Investigation of the Copper Penetration and Joint Microstructure Observed in Low Alloyed Steels

Dheeraj Varanasi, Jozsef T. Szabo and Peter Baumli
 

Abstract

The present study is aimed at investigation of the microstructural quality of the joint achieved in low alloyed carbon steels. Two steels were used here, C45 (C 0.45%) and 42CrMo4 steel (1%Cr, 0.45%C) with a pure copper foil as the braze material. The experiments were conducted at 1100 °C in an inert gas environment. The results show good wettability and joint formation observed between the substrates. Dissolution of steel grain boundary by copper and the immediate grain separation were observed at the interface. Grooving of the grain boundaries and subsequent channel formation filled with liquid copper was achieved as evident from SEM-EDS micrographs. Besides the microstructure of the joint, penetration depth is also measured as function of time. Depth of penetration is seen varying as a function of cube root of holding time.

Published on: August 14, 2019
doi: 10.17756/nwj.2019-070
Citation: Varanasi D, Szabo JT, Baumli P. 2019. Investigation of the Copper Penetration and Joint Microstructure Observed in Low Alloyed Steels. NanoWorld J 5(3): 36-40.
 

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