Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (5): 357-362.DOI: 10.11890/1006-7191-105-357

• 研究论文 • 上一篇    下一篇

TEM investigations on hydrogen induced phase transformation in Ti-6Al-4V alloys

Zhonggang Sun1,Yaoqi Wang1,Hongliang Hou1,wenlong zhou2,Guoqing CHEN1,Xuesong FU1   

  1. 1.
    2. School of Materials Science and Engineering, Dalian University of Technology,
  • 收稿日期:2010-03-25 修回日期:2010-04-22 出版日期:2010-10-25 发布日期:2010-10-14
  • 通讯作者: wenlong zhou

TEM investigations on hydrogen induced phasetransformation in Ti-6Al-4V alloys

Zhonggang SUN1, Guoqing CHEN1, Xuesong FU1, Yaoqi WANG2, Hongliang HOU2,Wenlong ZHOU1   

  1. 1 School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, China
    2 Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China
  • Received:2010-03-25 Revised:2010-04-22 Online:2010-10-25 Published:2010-10-14
  • Contact: Guoqing CHEN

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关键词: KEY WORDS Ti-6Al-4V alloys, Martensitic transformation, Hydrogenation, Hydride

Abstract: The TEM and HRTEM were utilized to investigate the phase transformation of hydrogenated Ti-6Al-4V alloys (0 wtpct-0.9 wt pct H) treated by annealing and quenching from β field. The results indicate that the orthorhombic α'' martensite and β phase appear progressively with the increase of hydrogen concentration. On the other hand, hydrides with sizes of 2-5 nm are observed in the specimens containing more than 0.6 wt pct hydrogen. The formation of α'' and twins can be attributed to the internal stress caused by solid solution of hydrogen and hydrides precipitation.

Key words: Ti-6Al-4V alloys, Martensitic transformation, Hydrogenation, Hydride