Evolution of grain boundary and texture in TC11 titanium alloy under electroshock treatment
Evolution of grain boundary and texture in TC11 titanium alloy under electroshock treatment
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TC11钛合金电击处理晶界和织构的演变
DOI：
10.1016/j.jallcom.2022.163969
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发表时间：
2022-01
影响因子：
6.2
通讯作者：
Hua Lin
中科院分区：
文献类型：
--
作者：
Liu Chang;Yin Fei;Xie Lechun;Qian Dongsheng;Song Yanli;Wu Wenlin;Wang Liqiang;Zhang Lai-Chang;Hua Lin
利用电子背散射衍射（EBSD）和透射电镜（TEM）研究了TC11合金在电击处理后晶界的演变机制。TEM结果表明，EST后0.06s有大量的α马氏体（α M）相析出。EBSD结果表明，β相中的大角度取向差晶界（HAGB）所占比例从EST前的3.74%增加到EST后的11.15%，α相所占比例没有明显变化，这是由于次生α（α s）和β相的小角度取向差晶界（LAGB）向α/β相界在α → β相变过程中形成HAGB。α相HAGB的比例从EST前的23.16%增加到EST后的76.61%，这是由于LAGB在α/β相界面处聚集形成HAGB所致。β相HAGB中α相取向差角优先选择值由60 °和90 °左右变为30 °左右，α相织构分布均匀，EST后0.06 s最大织构强度为5.47
This work investigated the evolution mechanism of grain boundaries in TC11 alloy after electroshock treatment (EST) using electron back scatter diffraction (EBSD) and transmission electron microscopy (TEM). TEM results showed that abundant α martensite (αM) phase was precipitated after EST with 0.06 s. EBSD results indicated that the percentage of high angle misorientation grain boundaries (HAGBs) in β phase increased from 3.74% before EST to 11.15% after 0.04 s EST, without evident change in proportion of α phase, which resulted from the low angle misorientation grain boundaries (LAGBs) of secondary α (αs) and β phase migrated to the α/β phase boundaries to form HAGBs during the αsto β phase transformation. The proportion of HAGBs in α phase increased from 23.16% before EST to 76.61% after 0.06 s EST, caused by the accumulation of LAGBs at the α/β phase boundaries to form HAGBs. The values for misorientation angle preference selection of α phase located around 60° and 90° were changed to 30° in HAGBs of β phase, and the texture distribution of α phase was uniform with maximum intensity of 5.47 after EST by 0.06 s
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