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

doi:10.11890/1006-7191-105-357

Abstract

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

Zhonggang SUN, Guoqing CHEN, Xuesong FU, Yaoqi WANG, Hongliang HOU,Wenlong ZHOU. TEM investigations on hydrogen induced phasetransformation in Ti-6Al-4V alloys[J]. Acta Metallurgica Sinica (English Letters), 2010, 23(5): 357-362.

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

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