Fatigue and fracture toughness characteristics of laser rapid manufactured Inconel 625 structures

被引：105

作者：

Ganesh, P. ^{[1
]}

Kaul, R. ^{[1
]}

Paul, C. P. ^{[1
]}

Tiwari, Pragya ^{[2
]}

Rai, S. K. ^{[2
]}

Prasad, R. C. ^{[3
]}

Kukreja, L. M. ^{[1
]}

机构：

[1] Raja Ramanna Ctr Adv Technol, Laser Mat Proc Div, Indore 452013, MP, India

[2] Raja Ramanna Ctr Adv Technol, Indus Synchrotrons Utilizat Div, Indore 452013, MP, India

[3] Indian Inst Technol, Met & Mat Sci Dept, Bombay 400076, Maharashtra, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 29-30期

关键词：

Laser rapid manufacturing; Inconel; 625; Fatigue crack growth; Fractography; Transgranular fracture; J-integral test; COMPONENTS; CO2-LASER; CRACKING; POWER;

D O I：

10.1016/j.msea.2010.08.034

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fatigue crack growth and fracture toughness characteristics of laser rapid manufactured (LRMed) Inconel 625 compact tension specimens of thickness 12 and 25 mm were investigated. Fatigue crack propagation in all the specimens investigated in the stress intensity range (Delta K) of 14-38 MPa root m, exhibited stage II crack growth in Paris' regime with nearly same slopes of crack growth per cycle versus Delta K plot. Fatigue crack growth rates in the LRMed specimens of present study were found to be lower than the reported values for wrought Inconel 625 in the Delta K range of 14-24 MPa root m and above this range they tended to coincide. X-ray diffraction patterns of the fractured surfaces revealed that the crack propagated along the growth direction of the specimens which was predominantly along the (1 1 1) plane. The fracture toughness values (J(0.2)) for LRMed Inconel 625 specimens were found to be in the range of about 200-255 kJ/m(2). The LRMed specimens exhibited stable crack growth during the J-integral test. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：7490 / 7497

页数：8

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