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Title: | Effect of post heat treatment on the microstructure and microhardness of diffusion coupled gray cast iron and low carbon steel |
Authors: | Ayob, F. Hussain, P. Awang, M. Zoolfakar, M.R. Abdullah, A. Baharudin, B.A. Abdul Rahim, A.A. |
Issue Date: | 2018 |
Publisher: | IOPScience |
Citation: | Ayob, F., Hussain, P., Awang, M., Zoolfakar, M. R., Abdullah, A., Baharudin, B. A., & Abdul Rahim, A. A. (2018). Effect of post heat treatment on the microstructure and microhardness of diffusion coupled gray cast iron and low carbon steel. IOP Conference Series: Materials Science and Engineering, 328(1). |
Abstract: | 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. |
Description: | This is an open access article distributed under the terms of the Creative Commons CC-BY license. This article is index by Scopus |
URI: | https://doi.org/10.1088/1757-899X/328/1/012001 https://iopscience.iop.org/article/10.1088/1757-899X/328/1/012001 https://www.scopus.com/record/display.uri?eid=2-s2.0-85044540522&doi=10.1088%2f1757-899X%2f328%2f1%2f012001&origin=inward&txGid=d1351e466dce7c1fed350b6df58cc061 http://ir.unikl.edu.my/jspui/handle/123456789/23201 |
ISSN: | 17578981 |
Appears in Collections: | Journal Articles |
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