The effect of texture on the very high cycle fatigue performance and deformation mechanism of rolled AZ31B magnesium alloys

Author:

Zhan Min12,Wang Xiangyu1,Dai Yajun1,Liu Chang1,Chen Yao1,Liu Yongjie12,Wang Chong1ORCID,Li Lang2,Wang Qingyuan23ORCID,He Chao12ORCID

Affiliation:

1. Key Laboratory of Deep Earth Science and Engineering, Ministry of Education, College of Architecture and Environment Sichuan University Chengdu China

2. Failure Mechanics & Engineering Disaster Prevention and Mitigation, Key Laboratory of Sichuan Province Sichuan University Chengdu China

3. School of Architecture and Civil Engineering Chengdu University Chengdu China

Abstract

AbstractRolling can result in anisotropy in the microstructure and mechanical properties of the sheet material. This study focuses on the very high cycle fatigue (VHCF) performance of magnesium alloys in the rolling direction (RD), normal direction (ND), and the bisecting angle between the ND and RD (ND–RD). The findings reveal that RD specimens demonstrate superior fatigue performance, while the ND specimens exhibit the lowest fatigue resistance. During the crack initiation stage, the primary influential factor is the maximum shear stress. Due to c‐axis alignment with ND direction in grains, the deformation mode for ND and RD specimens primarily involves first‐order pyramidal slip, while ND–RD specimens primarily undergo basal slip and prismatic slip. In early stable crack propagation, grain size and texture cause variations in the morphology of the rough area among the three directional specimens. Notably, the RD specimens show faster crack propagation during crack initiation than early stable propagation stage.

Funder

National Natural Science Foundation of China

Sichuan Province Science and Technology Support Program

Publisher

Wiley

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