Abstract
Microstructural and mechanical property evaluation of the joint region of direct diffusion-bonded joints made between duplex stainless steel SAE 2205 and medium-carbon steel AISI 1035 was studied for the samples processed at temperatures of 850, 900, 950 and 975°C, with holding time of 60 and 90-min and pressures of 20 and 30MPa. The energy dispersive X-ray analysis (EDAX) and X-ray diffraction analysis (XRD) confirmed the presence of interfacial reaction products, such as sigma phase and intermetallics at the interface. The shear strength of the samples processed at 975°C for 90min and at a pressure of 20MPa was 360.9MPa. Interestingly, the capability of the joint strength was not reduced as the result of formation of hard intermetallics because of diffusive and interfacial reactions.
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