Abstract In this work, the texture development in Al-4%Mg alloy sheet material under high strain rate (HSR) tensile deformation at 3.1 × 103 s−1 is studied using split Hopkinson tension bar test. Quantitative analysis of texture evolution for three different strain levels is carried out through strain mapping using digital image correlation and subsequent characterization using X-ray diffraction. Critical comparisons to the texture development in the sample deformed at quasi-static rate are made concurrently. The results show that Cube and Copper components strengthen upon tensile deformation under both the loading rates. However, the characteristics of lattice rotation, rotation path, lattice rotation rate and strength of texture components under HSR deformation are significantly different from that under quasi-static loading. Although the deformation texture developed at HSR is relatively weak, Copper component is noted to evolve sharply amongst other texture components. Further, the electron backscatter diffraction measurements reveal that the dislocation density and intragranular misorientation developed under HSR tension are relatively lower than at quasi-static rate for comparable strains. The inclusive analysis of results obtained reveals that texture weakening in Al-Mg alloy under HSR tension occurs as a result of relatively higher strain hardening and absence of dynamic strain aging.

中文翻译：

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高应变率张力下铝镁合金织构发展的动力学

摘要 在这项工作中，Al-4%Mg 合金板材在 3.1 × 103 s-1 的高应变率 (HSR) 拉伸变形下的织构发展使用分裂霍普金森拉杆试验进行了研究。通过使用数字图像相关性的应变映射和使用 X 射线衍射的后续表征，对三种不同应变水平的纹理演变进行定量分析。同时对以准静态速率变形的样品中的纹理发展进行关键比较。结果表明，在两种加载速率下，Cube 和 Copper 组件在拉伸变形时都会增强。然而，HSR变形下的晶格旋转特性、旋转路径、晶格旋转速率和纹理成分强度与准静态加载下的有显着差异。尽管在高铁形成的变形织构相对较弱，但注意到铜组分在其他织构组分中急剧演变。此外，电子背散射衍射测量表明，对于可比较的应变，在 HSR 张力下产生的位错密度和晶内取向差相对低于准静态速率。对所得结果的综合分析表明，铝镁合金在 HSR 张力下的织构减弱是由于相对较高的应变硬化和没有动态应变时效的结果。电子背散射衍射测量表明，对于可比较的应变，在 HSR 张力下产生的位错密度和晶内错误取向相对低于准静态速率。对所得结果的综合分析表明，铝镁合金在 HSR 张力下的织构减弱是由于相对较高的应变硬化和没有动态应变时效的结果。电子背散射衍射测量表明，对于可比较的应变，在 HSR 张力下产生的位错密度和晶内错误取向相对低于准静态速率。对所得结果的综合分析表明，铝镁合金在 HSR 张力下的织构减弱是由于相对较高的应变硬化和没有动态应变时效的结果。