TC4钛合金激光表面重熔层内拉伸变形$\{10\bar{1}2\}$孪晶形成机制及马氏体变体选择规律

杨朋飞, 孙磊, 孙奇, 杨志远, 赵元, 高英, 张嘉振

Formation Mechanism of $\{10\bar{1}2\}$ Twins and Selection Rule of Martensitic Variants During Tensile Deformation in TC4 Titanium Alloy Laser Surface Remelting Layer

YANG Pengfei, SUN Lei, SUN Qi, YANG Zhiyuan, ZHAO Yuan, GAO Ying, ZHANG Jiazhen

表4 WQ和WQ-LSR试样中原始β晶粒及其12个α变体的Euler角与面积占比

Table 4 Euler angles and area fractions of the prior β grain and twelve α variants in WQ and WQ-LSR samples

Grain/variant Euler angle Area fraction / % WQ WQ-LSR WQ WQ-LSR Prior β grain (319.7°, 177.7°, 95.1°) (55.2°, 85.3°, 272.0°) 100.00 100.00 V1 (269.6°, 88.5°, 176.5°) (190.2°, 91.9°, 170.0°) 5.88 8.70 V2 (89.6°, 91.5°, 352.9°) (10.2°, 88.1°, 359.5°) 5.90 28.50 V3 (179.6°, 91.8°, 356.2°) (100.4°, 85.2°, 352.8°) 8.26 1.75 V4 (359.6°, 88.2°, 173.2°) (280.4°, 94.8°, 176.7°) 6.43 0.75 V5 (314.4°, 42.7°, 85.0°) (237.1°, 49.8°, 82.1°) 7.10 25.49 V6 (134.4°, 137.3°, 84.4°) (57.1°, 130.2°, 87.3°) 11.74 2.46 V7 (227.0°, 135.2°,268.0°) (140.8°, 132.8°,258.3°) 7.15 12.61 V8 (47.0°, 44.8°, 261.4°) (320.8°, 47.2°, 271.2°) 12.82 1.23 V9 (42.3°, 134.7°, 81.5°) (330.3°, 136.8°, 91.7°) 7.52 6.32 V10 (222.3°, 45.3°, 88.0°) (150.3°, 43.2°, 77.8°) 8.58 1.74 V11 (134.8°, 47.3°, 264.5°) (53.0°, 40.3°, 267.8°) 8.76 8.22 V12 (314.8°, 132.7°, 265.0°) (233.0°, 139.7°, 261.7°) 9.86 2.23