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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Effects of thermohydrogen treatment on microstructures
of α+β and β titanium alloy as-cast
ZHAO Yong-qing(赵永庆), CAO Xing-min(曹兴民), XI Zheng-ping(奚正平)

Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China

Abstract:The effects of thermohydrogen treatment on the microstructures of TC21 and Ti40 alloys as-cast were researched. The results show that the β phase content increases after charged hydrogen. Compound TixHy appears if H content reaches a certain content, which perfectly gathers on the grain-boundaries and/or dislocations and then diffuses into the grains. The microstructure of TC21 alloy after thermohydrogen treatment becomes fine and the best H content is 0.4% (mass fraction). However, the influence of thermohydrogen treatment on Ti40 microstructure is not obvious.

 

Key words: titanium alloy; thermohydrogen treatment; microstructure

ISSN 1672-7029
CN 43-1423/U

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