Effect of Alloying Elements on the Microstructure and Properties of AZ91D-xCa-ySr

2012 ◽  
Vol 591-593 ◽  
pp. 993-996
Author(s):  
Qing Zhu Sun ◽  
Hai Bo Wang ◽  
Yong Chang Zhu
Keyword(s):  
Mechanical Properties ◽  
Fatigue Testing ◽  
Low Cycle Fatigue ◽  
Testing Machine ◽  
Alloying Elements ◽  
Cycle Fatigue ◽  
Microstructure And Properties ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Electronic Microscope

In this paper, the microstructure and properties of AZ91D-xCa-ySr were studied by adding alloying elements. The mechanical properties were investigated by WDT-10 micro-electric universal testing machine and WD-T low cycle fatigue testing machine. The OLYMPUS-GX71 Optical electronic microscope, XRD and SEM were employed to investigate the microstructure of AZ91D. The results showed that the grains were refined by adding Ca,Sr,Gd and Y. Low cycle fatigue (LCF) behavior of AZ91D-0.4Ca-0.3Sr was improved obviously by adding 3.0%Gd and 3.0%Y into material, the tensile strengthen was up to 299Mpa, the elongation was 0.78%.

Crack mode and life of Ti-6Al-4V under multiaxial low cycle fatigue

2015 ◽  
Author(s):  
Takamoto Itoh ◽  
Masao Sakane ◽  
Takahiro Morishita ◽  
Hiroshi Nakamura ◽  
Masahiro Takanashi
Keyword(s):  
Hollow Cylinder ◽  
Stress Ratio ◽  
Biaxial Loading ◽  
Fatigue Testing ◽  
Low Cycle Fatigue ◽  
Testing Machine ◽  
Multiaxial Fatigue ◽  
Cycle Fatigue ◽  
Loading Test ◽  
Failure Life

This paper studies multiaxial low cycle fatigue crack mode and failure life of Ti-6Al-4V. Stress controlled fatigue tests were carried out using a hollow cylinder specimen under multiaxial loadings of ?=0, 0.4, 0.5 and 1 of which stress ratio R=0 at room temperature. ? is a principal stress ratio and is defined as ?=sigmaII/sigmaI, where sigmaI and sigmaII are principal stresses of which absolute values take the largest and middle ones, respectively. Here, the test at ?=0 is a uniaxial loading test and that at ?=1 an equi-biaxial loading test. A testing machine employed is a newly developed multiaxial fatigue testing machine which can apply push-pull and reversed torsion loadings with inner pressure onto the hollow cylinder specimen. Based on the obtained results, this study discusses evaluation of the biaxial low cycle fatigue life and crack mode. Failure life is reduced with increasing ? induced by cyclic ratcheting. The crack mode is affected by the surface condition of cut-machining and the failure life depends on the crack mode in the multiaxial loading largely.

Low Cycle Fatigue Test of Lead Free Solders Using Small Sized Specimen

2017 ◽  
Vol 734 ◽  
pp. 194-201 ◽  
Author(s):  
Yutaka Konishi ◽  
Takamoto Itoh ◽  
Masao Sakane ◽  
Fumio Ogawa ◽  
Hideyuki Kanayama
Keyword(s):  
Fatigue Testing ◽  
Low Cycle Fatigue ◽  
Testing Machine ◽  
Strain Range ◽  
Fatigue Tests ◽  
Lead Free ◽  
Cycle Fatigue ◽  
Bulk Specimen ◽  
Free Solder ◽  
Lead Free Solders

This paper investigates the fatigue results in low cycle fatigue region obtained from a miniaturized specimen having a 6mm gage length, 3mm diameter and 55mm total length. Fatigue tests were performed for two type lead-free solders using horizontal-type electrical servo hydraulic push-pull fatigue testing machine. Materials employed were Sn-3.0Ag-0.5Cu and Sn-5Sb. The results from Sn-3.0Ag-0.5Cu were compared with those obtained using a bulk specimen in a previous study. Relationship between strain range and number of cycles to failure of the small-sized specimen agreed with those of the bulk specimens. The testing techniques are applicable to Sn-5Sb following the Manson-Coffin law. These results confirm that the testing technique proposed here, using small-sized specimen, is suitable to get fruitful fatigue data for lead-free solder compounds.

