Acoustic emission during fracture toughness tests of SA333 Gr.6 steel

被引：24
|
作者：
Mukhopadhyay, C. K. [1 ]
Sasikala, G. [1 ]
Jayakumar, T. [1 ]
Raj, Baldev [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Kalpakkam 603102, Tamil Nadu, India
来源：
ENGINEERING FRACTURE MECHANICS | 2012年 / 96卷
关键词：
Acoustic emission; Fracture toughness; SA333; Gr.6; steel; Stretch zone height; Blunting line equation; CRACK IDENTIFICATION; TENSILE; INITIATION;
D O I：
10.1016/j.engfracmech.2012.08.004
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A new approach for determining initiation fracture toughness J(i) has been developed based on acoustic emission (AE) and has been tested and validated on a SA333 Gr.6 steel. The J(i) values thus determined are in close agreement with those obtained from both ASTM A-15 prescription and stress zone height (SZH) measurements using a constraint factor M=4. This confirms the use of higher values of M (>2) in the blunting line equation J=M sigma(gamma)Delta a where M is the slope of the blunting line, sigma(gamma) is the effective yield strength, and Delta a is the crack extension. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：294 / 306
页数：13
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