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Effect of severe plastic deformation on tensile and fatigue properties of fine-grained magnesium alloy ZK60

机译：严重塑性变形对细晶粒镁合金ZK60拉伸和​​疲劳性能的影响

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摘要

Complex wrought magnesium-based alloys suffer from poor ductility, strong yield asymmetry, and lower than desired fatigue performance. These unfavourable properties are exacerbated by the heterogeneity of the microstructure and strong texture forming in Mg alloys during conventional thermo-mechanical processing. For the user, severe plastic deformation (SPD) increases flexibility in tailoring the microstructures and selecting the properties to be emphasized in wrought Mg alloys. The effect of SPD by hot multiaxial forging and equal channel angular pressing on the formation of fine grain microstructure and on resultant mechanical properties is discussed. It is demonstrated that SPD is capable of substantial enhancement in ductility and tensile strength which gives rise to concurrent improvement of both low- and high-cycle fatigue properties. The main message of this overview is that the full potential for improving fatigue performance of Mg alloys can be taken advantage of by way of comprehensive understanding the role of the individual effects associated with the SPD-induced microstructures and textures.
机译：复杂的变形镁基合金的延展性差，屈服不对称性强且疲劳性能不理想。在常规的热机械加工过程中，镁合金中微观结构的不均匀性和强织构的形成加剧了这些不利的性能。对于用户而言，严重的塑性变形（SPD）增强了定制微结构和选择锻造Mg合金要强调的性能的灵活性。讨论了通过热多轴锻造和等通道角挤压SPD对细晶粒微结构的形成以及对所得机械性能的影响。已经证明，SPD能够显着提高延展性和拉伸强度，从而同时改善了低周疲劳性能和高周疲劳性能。本概述的主要信息是，通过全面了解与SPD诱导的微观结构和织构有关的各个作用的作用，可以充分利用改善镁合金疲劳性能的全部潜力。

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  • 来源
    《Journal of Materials Research》 |2017年第23期|4362-4374|共13页
  • 作者

    Alexei Vinogradov;

  • 作者单位

    Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology - NTNU, Trondheim 7491, Norway and Institute of Advanced Technologies, Togliatti State University, Togliatti 445020,Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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