Effect of two-cycle heat treatment on mechanical properties of ductile iron

A. Abdullah, and M.F. Idham, and A. Jaafar, and A.F. Zubair, and Mazlan Mohamed, (2013) Effect of two-cycle heat treatment on mechanical properties of ductile iron. Applied Mechanics and Materials, 393. pp. 79-82. ISSN 1662-7482

Official URL: http://dx.doi.org/10.4028/www.scientific.net/AMM.3...

Abstract

The aim of this study is to investigate the mechanical properties of ductile iron after treatment with two-cycle heat treatment processes which modified from austempering. The modified heat treatments have two stages holding temperature. Ductile iron was austenitized at 900˚C for an hour and followed by transferring the sample to other furnace which was set at different temperatures of i) 250 ˚C; ii) 300 ˚C; iii) 350 ˚C without quenching for 1.5 hours. Tensile (ASTM E8M), impact (ASTM-E23-1990) and Rockwell hardness tests were carried out to study the mechanical properties of the ductile iron. It was found that the sample which was heat treated using two-cycle heat treatment process at temperature of 250˚C contributed to better absorbing impact energy properties and hardness properties. Meanwhile, sample that heat treated at 350 ˚C has higher tensile strength.

Item Type: Non-Indexed Article
Subject Heading: Metals - Ductility
Subject Heading: Metals - Mechanical properties
Keywords: Ductile Iron - Heat Treatment - Mechanical Properties
Faculty: Faculty of Earth Sciences
Deposited By: Mr Mazlan Mohamed
Date Deposited: 29 Dec 2013 08:34
Last Modified: 23 Feb 2015 02:19
URI: http://umkeprints.umk.edu.my/id/eprint/2440

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