Pc. Zhang et al., Distribution of the composition and micromechanical properties of Be/316L stainless steel following diffusion bonding, SURF INT AN, 32(1), 2001, pp. 88-90
Joining of beryllium and 316L stainless steel by hot isostatic pressing (HI
P) with and without an interlayer was investigated. Metallurgical observati
on, scanning Auger microscopy (SAM) and nanoindentation were performed for
basic characterization of bonded joints. It is shown that the diffusion dep
th of Be into 316L stainless steel is much greater than that of Cr, Ni or F
e into beryllium, and it is similar to 400 mum. The nanohardness of the dif
fusion zone on the beryllium side increases sharply due to intermetallic co
mpounds, and the tensile strength of the Be/316L joint is < 10 MPa. For a B
e/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. Ch
ange of composition, mechanical property with distance in diffusion zone is
smooth, and the tensile strength increases to similar to 50 MPa. Copyright
(C) 2001 John Wiley & Sons, Ltd.