Atomic-Scale Study on the Interaction Mechanism between Cracking and Typical Grain Boundaries in 15-5 PH Stainless Steel

被引：1

作者：

Li, Bei ^{[1
]}

Jin, Chunhui ^{[1
]}

Li, Guoqiang ^{[1
]}

Zhao, Jinhua ^{[1
,2
]}

Chen, Jinshan ^{[3
]}

Ma, Lifeng ^{[2
]}

Misra, R. Devesh Kumar ^{[4
]}

机构：

[1] Taiyuan Univ Sci & Technol, Sch Mat Sci & Engn, Taiyuan 030024, Peoples R China

[2] Taiyuan Univ Sci & Technol, Heavy Machinery Engn Res Ctr, Minist Educ, Taiyuan 030024, Peoples R China

[3] Nanjing Inst Technol, Coll Mat Sci & Engn, Nanjing 211167, Peoples R China

[4] Univ Texas El Paso, Dept Met Mat & Biomed Engn, Lab Excellence Adv Steel Res, 500 W Univ Ave, El Paso, TX 79912 USA

来源：

STEEL RESEARCH INTERNATIONAL | 2023年 / 94卷 / 05期

基金：

中国国家自然科学基金;

关键词：

15-5 PH stainless steel; crack-arresting mechanisms; grain boundaries; molecular dynamics; MOLECULAR-DYNAMICS SIMULATION; FATIGUE BEHAVIOR; MICROSTRUCTURE; PROPAGATION; STRENGTH; SPECIFICATION; TEMPERATURE;

D O I：

10.1002/srin.202200509

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In order to illuminate the hindering effects induced by grain boundaries on the propagation behavior of crack with respect to 15-5 PH stainless steel, interactions between propagated crack and typical grain boundaries, including the parent austenite grain boundary (PAGB), coincidence site lattice sigma 3 grain boundary (CSL sigma 3), packet grain boundary (PGB), and block grain boundary (BGB) are investigated at the atomic scale. Results indicate that the higher stress in the crack initiation (CI) stage and crack and grain boundary interaction (CGB) stage is required to drive the propagating crack in terms of the PAGB model compared to the other models, and the longest interaction time between propagated crack and established grain boundary is needed for the crack from the crack propagation (CP) stage to the CGB stage in the case of the PGB model. The PAGB and PGB are determined to be the most effective in hindering crack propagation in 15-5 PH stainless steel.

引用

页数：8