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首页> 中文期刊> 《中国高等学校学术文摘·机械工程》 >Cracking evolution behaviors of lightweight materials based on in situ synchrotron X-ray tomography: A review

Cracking evolution behaviors of lightweight materials based on in situ synchrotron X-ray tomography: A review

         
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摘要

Damage accumulation and failure behaviors are crucial concerns during the design and service of a critical component,leading researchers and engineers to thoroughly identifying the crack evolution.Third-generation synchrotron radiation X-ray computed microtomography can be used to detect the inner damage evolution of a large-density material or component.This paper provides a brief review of studying the crack initiation and propagation inside lightweight materials with advanced synchrotron three-dimensional (3D) X-ray imaging,such as aluminum materials.Various damage modes under both static and dynamic loading are elucidated for pure aluminum,aluminum alloy matrix,aluminum alloy metal matrix composite,and aluminum alloy welded joint.For aluminum alloy matrix,metallurgical defects (porosity,void,inclusion,precipitate,etc.) or artificial defects (notch,scratch,pit,etc.) strongly affect the crack initiation and propagation.For aluminum alloy metal matrix composites,the fracture occurs either from the particle debonding or voids at the particle/matrix interface,and the void evolution is closely related with fatigued cycles.For the hybrid laser welded aluminum alloy,fatigue cracks usually initiate from gas pores located at the surface or sub-surface and gradually propagate to a quarter ellipse or a typical semi-ellipse profile.

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  • 来源
    《中国高等学校学术文摘·机械工程》 |2018年第4期|461-481|共21页
  • 作者

    Y.Luo; S.C.Wu; Y.N.Hu; Y.N.Fu;

  • 作者单位

    State Key Laboratory of Traction Power, Southwest Jiaotong University,Chengdu 610031, China;

    State Key Laboratory of Traction Power, Southwest Jiaotong University,Chengdu 610031, China;

    State Key Laboratory of Traction Power, Southwest Jiaotong University,Chengdu 610031, China;

    Shanghai Synchrotron Radiation Facility, Shanghai 201204, China;

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