Improvement of Thermal and Ablative Properties of Phenolic Resin by SiC and MMT

2016 ◽  
Vol 707 ◽  
pp. 8-12
Author(s):  
Keeratikarn Kuttiwong ◽  
Jantrawan Pumchusak
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Thermogravimetric Analysis ◽  
Phenolic Resin ◽  
Testing Machine ◽  
Hot Compression ◽  
Thermal Stabilities ◽  
Universal Testing Machine ◽  
Universal Testing

In this work, the improvement of thermal and ablative properties of the phenolic resin by the addition of silicon carbide (SiC) and montmorillonite (MMT) were studied. The phenolic composites were fabricated by hot compression. The thermal stabilities, mechanical properties and ablative properties of the neat phenolic resin and the SiC/MMT phenolic composites were examined using a Lloyd universal testing machine, thermogravimetric analysis (TGA) and ablation tests (an oxyacetylene torch), respectively. Mass ablation rates were measured after flame exposure. The results showed that SiC/MMT provided the higher thermal stabilities and lower ablation rates to the phenolic resin.

scholarly journals A study on the influence of the loading rate and orientation on some mechanical properties of cassava tubers of different ages

2021 ◽  
Author(s):  
Olawale Charles Ogunnigbo ◽  
Adetan Dare ◽  
Morakinyo Tunde ◽  
Olusunmade Olusola ◽  
Ojerinde Joshua
Keyword(s):  
Mechanical Properties ◽  
Loading Rate ◽  
Testing Machine ◽  
Longitudinal Direction ◽  
Universal Testing Machine ◽  
Loading Direction ◽  
Universal Testing ◽  
Longitudinal Loading ◽  
Different Ages ◽  
Design And Construction

The study determined the effects of the speed of loading and the loading orientation on some selected mechanical properties of the TME 419 cassava tuber variety at different ages of the tuber which are essential in the design and construction of the processing and handling equipment of a cassava peeler. The properties considered include the bioyield and rupture points, compressive and rupture strengths, toughness and firmness, and moduli of stiffness and toughness, which were carried out in the transverse and longitudinal loading direction using an Instron Universal Testing Machine (UTM). As the loading rate increased from 5.00 to10.00 mm·min<sup>–1</sup> and the age of the tuber varies from 1.00 to 2.00 years, the bioyield and rupture points, compressive and rupture strengths, toughness, firmness, moduli of stiffness and toughness in the transverse and longitudinal direction varies from 1 619.61 to 3 636.19 N and 136.08 to 384.52 N, 0.48066 to 1.07913 N·mm<sup>–2 </sup>and 0.26604 to 0.75173 N·mm<sup>–2</sup>, 766 to 1055 N·mm<sup>–1</sup> and 1 262 to 2 965 N·mm<sup>–1</sup>, 303.98 to 553.68 mm·min<sup>–1</sup> and 28.08 to 53.71 mm·min<sup>–1</sup> 2.30 to 4.19 N·mm<sup>–2</sup> and 5.376 to 8.94N·mm<sup>–2 </sup>respectively. Generally, the values of the properties examined are higher in the longitudinal loading orientation than in the transverse and for a year and half old tuber which will be useful in designing an efficient cassava peeling system.

scholarly journals Comparison of different microstructure scaffolds for tissue regeneration

2016 ◽  
Author(s):  
Andžela Šešok ◽  
Deividas Mizeras ◽  
Algirdas Vaclovas Valiulis ◽  
Julius Griškevičius ◽  
Mangirdas Malinauskas
Keyword(s):  
Mechanical Properties ◽  
Tissue Regeneration ◽  
Low Cost ◽  
Testing Machine ◽  
Raw Material ◽  
Bending Tests ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
3D Printed

In this work we aim to determine the mechanical properties of 3D printed PLA objects having various orientation woodpile microarchitectures. In this work we chose three different 3D microarchitectures: woodpile BCC (each layer consists of parallel logs which are rotated 90 deg every next layer), woodpile FCC (every layer is additionally shifted half of the period in respect to the previous parallel log layer) and a rotating woodpile 60 deg (each layer is rotated 60 deg in respect to the previous one). Compressive and bending tests were carried out TIRAtest2300 universal testing machine. We found that 60 deg rotating woodpile geometry had the highest values which was approximately 3 times than the BCC or FCC log arrangements. Thus we prove that employing low-cost equipment and applying the same raw material one can create objects of desired rigidity.

scholarly journals Selected biometric and mechanical properties of the common reed Phragmites australis and the reed sweet grass Glyceria maxima rhizomes

2016 ◽  
Vol 48 (4) ◽  
pp. 289-297 ◽  
Author(s):  
Weronika Kowalik ◽  
Kinga Pachuta ◽  
Jerzy Jeznach
Keyword(s):  
Mechanical Properties ◽  
Phragmites Australis ◽  
Testing Machine ◽  
Common Reed ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Tensile Forces ◽  
The Common

Abstract The results on the selected biometric and mechanical properties of common reed Phragmites australis and reed sweet grass Glyceria maxima were presented. The experiments were conducted with the help of the universal testing machine Instron 5966. The underground biomasses, diameters, tensile forces, displacements and tensile strengths for summer and winter rhizomes of both species were assessed and compared. The final results indicate that rhizomes of common reed had higher values of the studied parameters of biometric and stretching than sweet reed grass rhizomes. Therefore, there are more opportunities to use them to protect the coastline.

