Mechanical property evaluations of an amorphous metallic/ceramic multilayer and its role in improving fatigue properties of 316L stainless steel

In this paper, tensile fatigue properties of 316L stainless steel thin sheets with a thickness of 0.1 mm are studied. The tests are implemented by using micro mechanical fatigue testing sysytem (MMT-250N) at room temperature under tension-tension cyclic loading. The S-N curve of the thin sheets descends continuously at low cycle region. Cyclic σ-N curve and ε-N curve are obtained according to the classical macroscopical fatigue theory. The results agree well with the experimental fatigue data, showing that the traditional fatigue research methods are also suitable for description of MEMS fatigue in a certain extent. The effect factor of frequency was considered in this study and the results show that the fatiuge life and the fatigue strength are increased as loading frequency increasing.

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Investigation of crystal growth mechanism during selective laser melting and mechanical property characterization of 316L stainless steel parts

Materials & Design ◽

10.1016/j.matdes.2016.03.111 ◽

2016 ◽

Vol 100 ◽

pp. 291-299 ◽

Cited By ~ 225

Author(s):

Di Wang ◽

Changhui Song ◽

Yongqiang Yang ◽

Yuchao Bai

Keyword(s):

Mechanical Property ◽

Stainless Steel ◽

Crystal Growth ◽

Selective Laser Melting ◽

Growth Mechanism ◽

316L Stainless Steel ◽

Laser Melting ◽

Crystal Growth Mechanism ◽

Property Characterization

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Anisotropy in the microstructure and mechanical property for the bulk and porous 316L stainless steel fabricated via selective laser melting

Materials Letters ◽

10.1016/j.matlet.2018.09.152 ◽

2019 ◽

Vol 235 ◽

pp. 1-5 ◽

Cited By ~ 35

Author(s):

Decheng Kong ◽

Xiaoqing Ni ◽

Chaofang Dong ◽

Liang Zhang ◽

Cheng Man ◽

...

Keyword(s):

Mechanical Property ◽

Stainless Steel ◽

Selective Laser Melting ◽

316L Stainless Steel ◽

Laser Melting ◽

Microstructure And Mechanical Property

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On the Microstructures and Fatigue Behaviors of 316L Stainless Steel Metal Injection Molded with Gas- and Water-Atomized Powders

Metals ◽

10.3390/met8110893 ◽

2018 ◽

Vol 8 (11) ◽

pp. 893 ◽

Cited By ~ 7

Author(s):

Yongyun Zhang ◽

Ensheng Feng ◽

Wei Mo ◽

Yonghu Lv ◽

Rui Ma ◽

...

Keyword(s):

Stainless Steel ◽

316L Stainless Steel ◽

Fatigue Cracks ◽

Selective Laser Sintering ◽

Fatigue Tests ◽

Fatigue Properties ◽

Metal Injection Molding ◽

Strengthening Effect ◽

Lower Oxygen ◽

Order Of Magnitude

316L stainless steel samples are fabricated by metal injection molding using water-atomized and gas-atomized powder with different oxygen contents. The influences of oxygen on the microstructural evolution and fatigue properties of the samples are investigated. The oxygen tends to react with Mn and Si to form oxide particles during sintering. The oxides hamper the densification process and result in decreased sintered density. Moreover, their existence reduces the Mn and Si dissolving into the base metal and compromises the solution strengthening effect. The oxides lead to stress concentration in the tensile and fatigue tests and become the initiation sites of fatigue cracks. After sintering, the samples made from the gas-atomized powder have a much lower oxygen content compared to those made from the water-atomized powder, therefore, exhibiting much better mechanical properties. The tensile strength, yield strength and the elongation of the samples made from the gas-atomized powder are 560 MPa, 205 MPa, and 58%, respectively. Their fatigue lives are about one order of magnitude longer than the samples made from water-atomized powder, and also longer than those fabricated by powder metallurgy and selective laser sintering which were reported in other studies.

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