Analysis of fracture toughness in high Co-Ni secondary hardening steel using FEM

被引：31

作者：

Wang, Chenchong ^{[1
]}

Zhang, Chi ^{[1
]}

Yang, Zhigang ^{[1
]}

Su, Jie ^{[2
]}

Weng, Yuqing ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat, Minist Educ, Beijing 100084, Peoples R China

[2] Cent Iron & Steel Res Inst, Inst Struct Mat, Beijing 100081, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 646卷

基金：

中国国家自然科学基金;

关键词：

Austenite layer; Fracture toughness; Finite element method; DUAL-PHASE STEELS; MECHANICAL-PROPERTIES; ULTRAHIGH STRENGTH; MICROSTRUCTURE; EMBRITTLEMENT; BEHAVIOR;

D O I：

10.1016/j.msea.2015.08.003

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure and mechanical properties of ultrahigh strength steels (300M, Aermet100 and M54) were analyzed. The experiment results showed that the steels with austenite layers at the boundary of martensite laths had higher K-IC than those without austenite layers. Finite element method (FEM) was used to establish models based on the actual microstructure of the steels. Extended finite element method (XFEM) was used to study the crack path and crack growth rate. Contour integral method (CIM) was used to study the best thickness of austenite layer, the effect of crack propagation direction and the value of K-IC. According to the simulation results, 10-15 nm was the best thickness of austenite layer for the fracture toughness of the steels with martensite as matrix. The simulation results of normalized value of K-IC were close to the experimental results. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：1 / 7

页数：7

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