High tensile ductility and strength in dual-morphology hierarchical nanolamellar-structured TiZr alloys
High tensile ductility and strength in dual-morphology hierarchical nanolamellar-structured TiZr alloys
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DOI：
10.1016/j.matlet.2014.05.204
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发表时间：
2014-09
影响因子：
3
通讯作者：
Zhibo Zhang;Guosheng Zhang;D. Guo;Ming Li;Yindong Shi;Xiaohong Li;Xiangyi Zhang
中科院分区：
文献类型：
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作者：
Zhibo Zhang;Guosheng Zhang;D. Guo;Ming Li;Yindong Shi;Xiaohong Li;Xiangyi Zhang
TiZr基多元合金经剧烈塑性变形和热退火后，获得了具有微米级等轴晶的纳米/超细片层组织。双相分级结构TiZr具有较高的抗拉强度σUTS~1500 MPa和塑性应变εf~ 7.2%，表现出高强度和高塑性的良好结合。大的延展性主要来自纳米/超细片层结构和粗晶粒，这有助于增强应变硬化。
A nano/ultrafine lamellar structure with micrometer-sized equiaxed grains has been produced in TiZr-based multicomponent alloys via severe plastic deformation followed by thermal annealing. The dual-morphology hierarchical structured TiZr shows a high ultimate tensile strengthσUTS~1500 MPa and a large plastic strainεf~7.2%, demonstrating a good combination of high strength and ductility. The large ductility mostly results from both the nano/ultrafine lamellar structure and coarse grains that contribute to enhanced strain hardening.