Hydrogen-induced hot workability in Ti-6Al-4V alloy

The effect of hydrogen on hot deformability of Ti-6Al-4V alloy was investigated by isothermal hot compression test with temperature of 800 ℃ and velocity of 0.1 mm/s. By optical microscopy （OM） and transmission electron microscopy （TEM）, the influence of hydrogen on the microstructural features was...

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Bibliographic Details
Published inTransactions of Nonferrous Metals Society of China Vol. 16; no. A03; pp. 2072 - 2076
Main Author 宗影影 单德彬 吕炎 郭斌
Format Journal Article
LanguageEnglish
Published School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China 01.12.2006
Subjects
再结晶作用
变形性
可加工性
钛合金
flow stress
hydrogen
microstructural evolution
Ti-6Al-4V alloy
hot workability
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ISSN1003-6326

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Summary:The effect of hydrogen on hot deformability of Ti-6Al-4V alloy was investigated by isothermal hot compression test with temperature of 800 ℃ and velocity of 0.1 mm/s. By optical microscopy （OM） and transmission electron microscopy （TEM）, the influence of hydrogen on the microstructural features was systematically examined including the morphology of a grain, volume fraction of a phase and dynamic recrystallization （DRX）. The flow stress shows an initial decrease but a later increase with the increase of hydrogen content. The minimum of peak compression flow stress is obtained when 0.2% hydrogen is added into the alloy. The hydrogen-induced softening of Ti-6Al-4V alloy may be that hydrogen induces the increase of proportion of soft β phase, the increase of DRX and the increase of extent of twins.
Bibliography:43-1239/TG
hot workability
flow stress
microstructural evolution
Ti-6Al-4V alloy：, hydrogen; flow stress; hot workability; microstructural evolution
Ti-6Al-4V alloy：, hydrogen
TG146.23
ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:1003-6326