Effects of brazing parameters on the microstructure and tensile shear force of copper sheets using amorphous filler metal

Abstract

Abstract. In this research, the objective was to investigate and measure the microstructure, tensile shear force, and fracture surface behavior when copper sheets are brazed using Cu-Ni-Sn-P amorphous filler metal. In order to examine the microstructure and its properties, assessment of the Cu-Ni-Sn-P/copper brazed joints was conducted after furnace brazing under an argon atmosphere using specific parameters relating to temperature, holding time, and loading pressure. In order to assess the tensile shear force, tensile testing was carried out. All the joints exhibited sound bonding without voids or cracks, when brazing temperatures reached 680 °C, this resulted in a maximum value for tensile shear force of 696.325 N. The microstructure consisted of both Cu-rich solid solution and a (Cu, Ni)3P phase as a eutectic structure formed in the brazing joint, and then the Cu-rich solid solution was produced as a matrix region around the eutectic structure. Fracture analysis was conducted for brazed joints which showed the ductile fractures after the shear test.

Investigation on Strength and Microstructural Evolution of Porous Cu/Cu Brazed Joints Using Cu-Ni-Sn-P Filler

“…This dark phase apparently consists of Cu-P and Cu-Ni phase compounds. The EDS results obtained are in good agreement with previous studies on pure Cu joints brazed with a similar amorphous filler metal [27,28].…”

Analysis of Mechanical and Metallographic Properties on The Joining Between Aluminum and Brass by Using The Brazing Method

“…Using Cu-Ni-Sn-P amorphous filler metals, Jattakul & Kanlayasiri (2018) [23] investigated and measured the microstructure, tensile shear strength and surface fracture behaviour. When the brazing temperature reaches 680 °C, this results in a maximum tensile shear value of 696.325 N. Microstructure consists of a Cu-rich solid solution and (CuNi) 3 P as an eutectic structure formed during brazing, and then a Cu-rich solid solution is created around the eutectic structure as an area matrix.…”