Effect of basal texture on small crack behavior of magnesium alloy in very high cycle fatigue regime

被引：2

作者：

Liu, Chang ^{[1
]}

Dai, Yajun ^{[1
]}

Wang, Xiangyu ^{[1
]}

Chen, Yao ^{[1
]}

Li, Lang ^{[1
]}

Liu, Yongjie ^{[1
,2
]}

Wang, Qingyuan ^{[3
]}

He, Chao ^{[1
,2
,4
]}

机构：

[1] Sichuan Univ, Coll Architecture & Environm, Key Lab Deep Earth Sci & Engn, Minist Educ, Chengdu, Peoples R China

[2] Sichuan Univ, Key Lab Sichuan Prov, Failure Mech & Engn Disaster Prevent & Mitigat, Chengdu, Peoples R China

[3] Chengdu Univ, Sch Architecture & Civil Engn, Chengdu, Peoples R China

[4] Sichuan Univ, Key Lab Sichuan Prov, Failure Mech & Engn Disaster Prevent & Mitigat, Chengdu 610065, Peoples R China

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2023年 / 46卷 / 11期

基金：

中国国家自然科学基金;

关键词：

crack initiation; deformation mechanism; early crack propagation; magnesium alloy; very high cycle fatigue; HIGH-STRENGTH STEELS; EARLY PROPAGATION; EARLY GROWTH; INITIATION; INHOMOGENEITIES; MECHANISM; DEFECTS; STRESS; SLIP;

D O I：

10.1111/ffe.14110

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The behavior of small cracks in magnesium alloy is key to understanding very high cycle fatigue (VHCF), which is influenced by microstructure and deformation mechanism. This study explores how basal texture affects VHCF failure mechanisms in extruded magnesium alloys. Findings reveal that faceted and rough morphologies characterize fracture surfaces during crack initiation and early propagation, respectively. Basal texturing inhibits basal slipping during faceted-like crack initiation while compression twinning dominates deformation during early propagation, contributing to rough zones. Stress intensity factor and plastic zone size analysis indicates significant influence of basal texture on VHCF failure mechanisms but with limited effect on stable propagation.

引用

页码：4075 / 4088

页数：14

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