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| 冷轧 TA1钛板的塑性变形行为研究 |
| Plastic deformation behavior of cold-rolled TA1 titanium plate |
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| DOI： |
| 中文关键词: TA1钛板 冷轧压下率 塑性变形 孪晶 织构 |
| 英文关键词: TA1titaniumsheet cold-rollingreductionrate plasticdeformation twinning texture |
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| 中文摘要: |
| 借助电子背散射衍射技术(EBSD)和 X射线衍射仪(XRD)，研究了冷轧 TA1钛板在不同压下率下表层和中心层的微观组织、织构及形变孪晶的演变规律，分析了其塑性变形行为。结果表明，随着冷轧压下率的增大，表层和中心层的等轴晶粒均逐渐转变为纤维状组织。在中低变形率范围(0%~40%)，组织中观察到 {112ˉ2}< 112ˉ3>压缩孪晶和 {101ˉ2}< 101ˉ1>拉伸孪晶，孪晶数量则随着压下率的增加先增多后减少，在压下率为 20%时达到最大值。冷轧样品表层和中心层主要含有 {0001}基面织构和 {112ˉ0}面织构，以及 {011ˉ2}<1000>、{112ˉ5} < 11ˉ00>、{112ˉ3}< 11ˉ00>三种棱锥织构。随着压下率的增大， {0001}基面织构含量先增多后减少， {112ˉ0}柱面织构无明显变化，三种棱锥织构的含量则呈增加的趋势。整体而言，在冷轧过程中，中心层的织构组分含量变化较小，而表层的织构组分变化较大，且呈现逐步增强的趋势，最终表层和中心层织构的组分含量趋于一致。 |
| 英文摘要: |
| With the aid of electron backscatter diffraction(EBSD)and X-ray diffractometer(XRD)，the evolution of microstructure，texture，and deformation twinning on the surface and central layers of cold-rolled TA1 titanium sheets at different re-duction rates were investigated，and the plastic deformationbehaviors wereanalyzed.The results showthatwiththeincrease of cold-rolling reduction rate，the equiaxed grains on both the surface and central layers gradually transform into a fibrous structure. Within the low to moderate deformation range(0~40%)， the {112ˉ2}< 112ˉ3> compression twins and {101ˉ2}< 101ˉ1> tensile twins are observed，with the number of twins initially increasing and then decreasing as the reduction increases，reaching a maximum at 20% reduction rate. The surface and center layers of the cold-rolled samples mainly contain the {0001}and {112ˉ0} planetextures，andthreeprismatictextures，{011ˉ2}<1000>，{112ˉ5} < 11ˉ00>，{112ˉ3}< 11ˉ00> .With the increase of reduction rate，the content of {0001} plane texture increases initially and then decreases，while the content of {112ˉ0} plane texture shows no significant change. By contrast，the content of three prismatic texture components exhibits a tendency to increase. Overall，the texture component variation on the central layer is relatively small，while that on the surface layer exhibits significant changes，gradually increasing until the texture components of the surface and central layers became more uniform. |
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