宇航材料工艺2025，Vol.55Issue(2)：99-103,5.DOI:10.12044/j.issn.1007-2330.2025.02.013
3J40轴尖受压破坏过程及失效机理研究
Study on the Deformation Process and Failure Mechanism of 3J40 Shaft Tine Under Compressing Load
袁建宇 1褚洪杰 1王影 1逄锦程 1谢国君1
作者信息
- 1. 航天材料及工艺研究所,北京 100076
- 折叠
摘要
Abstract
3J40 alloy is a kind of high-strength,high-hardness,wear and corrosion-resistant alloy with high Cr and Al content used in precision instruments industry.This paper studies the deformation process and failure mechanism of 3J40 shaft tine under compressing load based on a failure analysis case in which 3J40 shaft tine and red corundum compress with each other.The crack and fracture morphology were investigated by stereoscopic microscope and scanning electron microscope(SEM).The stress distribution and failure mechanism were also analyzed for shaft tine serving state using finite element analysis.The results indicate that the spherical surface of 3J40 shaft tine was compressed to a plane under compressing load of red corundum surface,forming a Φ220 μm plain zone.The shaft tine fracture is ductile,and the shear stress peaks at the contacting rim of shaft tine and plane.Thereafter cracks form at the shear source and expand in axial direction and then turn around 90° at waist zone of the shaft tine.Theoretical estimation and finite element analysis were conducted based on Hertz contacting theory.The results show that large shear stress and strain exist in the 3J40 material which results in a shear failure mechanism.The results are significant for the performance optimization and structure design of shaft tine materials.关键词
3J40合金/轴尖/剪切破坏/塑性变形/有限元分析Key words
3J40 alloy/Shaft tine/Shear failure/Ductile deformation/Finite element analysis分类
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袁建宇,褚洪杰,王影,逄锦程,谢国君..3J40轴尖受压破坏过程及失效机理研究[J].宇航材料工艺,2025,55(2):99-103,5.
