scholarly journals PENGARUH NORMALIZING TERHADAP BAJA 20Mn Cr6 HASIL PENGECORAN UNTUK SUPPORT ROLLER

POROS ◽  
2018 ◽  
Vol 16 (1) ◽  
Author(s):  
Yusril Irwan Irwan
Keyword(s):  
Rotary Kiln ◽  
Mechanical Test ◽  
Hardness Test ◽  
Casting Process ◽  
Air Cooling ◽  
Machining Processes ◽  
Support Roller ◽  
Softening Process ◽  
Micro Structures ◽  
Roller Support

Rotary Kiln  machine  is used in fertilizer plant which is function to mix the fertilizer ingredients. Part of the Rotary Kiln is support by using a roller. Support roller is made of 20MnCr6 material, AISI 5120 (0.18% C) with casting process. Normalizing phase on casting processes is using to increase strength of the material The objectives of the normalizes process is to eliminate residual stresses, softening, increasing toughness, homogenization of micro structures and to ease machining processes. The effect of normalizing can be measured by using  mechanical test, ie tensile test, hardness test and microstructure analysis. Test specimens were made the same material with normalizing and without normalizing process. Normalizing process temperature at 900oC heating for 150 minutes with air cooling for 7 hours. The results has shown that normalizing material has lowest tensile strength of 41.05 kgf/mm2 is compared to 42.16 kgf/mm2. However, the ductile fracture is higher 41.2% is compared to 29.52%, the microstructure formed uniformly evenly compared without normalizing. The softening process also makes the roller support rotate due to rubbing with riding ring.

Effect of Secondary Cooling on Non-Oriented Electrical Steel Strips Produced by Twin-Roll Casting Process

2013 ◽  
Vol 690-693 ◽  
pp. 218-221
Author(s):  
Ting Zhang ◽  
Xiao Ming Zhang ◽  
Zhi Yuan Guo ◽  
Yu Qian Wang ◽  
Cheng Gang Li
Keyword(s):  
Electrical Steel ◽  
Casting Process ◽  
Air Cooling ◽  
Secondary Cooling ◽  
Twin Roll Casting ◽  
Steel Strips ◽  
Roll Casting ◽  
Average Size ◽  
Equiaxed Grains ◽  
Twin Roll

Effect of secondary cooling on non-oriented electrical steel strips was investigated. The 2.0 mm thick cast strips contain two compositions were produced by twin-roll casting process, cooled in the air or cooled by spraying water. The microstructure was observed by optical microscopy, and EBSD was used to characterize the texture of the cast strips. The results showed that air-cooling cast strips have uniform and equiaxed grains with average size of 250 μm. The microstructure of the water-spraying cast strips compose of most equiaxed grains and a small number of abnormal big grains. At the same time, the secondary cooling rate mildly affects the cast texture strength but has no influence on the texture type.

Tribological characteristics of AA8090-WC-ZrC metal matrix composites prepared by stir casting process for Aerospace applications

2021 ◽  
Vol 73 (6) ◽  
pp. 980-985
Author(s):  
Kalaiyarasan A ◽  
Sundaram S ◽  
Gunasekaran K ◽  
Bensam Raj J.
Keyword(s):  
Metal Matrix ◽  
Materials Science ◽  
Scientific Information ◽  
High Hardness ◽  
Hardness Test ◽  
Casting Process ◽  
Stir Casting ◽  
Hybrid Particles ◽  
Content Type ◽  
The Impact

Purpose Aerospace field is demanding a material with superior strength and high resistance against wear, tear and corrosion. The current study aimed to develop a new material with high performance to be applicable in aerospace field Design/methodology/approach A metal matrix composite AA8090-WC-ZrC was fabricated using stir casting method and its tribological behavior was investigated. Totally, five composites viz. AA/Z, AA/W, AA/WZ (1:3), AA/WZ (1:1) & AA/WZ (3:1) were prepared. Micro hardness, tensile and wear study were performed on the fabricated composites and the results were compared with AA8090 alloy Findings Vickers hardness test resulted that the AA/W composite showed the higher hardness value of 160 HB compared to other materials due to the reinforcing effect of WC particles with high hardness. Tensile test reported that the AA/W composite displayed the maximum tensile strength of 502 MPa owing to the creation of more dislocation density. Further, wear study showed that the AA/W composite exhibited the least wear rate of 0.0011 mm3/m because of the more resisting force offered by the WC particles. Furthermore, the AA/W composite showed the slightest mass loss of 0.0028 g and lower COF value of 0.31 due to the hinder effect of WC particle to the movement of atoms in AA8090 alloy Originality/value This work is original in the field of aerospace engineering and materials science which deals with the fabrication of AA8090 alloy with the reinforcement particles such as tungsten carbide and zirconium carbide. The impact of the combination of hybrid particles and their volume fractions on the tribological properties has been investigated in this work. This work would provide new scientific information to society.

