The ductile-brittle transition behaviors of W/Ta multilayer composites

被引：5

作者：

Chen, C. ^{[1
,2
]}

Chen, Y. ^{[1
]}

Li, K. L. ^{[1
]}

Yang, S. Y. ^{[1
]}

Wang, J. ^{[1
]}

Wang, S. ^{[3
,5
]}

Mao, Y. R. ^{[1
,4
]}

Luo, L. M. ^{[1
,6
]}

Wu, Y. C. ^{[1
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

[2] Hefei Univ Technol, Intelligent Mfg Inst HFUT, Hefei 230009, Peoples R China

[3] Hefei Univ Technol, Inst Ind & Equipment Technol, Hefei 230009, Peoples R China

[4] Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany

[5] Hefei Univ Technol, Anhui Prov Key Lab Aerosp Struct Parts Forming Te, Hefei 230009, Peoples R China

[6] Hefei Univ Technol, Engn Res Ctr High Performance Copper Alloy Mat &, Minist Educ, Hefei 230009, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 946卷

基金：

中国国家自然科学基金;

关键词：

Tungsten; Multilayer composites; Mechanical property; Ductile-to-brittle transition temperature; Fracture mechanism; COLD-ROLLED TUNGSTEN; TENSILE PROPERTIES; MECHANICAL-PROPERTIES; STRENGTH; DEFORMATION; FRACTURE;

D O I：

10.1016/j.jallcom.2023.169377

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Tungsten (W) usually shows a high ductile-brittle transition temperature (DBTT). To overcome this short-coming, W-based multilayer composites have been designed. In this study, the ductile-brittle transition behaviors of W/Ta multilayer composites are investigated by uniaxial tensile and three-point bending tests under temperatures ranging from room temperature to 600 degrees C. For uniaxial tensile tests, the DBTT of composites bonded at 1000 degrees C is about 200 degrees C. However, the DBTT of composites bonded above 1200 degrees C is about 300 degrees C. When testing temperature is lower than the DBTT, both the strength and ductility are im-proved with increasing temperature. The composites exhibit the highest tensile strength at 300 degrees C. Meanwhile, the fracture modes of the composites, especially the W layer, changes dramatically at different testing temperature. For the composites bonded at 1000 degrees C, the fracture mechanism of W layer changes from brittle cleavage fracture to delamination fracture, and then to ductile shear fracture. For the com-posites bonded at a temperature above 1200 degrees C, the fracture mode of W layer evolves from intergranular fracture to cleavage fracture, then to shear fracture. Compared with uniaxial tensile tests, the DBTT is lower during three-point bending. (c) 2023 Elsevier B.V. All rights reserved.

引用

页数：14

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