Fracture-toughness estimation from small-punch test in hydrogen exhibiting ductile and ductile-brittle fracture modes

被引：0
|
作者：
Hwang, Jin-Ha [1 ]
Seo, Ki-Wan [2 ]
Kim, Yun-Jae [2 ]
Kim, Ki-Seok [3 ]
机构：
[1] Pukyong Natl Univ, Dept Mech Design Engn, Pusan 48513, South Korea
[2] Korea Univ, Dept Mech Engn, Seoul 02841, South Korea
[3] POSCO, Global R&D Ctr 100, Incheon 21985, South Korea
来源：
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS | 2024年 / 103卷
关键词：
Combined ductile and brittle fracture mode; Ductile fracture mode; Fracture toughness estimation; Small punch test in hydrogen; X70 PIPELINE STEEL; HEAT-AFFECTED ZONE; MECHANICAL-PROPERTIES; STRESS INTENSITY; EMBRITTLEMENT; STRAIN; TRANSITION; BEHAVIOR;
D O I：
10.1016/j.euromechsol.2023.105193
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In this study, an energy-based fracture toughness estimation method based on a small-punch test in a hydrogen environment, exhibiting either ductile or combined ductile and brittle fracture modes is proposed. For the ductile fracture mode, the energy term due to gas pressure in the small-punch test in hydrogen environment is simply added to the existing energy-based fracture toughness estimation equation. For the combined ductile and fracture mode, modified equations for the plastic energy term are proposed to correct overestimation due to brittle cracking. The estimated fracture toughness values are shown to consistent with the published API X70 and X42 test data.
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页数：12
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