Ultrasonic fatigue performance of high temperature structural material Inconel 718 alloys at high temperature after UNSM treatment

被引：61

作者：

Amanov, A. ^{[1
]}

Pyun, Y. -S. ^{[1
]}

Kim, J. -H. ^{[1
]}

Suh, C. -M. ^{[2
]}

Cho, I. -S. ^{[3
]}

Kim, H. -D. ^{[1
]}

Wang, Q. ^{[4
]}

Khan, M. K. ^{[5
]}

机构：

[1] Sun Moon Univ, Dept Mech Engn, Chungnam 336708, South Korea

[2] Kyungpook Natl Univ, Sch Mech Engn, Taegu 702701, South Korea

[3] Mbrosia Co Ltd, Chungnam 336708, South Korea

[4] Sichuan Univ, Dept Civil Engn & Mech, Chengdu 610065, Peoples R China

[5] Sichuan Univ, Dept Mech & Engn Sci, Chengdu 610065, Peoples R China

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2015年 / 38卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

compressive residual stress; fatigue; Inconel; 718; alloy; surface modification; SURFACE; SUPERALLOY; BEHAVIORS; STEEL;

D O I：

10.1111/ffe.12330

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This study investigates the influence of ultrasonic nanocrystal surface modification (UNSM) technique on the mechanical characteristics and fatigue life of two types of annealed and aged Inconel 718 alloys. The mechanical properties of both UNSM-treated alloys were compared with the untreated specimens. The fatigue life of the untreated and UNSM-treated Inconel 718 alloy specimens was investigated by ultrasonic fatigue and rotary-bending fatigue tests. Results revealed that the UNSM-treated specimens exhibited longer fatigue life than those of the untreated specimens. The improvement in fatigue life is mainly attributed to the induced compressive residual stress induced in the subsurface by UNSM technique.

引用

页码：1266 / 1273

页数：8

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