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

页码：294 / 306

页数：13

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