Premium
Distribution of the composition and micromechanical properties of Be/316L stainless steel following diffusion bonding
Author(s) -
Zhang Pengcheng,
Bai Bin,
Shen Liang,
Zhou Juesheng
Publication year - 2001
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.1012
Subject(s) - materials science , intermetallic , nanoindentation , beryllium , metallurgy , hot isostatic pressing , diffusion , ultimate tensile strength , joint (building) , diffusion bonding , composite material , alloy , chemistry , physics , thermodynamics , architectural engineering , organic chemistry , engineering
Joining of beryllium and 316L stainless steel by hot isostatic pressing (HIP) with and without an interlayer was investigated. Metallurgical observation, scanning Auger microscopy (SAM) and nanoindentation were performed for basic characterization of bonded joints. It is shown that the diffusion depth of Be into 316L stainless steel is much greater than that of Cr, Ni or Fe into beryllium, and it is ∼400 µm. The nanohardness of the diffusion zone on the beryllium side increases sharply due to intermetallic compounds, and the tensile strength of the Be/316L joint is <10 MPa. For a Be/Cu/316L joint, a Cu interlayer blocks the diffusion of Fe into Be, but Ni is gathered at the Cu/316L interface and a crack is formed at this stress field. For a Be/Cu/Ni/316L joint, the diffusion depth increases further. Change of composition, mechanical property with distance in diffusion zone is smooth, and the tensile strength increases to ∼50 MPa. Copyright © 2001 John Wiley & Sons, Ltd.