Properties and behavior of squeeze pressure on aluminum molybdenum DI-supplied composite

2018 ◽  
Vol 7 (3.3) ◽  
pp. 496
Author(s):  
S Arunkumar ◽  
M Chandrasekaran ◽  
T Vinod Kumar ◽  
V Muthuraman
Keyword(s):  
Casting Machine ◽  
Fine Powder ◽  
Hardness Test ◽  
Casting Process ◽  
Stir Casting ◽  
Furnace Temperature ◽  
Cast Material ◽  
Squeeze Pressure ◽  
And Behavior ◽  
Squeeze Casting Process

To develop a metal matrix composite with lubricative properties with the help of various casting process and they are tested for their proper-ties. Casting machine is turned ON. Furnace temperature is set to 850o C. Preheater temperature is set to 180o C. Pathway temperature is set to 550o C. The furnace is allowed to get heated up. Once it gets heated upto 600o C, the A-Si alloy is dropped into the furnace. The alloy gets melted at around 800-850o C. Molybdenum di-sulphide fine powder is preheated and then mixed with the molten metal. Molybdenum di-sulphide is a reinforcement added and it is preheated to increase the wettability. Stainless steel stirrer is used to mix the alloy and graphite well. Stirrer is rotated between 200-300rpm.Once both the alloy and reinforcement gets mixed up into a single red hot molt, it is poured. The molt now leaves from the bottom of the furnace through the pathway. Pathway is maintained at 550o C to avoid solidification of molt in the path. Pathway carries the molt to a die, where it is poured. A squeeze pressure of 30 tonnes and 60 tonnes is given on the die using a piston. Die is split up and the mould is taken out from it. The die, furnace, pathway are coated with a layer of non-stick coating to avoid the sticking of alloy in the walls. The same process is repeated in stir casting, except that, pathway is not needed. The molten alloy is poured directly into the die without any pressure being applied. The die is split and the mould is taken. Coating is done before the next casting.Graphite powder and the Al-Si alloy materials are casted using squeeze casting process. Wear strength, tensile strength, flexural strength, impact strength and hardness test for the squeeze casted material is found out. The same materials are casted with the help of the stir casting process and they are compared with the squeeze cast material. Various testing process are to be carried out on the casted material and the results are compared.  

Evaluation of Bioabsorbable Mg–Mn Alloy with Anodic Oxidation Treatment

2020 ◽  
Vol 20 (9) ◽  
pp. 5625-5628
Author(s):  
Seungyun Lee ◽  
Doyun Lee ◽  
Kyungmin Lee ◽  
Chan Park ◽  
Hyunphil Lim ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Cell Viability ◽  
Magnesium Alloys ◽  
Anodic Oxidation ◽  
Mechanical Test ◽  
Hardness Test ◽  
Hydrogen Gas ◽  
Oxidation Treatment ◽  
Gas Formation ◽  
Anodic Oxidation Treatment

Magnesium alloys as biodegradable materials have been examined that may replace bone screws and plates in recent studies. But the velocity control of magnesium alloy is very difficult. Until now, the magnesium alloys degrade very fast, thus it couldn’t maintain the function in clinical field. Thus the purpose of this study is to evaluate the degradability of anodized magnesium alloy for control the velocity. For this experiment, a Mg–xMn (x = 0, 0.5, 1 wt%) binary alloy was cast in argon gas (99.99%) atmosphere. The specimens of the surface treatment group were anodized for 15 minutes at a voltage of 120 V at room temperature using calcium gluconate, sodium hexametaphosphate, and sodium hydroxide electrolyte. For the mechanical test, SEM, roughness test, hardness test were examined. The degradation test was conducted to measure the hydrogen gas formation volume. For biologic test, cell viability were tested. After anodic oxidation treatment, the surface showed the crater formation, the size of craters were about 200~300 nm. Among nonanodized group, the Mg–0.5Mn showed the highest Vickers hardness and cell viability. However for biodegradability test, Mg–1Mn showed the lowest the hydrogen gas formation. For anodic oxidation treatment, anodic oxidation treatment makes rougher surface, higher hardness, good cell response and lower degradation rate. Overall, anodized Mg–1Mn showed the possibility for clinical application in bone screw and bone plate.

