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Deformation-induced ambient temperature α-to-β phase transition and nanocrystallization in (α + β) titanium alloy

机译:(α+β)钛合金中形变诱导的环境温度从α到β的相变和纳米结晶

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摘要

Ambient temperature α-to-β phase transition and nanocrystallization in the aged Ti-25Nb-3Mo-3Zr-2Sn titanium alloy was achieved by surface mechanical attrition treatment (SMAT). The phase transition occurs at α/β interfaces and extends to α phase interiors with increasing strain. It is irreversible and diffusion controlled. The stress-induced increase of Gibbs energy and enrichment of Nb may cause a high order of lattice instability of the α phase adjacent to the α/β interfaces and compel the α phase to β phase. The presence of fine α needles in the aged alloy and the phase transition from α to β with increasing strain are viewed to play a crucial role in the subsequent nanostructuring.
机译:通过表面机械磨损处理(SMAT)实现了时效的Ti-25Nb-3Mo-3Zr-2Sn钛合金中环境温度从α到β的相变和纳米晶化。相变发生在α/β界面,并随着应变的增加而延伸到α相内部。它是不可逆的且受扩散控制。应力诱导的吉布斯能量的增加和Nb的富集可能导致与α/β界面相邻的α相的高阶晶格不稳定性,并迫使α相变为β相。时效合金中存在细小的α针,并且随着应变的增加,α到β的相变在随后的纳米结构中起着至关重要的作用。

著录项

  • 来源
    《Journal of Materials Research》 |2009年第11期|3439-3445|共7页
  • 作者

    Yong Han; Huaye Zhuang; Jian Lu;

  • 作者单位

    State-Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;

    State-Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;

    Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Kom, Kowloon, Hong Kong, China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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