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

被引：4
|
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.
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页数：14
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