High-temperature damage-tolerance of a hot-rolled brick-and-mortar Ti2Ni/TiNi composite

被引：3

作者：

Jia, Chen ^{[1
]}

Xiong, Zhiping ^{[1
,2
]}

Yang, Dezheng ^{[1
]}

Wang, Yangwei ^{[1
,2
]}

Cheng, Xingwang ^{[1
,2
]}

机构：

[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[2] Beijing Inst Technol, Tangshan Res Inst, Tangshan 063000, Peoples R China

来源：

MATERIALS LETTERS | 2022年 / 323卷

关键词：

Biomimetic; Brick-and-mortar; Composite materials; Toughness; TiNi; MECHANICAL CHARACTERIZATION; NACRE-LIKE;

D O I：

10.1016/j.matlet.2022.132555

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A nacre-like biomimetic Ti2Ni/TiNi brick-and-mortar composite, consisting of brittle Ti2Ni bricks homogeneously distributed in ductile TiNi mortars, is produced by hot rolling conventional laminated composite. When deformation temperature is between 25 and 500 ?, the brick-and-mortar composite essentially remains constants of fracture toughness (50 MPa.m1/2) and flexural strength (1250 MPa). This is consistent with zig-zag crack trajectories inherited from the nacre-like structure, providing a strong extrinsic toughening. Further increasing the deformation temperature up to 700 ? dramatically deteriorates the flexural strength because the TiNi mortars are strongly softened. Therefore, the Ti2Ni/TiNi brick-and-mortar composite exhibits a high temperature damage-tolerance up to 500 ?.

引用

页数：4

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