Enhancement of low-cycle fatigue life of high-nitrogen austenitic stainless steel at low strain amplitude through ultrasonic shot peening

被引：15

作者：

Kumar, Chandra Shekhar ^{[1
]}

Chattopadhyay, Kausik ^{[1
]}

Singh, Vakil ^{[1
]}

Mahobia, Girija Shankar ^{[1
]}

机构：

[1] Indian Inst Technol BHU, Dept Met Engn, Varanasi 221005, Uttar Pradesh, India

来源：

MATERIALS TODAY COMMUNICATIONS | 2020年 / 25卷

关键词：

Metals and alloys; Nanostructured materials; Ultrasonic shot peening; Low cycle fatigue; Compressive residual stress; Fatigue life; MECHANICAL ATTRITION TREATMENT; NANOSTRUCTURED SURFACE-LAYER; STACKING-FAULT ENERGY; CORROSION BEHAVIOR; MICROSTRUCTURE; NANOCRYSTALLIZATION;

D O I：

10.1016/j.mtcomm.2020.101576

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Austenitic stainless steel stabilized by nitrogen has a very low content of undesired nickel (0.1 wt%). Such steel is a much better alternative for bioimplants than that stabilized with a high nickel content (>= 8 wt%). For biomedical applications, in particular for orthopedic implants, resistance of the implant material to cyclic loading is an essential criterion. This investigation considers the effect of surface treatment by ultrasonic shot peening (USP) on low-cycle fatigue behavior, with 3 mm shots for varying durations of 3-18 min, at total strain amplitudes ranging from +/- 0.4% to +/- 0.8%. It was observed that, while the fatigue life was reduced due to USP at the highest strain amplitude of +/- 0.8%, it was enhanced by approximate to 18 times at the lowest strain amplitude of +/- 0.4% following 18 min of USP treatment.

引用

页数：12

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