scholarly journals Static and Dynamic Analysis of Aircraft Wing Made by LM 25 and ALSiC Metal Matrix Composite

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1319-1323
Keyword(s):  
Silicon Carbide ◽  
Composite Material ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Material Properties ◽  
Metal Matrix ◽  
Hardness Test ◽  
Casting Process ◽  
Aircraft Wing ◽  
Static And Dynamic Analysis

This paper discusses about the weight reduction in the wing structure that improves the productivity and performance of an aircraft wing. Decrease in the mass of the wings has higher significance compared all other air craft parts Aircraft wing structures are analyzed with LM25 and a metal matrix composite material which is a mix of LM25 and Silicon Carbide (SiC) where in aluminum is the base metal and silicon carbide is added in different weight proportions. By varying silicon carbide percentage in LM25 four types of samples are prepared utilizing stir casting process. The young's modulus, Poisson's ratio and thickness of every sample are determined cautiously by exposing the sample to tensile test and hardness test. By looking at the material properties acquired tentatively ideal level of silicon carbide in aluminum is found. Static basic investigation is completed in ANSYS by contributing the properties of the ideal example which are acquired tentatively. The outcomes acquired from ANSYS for pure AL25 and metal matrix composite (SiC) are compared. By looking at the outcomes it is discovered that composite material has preferred material properties and stresses over LM25.

scholarly journals Weight Optimization of Roller Shaft of Pad Steam Machine

2019 ◽  
Vol 9 (1) ◽  
pp. 7616-7623
Keyword(s):  
Carbon Steel ◽  
Textile Industry ◽  
Mechanical Test ◽  
Research Work ◽  
Hardness Test ◽  
Weight Optimization ◽  
Element Analysis ◽  
Steel Material ◽  
Stiffness Characteristic ◽  
Steel Aisi

the roller shaft of a continuous pad steam machine suddenly appeared the abnormal when it was running condition in textile industry which effects on maintenance of machine, time, cost, productivity importance etc. This paper present the material analysis, weight optimization and stiffness characteristic of roller shaft of pad steam machine maintaining the integrity of the specifications. A 3D model is created in Catia V5RI to mating to design, optimization and finite element analysis of roller shaft used in pad steam machine which is made of carbon steel material. The FEA was done in HYPER WORK software (Nastran & Optistruct) in two parts preprocessing and post processing by using four different materials based on their composition viz. Carbon steel AISI 1040, EN8, EN24, and AISI 6150. The parameter like von misses stress, deformation; maximum and minimum principal stress & strain were obtained from analysis Software. Santosh D Dalvi et. al. also worked on this system in 2017 by comparison of existing and new material AISI 1040. FEA show that the EN24 Material is best suggested material among all also find out results like weight and stiffness parameter. It is resulted of 12.527 % of weight with reduction in deformation. Performed two mechanical test i.e. tensile test and hardness test as per ASTM on sample specimens; results show that the strength and hardness are within the limit. This research work is improving shaft parameters which are used in textile industry, heavy duty application etc.

Mechanical Test of Aluminum-Zirconium-Silicate Composite Prototype with Filler Volume Variation

2019 ◽  
Vol 829 ◽  
pp. 81-86
Author(s):  
Elin Karlina ◽  
Kosterman Usri ◽  
Renny Febrida ◽  
Camellia Panatarani ◽  
I Made Joni ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Mechanical Test ◽  
Testing Machine ◽  
Hardness Test ◽  
Hardness Number ◽  
Volume Group ◽  
Group A ◽  
Composite Filler ◽  
Group B ◽  
Diametral Tensile Strength

