Micromechanism of High-temperature Fatigue Properties of Inconel 718 Nickel-based Alloy Treated by Laser Peening

被引：1

作者：

Sheng, Jie ^{[1
,2
]}

Liu, Huixia ^{[3
]}

Lin, Youyu ^{[2
]}

Liu, Kai ^{[2
]}

Zhou, Guoyang ^{[2
]}

Wang, Yang

Agyenim-Boateng, Emmanuel ^{[4
]}

Huang, Shu ^{[3
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Jiangsu SUMEC Hardware Tools Co Ltd, 1 Xinghuo Rd, Nanjing 210032, Peoples R China

[3] Jiangsu Univ, Sch Mech & Engn, 301 Xuefu Rd, Zhenjiang 212013, Jiangsu, Peoples R China

[4] Univ Cape Coast, Dept Agr Engn, 1 Sch Bus Rd, Cape Coast, Ghana

来源：

JOURNAL OF LASER MICRO NANOENGINEERING | 2022年 / 17卷 / 01期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Inconel 718 nickel-based alloy; laser peening; high-temperature fatigue; microstructure; MECHANICAL SURFACE TREATMENTS; RESIDUAL-STRESS; MICROSTRUCTURE EVOLUTION; GRAIN-REFINEMENT; BEHAVIOR; RELAXATION; TI-6AL-4V; SPEED; LIFE;

D O I：

10.2961/jlmn.2022.01.2009

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The fatigue lives of IN718 alloy treated by laser peening (LP) were examined at high temperature. The microstructural response of the fatigue specimens was revealed. The results show that LP can refine the grain size, and produce new dislocation structures. The mechanical twins in the high-power LPed specimens can interact with other dislocations to refine the grains. A special "dislocation-precipitate" entanglement in the high-temperature fatigue LPed specimens at 700 degrees C was helpful to form a more effective pinning effect on the dislocation movement and thus preventing the initiation and propagation of fatigue cracks.

引用

页码：58 / 68

页数：11

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