%0 Conference Paper
%A Ayob, F.
%A Hussain, P.
%A Awang, M.
%A Zoolfakar, M.R.
%A Abdullah, A.
%A Baharudin, B.A.
%A Abdul Rahim, A.A.
%D 2018
%F scholars:10443
%I Institute of Physics Publishing
%K Cast iron; Diffusion; Heat treatment; Tensile strength; Welding, Diffusion process; Diffusion welding; Elevated temperature; Heat treatment time; Lamellar graphite cast iron; Post heat-treatment; Post weld heat treatment; Thickness and hardness, Low carbon steel
%N 1
%R 10.1088/1757-899X/328/1/012001
%T Effect of post heat treatment on the microstructure and microhardness of diffusion coupled gray cast iron and low carbon steel
%U https://khub.utp.edu.my/scholars/10443/
%V 328
%X Experimental studies carried out on the joining of grey lamellar graphite cast iron to low carbon steel by diffusion welding techniques had successfully produced a few diffusion couples, despite facing some earlier failures. Although faced with some success, analysis on the diffusion couples showed voids and incomplete bond/joint at the interface of the joints while the tensile strength value was found to be low. In furtherance, the diffusion couples were then subjected to a post-weld heat treatment (PWHT) that allowed for further diffusion process to take place to remove the voids and complete the bond/weld. The results revealed microvoids and interface lines at the interfaces of the specimens treated at temperatures of 800°C, and becoming less visible at 900°C. At an elevated temperature of 1000°C, on longer treatment times, apparently these microvoids and interface lines had disappeared, and the bond/weld at the interfaces of the diffusional welded couples seemed to be more complete. Thus, heat treatment time and temperature were found to have a strong influence on the structure, thickness and hardness of the diffusion layer produced. © Published under licence by IOP Publishing Ltd.
%Z cited By 2; Conference of 3rd International Conference on Mechanical, Manufacturing and Process Plant Engineering 2017, ICMMPE 2017 ; Conference Date: 22 November 2017 Through 23 November 2017; Conference Code:135320