Recently, ceramic material has become a main object of scientific interest especially in dental material. The advance of dental materials technology has led to use of zirconia-based ceramics for composite filler. In this study, composite filler has been synthesized from natural zircon sand through geopolymerization method. Composite prototype were made with different filler volume to evaluate mechanical properties including hardness number and diametral tensile strength. Samples divided into two groups with 50 wt% filler volume (group A) and 75 wt% filler volume (group B) which 3 samples for each group. The surface micro hardness of each group tested by Leco M-400-H1 vickers microhardness testing machine and for diametral tensile strength tested using universal testing machine (Lloyd) with crosshead speed of 1,0 ± 0,25 mm/min. The data were analyzed using independent sample t-test. The results showed that the average of hardness number on group A was 13,8 VHN while for group B was 24,1 VHN. The average of diametral tensile strength for group A was 20,461 MPa and 27,689 MPa for group B. Statistical result showed that the value (P<0,05). The conclusion, there is a signifficant difference on the result of hardness test between group A (50 wt% filler volume) and group B (75 wt% filler volume) and also on diametral tensile strength test.

Effect of Tin Addition on Shape Memory Effect and Mechanical Properties of Cu-Al-Ni Shape Memory Alloy

2020 ◽  
Vol 38 (8A) ◽  
pp. 1178-1186
Author(s):  
Raad S. Ahmed Adnan
Keyword(s):  
Mechanical Properties ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Transformation Temperature ◽  
Mechanical Test ◽  
Hardness Test ◽  
Micro Hardness ◽  
Recovery Strain ◽  
Shape Memory Properties

This study examines the effect of Sn additions on Cu-14%Al-4.5%Ni shape memory alloy. Sn was added in three different percentages (0.3,1,3) %. The alloys were mechanically tested both in compression test and micro hardness test. Also, a thermo-mechanical test was performed on the alloys. Results showed an increase in the transformation temperature outside the domain and also a better recovery strain with the increase of Sn percentage of 3% Sn addition showed the best results in mechanical properties while the 3% Sn showed a better Shape Memory Properties near to super elastic.

Production and Assessment of AZ91 Reinforced with Nano SiC through Stir Casting Process

2022 ◽  
Vol 1048 ◽  
pp. 9-14
Author(s):  
J. Allen Jeffrey ◽  
S. Suresh Kumar ◽  
P. Hariharan ◽  
M. Kamesh ◽  
A. Mithun Raj
Keyword(s):  
Testing Machine ◽  
Thermal Characteristics ◽  
Hardness Test ◽  
Casting Process ◽  
Stir Casting ◽  
Industrial Applications ◽  
Hardness Tester ◽  
Two Samples ◽  
Peak Increase ◽  
Magnesium Composites

Magnesium, a light weight alloy used in multiple engineering industrial applications because of its good Physical, Chemical and Thermal characteristics. Magnesium composites play an important role in partial or entire replacement of numerous alloys.This current work deals with Nano silicon carbide of about 100nm was incorporated with AZ91magnesium alloy through liquid state composite processing. Two samples are made using 0% Nano SiC and 3% Nano SiC and are characterized through tensile test in Universal Testing Machine, Micro hardness test in Vickers hardness tester and Microstructure in Optical Microscopy. From the study it was clear that there is a peak increase in hardness of about 36% when compared to as casted AZ91.

Microstructural Evolution of Fe-Based Metallic Glass/2024-Al Powder during High Energy Ball Milling Process

2013 ◽  
Vol 745-746 ◽  
pp. 335-340 ◽  
Author(s):  
Rui Xiao Zheng ◽  
Yi Tan Zhang ◽  
Su Jing Ge ◽  
Han Yang ◽  
Chao Li Ma
Keyword(s):  
Electron Microscopy ◽  
Metallic Glass ◽  
Ball Milling ◽  
Microstructural Evolution ◽  
Alloy Powder ◽  
Mechanical Test ◽  
Hardness Test ◽  
High Energy ◽  
Al Alloy ◽  
Micro Hardness

Nanostructured Al alloy powder was prepared by ball milling of a mixture of Fe-based metallic glass (FMG) powder and 2024-Al alloy powder. Microstructural evolution and mechanical properties of the milled composite powder were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and micro-hardness test. It is revealed that after 24h milling, the grain size of the Al alloy powder reduced to about 30nm, and the FMG particles were uniformly distributed throughout the Al matrix. The mechanical test indicated that the micro-hardness of the powder was significantly improved.

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