameters (scanning strategy, laser parameters) affect the thermal balance, productivity, geometric accuracy of porosity, which affects the mechanical properties and microstructure. This analysis of foreign experience and future research will further improve the technology for the production of aircraft structural elements.

INFLUENCE OF DEAGGLOMERATION STATES OF CARBON NANOTUBES ON THE THERMAL AND MECHANICAL PROPERTIES OF CARBON NANOTUBE-REINFORCED POLYETHYLENE OXIDE

2009 ◽  
Vol 08 (01n02) ◽  
pp. 23-27 ◽  
Author(s):  
KWABENA A. NARH ◽  
AHMED-TIJANI AGWEDICHAM ◽  
LAILA J. JALLO ◽  
KYONG Y. RHEE ◽  
JI H. LEE
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Polyethylene Oxide ◽  
High Speed ◽  
Test Results ◽  
Scanning Calorimetry ◽  
Sem Images ◽  
Ultrasonic Probe ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Composites of polyethylene oxide and carbon nanotubes were produced by first deagglomerating highly agglomerated multi-walled carbon nanotubes in water, using a high-intensity ultrasonic probe, and then mixing with a solution of the polymer using a high-speed mixer. The deagglomeration of the nanotubes was carried out at different amplitudes of the vibrating ultrasonic probe. Differential scanning calorimetry results show an increase in melting temperature with increase in amplitude of sonication. Also, tensile test results show improved mechanical properties, with increased degree of deagglomeration of the nanotubes. SEM images show that the extent of nanotubes dispersion in the polymer matrix correlates with the extent of deagglomeration.

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