摘要
ＳＴＲＡＩＮＩＮＤＵＣＥＤＳＴＲＵＣＴＵＲＥＴＲＡＮＳＩＴＩＯＮＩＮＨＯＴＤＥＦＯＲＭＥＤγ＋αＤＵＡＬＰＨＡＳＥＴＩＴＡＮＩＵＭＡＬＵＭＩＮＩＤＥ①ＣｈｅｎＧｕｏｌｉａｎｇａｎｄＷａｎｇＪｉｎｇｕｏＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙｆｏｒＡｄｖ...
Strain induced structure transition (SIST) during hot deformation in TiAl alloy was investigated by highresolution transmission electron microscopy(TEM). Various nonequilibrium asymmetrical twin boundaries with a large number of ledges were found. Special nonequilibrium tilt and asymmetrical γ/α interfaces were also illustrated. The normal crystal relation between γ and α can be changed. The 1/3 Frank partial dislocations often appear at these nonequilibrium interfaces. It was also reported that the strain induced phase transitions, including γ→α, α→γ and γ→9R structure, commonly occur during hot deformation; the strain induced phase transitions are closely related to interface structure. The dislocation reactions and mechanisms for SIST were discussed.
出处
《中国有色金属学会会刊：英文版》
CSCD
1998年第2期2-13,共12页
Transactions of Nonferrous Metals Society of China
