Low-temperature deformation of single crystals of a DO19 compound with an off-stoichiometric composition (Ti-36·5 at.% Al)
Low-temperature deformation of single crystals of a DO19 compound with an off-stoichiometric composition (Ti-36·5 at.% Al)
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DOI：
10.1080/01418619408242246
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发表时间：
1994-06
影响因子：
1.6
通讯作者：
H. Inui;Y. Toda;Y. Shirai;M. Yamaguchi
中科院分区：
文献类型：
--
作者：
H. Inui;Y. Toda;Y. Shirai;M. Yamaguchi
摘要：研究了一种非化学计量组成Ti-36·5 at的DO19化合物的变形行为。在- 196°C到室温的压缩温度下，研究了% Al作为取向的函数。{1100} < 1120 >棱镜滑移和(0001)< 1120 >基滑移的临界分解剪应力（CRSS）随温度的降低而增大。在- 196°C时，由棱镜滑移引起的位错有沿螺杆取向排列的趋势，但随着温度的升高，这种趋势变得不那么明显，因此在室温下，这些位错不一定沿着任何特定的晶体取向排列。{1121} < 1126 >锥体滑移的CRSS在温度T min为- 196 ~ - 100℃时，CRSS-温度曲线最小。在温度低于tmin时，大多数2c + a位错呈螺旋位错，CRSS随温度降低而增加，而在温度高于tmin时，CRSS随温度升高而异常增加。
Abstract Deformation behaviour of a DO19, compound with an off-stoichiometric composition of Ti-36·5 at.% Al has been studied as a function of orientation at temperatures from −196°C to room temperature in compression. The critical resolved shear stress (CRSS) for {1100} 〈11 20〉 prism slip and (0001)〈1120〉 basal slip increases with decreasing temperature. a dislocations introduced by prism slip have a tendency to align along their screw orientation at −196°C, but the tendency becomes less marked with increasing temperature so that at room temperature these dislocations do not necessarily align along any particular crystallographic orientations. The CRSS for {1121} 〈1126〉 pyramidal slip shows a minimum in the CRSS-temperature curve at a temperature T min between −196 and −100°C. Most 2c + a dislocations are in screw orientation at temperatures below T min where the CRSS increases with decreasing temperature, whereas at temperatures above T min, where the CRSS anomalously increases with increasing temperatu...