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Strong and ductile beta Ti–18Zr–13Mo alloy with multimodal twinning
Materials Research Letters ( IF 8.6 ) Pub Date : 2019-03-27 , DOI: 10.1080/21663831.2019.1595763
Jinyong Zhang 1, 2, 3 , Fan Sun 4 , Zheng Chen 1 , Yang Yang 5 , Baolong Shen 1 , Ju Li 5 , Frédéric Prima 4
Affiliation  

Body-centred cubic (BCC) Ti–18Zr–13Mo (wt%) alloy displays excellent yield strength (≈800 MPa), stable hardening (rate > 1500 MPa) and uniform ductility >18%, resulting from multi-TWIP (multiple twinning-induced plasticity) strengthening effect. This multimodal mechanisms include micro-scale {332}<113> deformation twinning (DT), nano-scale {112}<111> DT and a rare {5 8 11}<135> DT mode. Martensitic phase transformation is completely suppressed and the sample stays a single-phase solid solution throughout the deformation. In situ electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) were used to characterize the multi-TWIP and dynamic Hall–Patch effect, with dislocation slip and large grain distortions at twin interfaces.



中文翻译:

具有多峰孪晶的强韧且延展性的βTi–18Zr–13Mo合金

多重TWIP(多次孪晶)产生的体心立方(BCC)Ti–18Zr–13Mo(wt%)合金具有出色的屈服强度(≈800MPa),稳定的硬化(速率> 1500 MPa)和均匀的延展性> 18%。诱导的可塑性)增强作用。这种多峰机制包括微观尺度{332} <113>变形孪生(DT),纳米尺度{112} <111> DT和罕见的{5 8 11} <135> DT模式。马氏体相变被完全抑制,样品在整个变形过程中保持单相固溶。原位电子背散射衍射(EBSD)和透射电子显微镜(TEM)用来表征多重TWIP和动态霍尔-帕特效应,在双界面处具有位错滑移和大晶粒变形。

更新日期:2019-03-27
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