Triaxial Constraint and Tensile Strength Enhancement in Brazed Joints

Cai, Xin; Gao, Yanfei; Wang, Xue; Zhang, Wei; Liu, Wei; Shen, Xinpu; Zhang, Wei; Yu, Zhenzhen; Feng, Zhili

doi:10.1007/s11661-020-05984-x

Title: Triaxial Constraint and Tensile Strength Enhancement in Brazed Joints

Journal Article · Sat Sep 05 00:00:00 EDT 2020 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-020-05984-x· OSTI ID:1661221

Cai, Xin ^[1]; Gao, Yanfei ^[2]; Wang, Xue ^[2]; Zhang, Wei ^[3]; Liu, Wei ^[4]; Shen, Xinpu ^[4]; Zhang, Wei ^[5]; Yu, Zhenzhen ^[6]; Feng, Zhili ^[3]

China Univ. of Petroleum, Qingdao (China); Univ. of Tennessee, Knoxville, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
China Univ. of Petroleum, Qingdao (China)
The Ohio State Univ., Columbus, OH (United States)
Colorado School of Mines, Golden, CO (United States)

A brazed joint consists of a low-melting point and thin interlayer sandwiched between the high-melting-point base materials, in which the interlayer strength is typically lower than that of the base material. When this butt-joined composite is loaded uniaxially in the direction perpendicular to the plane of the brazing layer, the tensile strength is found to be much higher than that of the braze. This seems to violate the iso-stress condition in such a butt-joint serial configuration. Furthermore, the stress triaxiality has been usually ascribed, but without a quantitative rationalization, as being responsible for this tensile strength enhancement. Here a complete finite element simulation has been conducted to study the dependence of triaxiality and strength enhancement on geometric and material parameters. Two asymptotic limit solutions (based on Bridgman and Xia–Shih solutions, respectively) have been identified to understand the simulation results. The critical role of void evolution has been revealed when making a quantitative comparison to available experiments. In addition, ductility of the brazed joint, which has not been fully addressed in literature, is investigated by the Gurson–Tvergaard–Needleman model.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office

Grant/Contract Number:: AC05-00OR22725; DMR-1809640; CMMI-1847630

OSTI ID:: 1661221

Journal Information:: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Vol. 51, Issue 11; ISSN 1073-5623

Publisher:: ASM InternationalCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 1 work

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