首页|热加工过程中两相钛合金的α相与β相的协调演变

热加工过程中两相钛合金的α相与β相的协调演变

Evolution of coordination between α and β phases for two-phase titanium alloy during hot working

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为了研究两相钛合金中α和β相的协调演变行为,在不同条件下对合金进行热压缩和热处理.研究结果表明,α和β相之间的协调变形能力能影响显微组织演变的均匀性.当变形协调能力较好时,α相保持原来的片状结构,β相的再结晶程度较低.此时,尽管变形较大,但α相与两侧的β相仍保持Burgers取向关系,α和β相之间的原始相界面没有被破坏.随着变形协调能力的下降,片状α相的变形程度及β相的再结晶程度增加.此时,α相仅与一侧的β相保持Burgers取向关系,而与另一侧的β相取向产生偏移,偏移角度在10°以内.当变形协调能力较差时,α相和β相发生较为严重的偏移,界面位错程度增大,α相与周围的β相偏离Burgers取向关系.
The evolution of coordination between α and β phases for a two-phase titanium alloy was investigated. For this purpose, hot compression and heat treatment under different conditions were carried out. The results show that the ability of coordinated deformation between α and β phases can influence uniformity of microstructure evolution. Specifically, α phase maintains the lamellar structure and β phase has a low degree of recrystallization when the ability of coordinated deformation is good. In this case, α and β phases still maintain the BOR (Burgers orientation relationship), and their interface relationship is not destroyed even at large deformation. Both of the deformation extent of α lamellae and recrystallization degree of β phase increase with the decline of ability of coordinated deformation. The α phase only maintains the BOR with β phase on one side, while the uncoordinated rotation with the β phase on the other side occurs within 10°. The α and β phases rotate asynchronously when ability of coordinated deformation is poor. The degree of interface dislocation increases, and α and β phases deviate from the BOR.

coordination abilitytitanium alloyorientation relationshipglobularizationrecrystallization

徐建伟、曾卫东、周大地、贺胜通、贾润晨

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西北工业大学 材料学院 陕西省高性能精确成形技术与装备重点实验室,西安 710072

西北工业大学 材料学院 国防科技工业精密锻造与环轧技术创新中心,西安 710072

西北工业大学 凝固技术国家重点实验室,西安 710072

协调变形能力 钛合金 取向关系 球化 再结晶

authors are grateful for the financial supports from the National Natural Science Foundation of Chinaand the Natural Science Foundation of Shaanxi Province,China

519054362020JQ-156

2021

10.1016/S1003-6326(21)65740-0

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(11)
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