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Copyright of Journal of Functional Materials / Gongneng Cailiao is the property of Chongqing Functional Materials Periodical Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

利用液态金属冷却定向凝固技术,获得了柱晶 TWIP 钢试样,并对比研究了传统等轴晶与柱晶 TWIP 组织特征、基本力学行为及应变率敏感性。结果表明,定向凝固TWIP 试样随着抽拉速率的减小枝晶间距增加, 晶粒形貌简化。与传统试样相比,定向凝固试样沿着柱状晶纵向的综合力学性能明显提高,其中抽拉速率为 120 μm/s 试样断裂延伸率及强塑积分别提高了 30%及22.8%, 两者的延伸率及强塑积随着应变率的增加均有所降 低,而后者对应变率变化敏感性更低,意味着材料在遭受高速碰撞或冲击时,定向凝固试样仍能保持较高的能量 吸收特性。 [ABSTRACT FROM AUTHOR]