Optimization of HIP bonding conditions for ITER shielding blanket first wall made from austenitic stainless steel and dispersion strengthened copper alloy

Optimum bonding conditions were studied on the Hot Isostatic Pressing (HIP) bonded joints of type 316L austenitic stainless steel and Dispersion Stren gthened Copper alloy (DSCu) for application to the ITER shielding blanket/f irst wall. HIP bonded joints were fabricated at temperatures in a 980-1050 degrees C range, and a series of mechanical tests and metallurgical observa tions were conducted on the joints. Also, bondability of two grades of DSCu (Glidcop Al-25(R) and Al-15(R)) with SS316L was examined in terms of mecha nical properties of the HIP bonded joints. From those studies it was conclu ded that the HIP temperature of 1050 degrees C was an optimal condition for obtaining higher ductility, impact values and fatigue strength. Also, SS31 6L/A1-15 joints showed better results in terms of ductility and impact valu es compared with SS316L/A1-25 joints. (C) 1998 Elsevier Science B.V. All ri ghts reserved.