DEFORMATION BEHAVIORS OF [110] AND [112] ORIENTED β-Sn SINGLE CRYSTALS
DEFORMATION BEHAVIORS OF [110] AND [112] ORIENTED β-Sn SINGLE CRYSTALS
复制标题
DOI：
--
复制
发表时间：
2008-12
影响因子：
2.3
通讯作者：
Liu Jiangtao;Wang Zhongguang;Shang Jianku
中科院分区：
文献类型：
--
作者：
Liu Jiangtao;Wang Zhongguang;Shang Jianku
研究了(110)和(112)取向的锡单晶在不同温度和应变速率下的变形行为。结果表明，(110)和(112)取向之间存在一定的差异。(110)取向样品的应变速率敏感指数m≈为0.133，应变硬化指数n≈为0.54，应变激活能Q≈为35kJ/≈，变形为多滑移。而(112)取向样品具有较低的应变速率敏感指数m≈0.108，较低的应变硬化指数n≈0.46，激活能Q≈52kJ/≈，并通过交叉滑移和孪晶共同变形。第一个激活的滑移系为(110)取向的{010}h100i。临界分辨剪应力(CRSS)为3.1 Mpa，与温度有关。根据活化能和滑移观测，变形过程受交叉滑移控制。
Deformation behaviors of (110) and (112) oriented Sn single crystals were investigated under different temperatures and strain rates. It is shown that there are some differences between (110) and (112) orientations. (110) oriented sample has the higher strain rate sensitivity exponent m≈0.133, strain hardening exponent n≈0.54, activation energy Q≈35 kJ/mol and deforms through multiple- slip. While (112) oriented sample has the lower strain rate sensitivity exponent m≈0.108, lower strain hardening exponent n≈0.46, activation energy Q≈52 kJ/mol and deforms through cross-slip and twins together. The first activated slip system is {010}h 100i in (110) orientation. The critical-resolved shear stress (CRSS) is 3.1 MPa which is depended on temperature. Deformation process is controlled by the cross-slip according to the activation energy and slip observation.