Investigation of the fatigue crack propagation behaviour in the Al alloy/Hybrid MMC Bi-layer material

2017 International Conference on Materials and Intelligent Manufacturing

材料科学;机械制造

Asif Iqbal, A.K.M.^1 ; Arai, Yoshio^2

Faculty of Manufacturing Engineering, University Malaysia Pahang, Pekan, Pahang

26600, Malaysia^1

Division of Mechanical Engineering and Science, Saitama University, Shimo-okubo, 255, Sakura-ku, Saitama

338-8570, Japan^2

关键词: Bi-material;    Crack retardation;    Fatigue loadings;    Interfacial debonding;    Particle fracture;    Replica technique;    Stress intensity factor range;    Three-point bending fatigue tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/244/1/012013/pdf
DOI  :  10.1088/1757-899X/244/1/012013

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this study, the fatigue crack propagation behaviour in the Al alloy-hybrid MMC bi-material system has been investigated. Three-point bending fatigue test is carried out on the Shimadzu servopulser machine. The plastic replica technique is used to observe the crack growth during cyclic loading. The crack growth rate is analyzed at different stress intensity factor range, ΔK. The experimental results showed that the crack growth decelerates in the MMC layer side and maximum crack retardation occurs on the boundary of the bi-material system. Near the boundary of the bi-material, the crack tip becomes curved, which reduces the crack growth rate in the vicinity of the boundary of the bi-material even at higher ΔK. The particle-matrix interfacial debonding, as well as particle fracture, is observed in the hybrid MMC layer during fatigue loading.