中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 17 Special 1 November 2007 |
Effects of thermohydrogen treatment on microstructures
of α+β and β titanium alloy as-cast
of α+β and β titanium alloy as-cast
（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