Study on Microstructures and Mechanical Properties of AlSi9Cu3 Aluminum Alloy Fabricated by Liquid Forging

2011 ◽  
Vol 418-420 ◽  
pp. 353-356
Author(s):  
Sheng Li Li ◽  
Wei Lian Sun ◽  
Hui Qiang Wang ◽  
Bo Sun
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Testing Machine ◽  
Optical Microscope ◽  
Excellent Performance ◽  
Direct Reading ◽  
Forming Mechanism ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Microstructures And Mechanical Properties

Study the properties of AlSi9Cu3 aluminum alloy test bars fabricated by liquid forging with instruments such as optical microscope, direct reading spectrometer and micro-controlled electronic universal testing machine. Further more，analyze the microstructure and forming mechanism of AlSi9Cu3 aluminum alloy fabricated by liquid forging, the study shows : AlSi9Cu3 aluminum alloy fabricated by liquid forging has excellent performance and good prospects in production.

The Effect of Hydrostatic Pressure Environment on the Low Cycle Fatigue Properties of a Maraging Steel

1973 ◽  
Vol 95 (3) ◽  
pp. 157-160 ◽  
Author(s):  
G. Lunsford ◽  
A. W. Pense ◽  
P. S. Venkatesan ◽  
M. J. McIntosh
Keyword(s):  
High Pressure ◽  
Maraging Steel ◽  
Fatigue Testing ◽  
Low Cycle Fatigue ◽  
Testing Machine ◽  
Fluid Pressure ◽  
Fatigue Properties ◽  
Uniaxial Tensile ◽  
Cycle Fatigue ◽  
Effect Of Hydrostatic Pressure

To investigate the low cycle fatigue properties of an 18 percent nickel maraging steel, a high pressure fatigue testing machine including the high pressure chamber and associated hydraulic controls was designed and developed to apply simultaneously to the specimen (1) constant fluid pressure up to 100,000 psi, (2) mean uniaxial tensile or compressive stress, and (3) alternating push-pull load at a selected rate. Using this machine, notched and unnotched specimens were tested. Results indicated a definite increase in fatigue life of the material in the high pressure environment.

Optimization of the Fatigue Properties of INCONEL Alloy 617

1991 ◽  
Author(s):  
G. D. Smith ◽  
D. H. Yates
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Low Cycle Fatigue ◽  
Optimum Combination ◽  
Alloying Elements ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Alloy 617 ◽  
Inconel Alloy ◽  
Key Characteristics

Rigorous control of the annealing practice and certain alloying elements can directly influence key characteristics which aid in optimizing low cycle fatigue (LCF) properties of INCONEL® alloy 617. These procedures favorably influence grain size, carbide microstructure and mechanical properties. It is shown how an optimum combination of these procedures can greatly improve LCF properties of alloy 617 sheet.

Experimental Investigation on Mechanical Properties of Wheat Husk Pulp Rein Forced Epoxy Composites

2020 ◽  
Vol 36 ◽  
pp. 114-125
Author(s):  
Kanwal Jit Singh ◽  
Rohit Kumar ◽  
Ramratan
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Epoxy Resin ◽  
Testing Machine ◽  
Weight Percentage ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
The Impact ◽  
Wheat Husk

The wheat husk pulp epoxy resin composites were prepared by compression Molding Method and their physical and Mechanical Properties were studied by universal testing Machine. The composites were tested by tensile strength testing and impact strength tester. The content of Wheat husk pulp is varied (35%, 45%, 55%) weight percentage whereas the epoxy resin is varied (50%, 40%, 30%) percentage is kept constant 15% in hardener. Composites have been fabricated using hand layup technique using a suitable mold developed in industry. All the sample have been tested in Universal testing machine as per ASTM standard for tensile strength and impact strength it is observed that composite with 35% wheat husk pulp is having highest tensile strength of 4mm (4.29MPa) and 8mm (6.31Mpa). The impact strength of Composite with 35% wheat husk pulp was highest than 35%to 45% wheat husk pulp.

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