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Indexed by:期刊论文

Date of Publication:2010-10-01

Journal:ACTA METALLURGICA SINICA-ENGLISH LETTERS

Included Journals:SCIE、EI、Scopus

Volume:23

Issue:5

Page Number:357-362

ISSN No.:1006-7191

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 wt pct-0.9 wt pct H) treated by annealing and quenching from beta field. The results indicate that the orthorhombic alpha '' martensite and beta 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 alpha '' and twins can be attributed to the internal stress caused by solid solution of hydrogen and hydrides precipitation.