Evaluation of ductile tearing resistance of dual-phase DP 780 grade automotive steel sheet from essential work of fracture (EWF) tests

被引：14
|
作者：
Sarkar, Riddhi [1 ,2 ]
Chandra, Sayan Kalyan [1 ]
De, Partha Sarathi [1 ,3 ]
Chakraborti, P. C. [1 ,2 ]
Ray, S. K. [1 ]
机构：
[1] Jadavpur Univ, Met & Mat Engn Dept, Kolkata 700032, India
[2] Ctr Excellence Phase Transformat & Prod Character, Kolkata, India
[3] Indian Inst Technol Madras, Dept Engn Design, Chennai 600036, Tamil Nadu, India
来源：
THEORETICAL AND APPLIED FRACTURE MECHANICS | 2019年 / 103卷
关键词：
EWF method; DENT specimens; Dual-phase steel; CTOD; CTOA; TIP OPENING ANGLE; VALID LIGAMENT RANGE; DISPLACEMENT; CTOA;
D O I：
10.1016/j.tafmec.2019.102278
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The Essential Work of Fracture (EWF) method is adopted to study the ductile tearing resistance of Dual-Phase steel (DP 780) sheet of 1 mm nominal thickness. All the three characterizing parameters, namely EWF, estimate of crack tip opening displacement (CTOD) for crack initiation and crack tip opening angle (CTOA), that can be determined by the EWF testing paradigm have been examined. It is concluded that, of these three parameters, the CTOA estimated by this easy and rapid procedure is the best choice both in terms of statistical robustness and for potential application in integrity assessment.
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页数：9
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