Thermal Fatigue of Die-Casting Dies: An Overview

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Hassan, A. Abdulhadi and S. N., Aqida and M., Ishak and Mohammed, G. R. (2016) Thermal Fatigue of Die-Casting Dies: An Overview. In: MATEC Web of Conferences: The 3rd International Conference on Mechanical Engineering Research (ICMER 2015), 18-19 August 2015 , Zenith Hotel, Kuantan, Pahang, Malaysia. pp. 1-6., 74 (00032). ISSN 2261-236X

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Official URL: http://dx.doi.org/10.1051/matecconf/20167400032

Abstract

Coupled studies by experimental and numerical simulations are necessary for an increased understanding of the material behaviour as related to the interaction between the thermal and mechanical conditions. This paper focus on the mechanisms of thermal fatigue in the failure of dies and cores used in the die casting of aluminum alloys. The thermal fatigue resistance is expressed by two crack parameters which are the average maximum crack and the average cracked area. Samples of various types of H13 steel were compared with a standard H13 steel by testing under identical thermal fatigue cycles. To determine the thermal constraint developed in the sample during the test, a finite difference technique was used to obtain the temperature distribution, based on temperature measurements at the boundaries. The resulting stresses and strains were computed, and the strain calculated at the edge or weakest point of the sample was used to correlate the number of cycles to crack initiation. As the strain at the edge increased, the number of cycles to failure decreased. The influence of various factors on thermal fatigue behavior was studied including austenitizing temperature, surface condition, stress relieving, casting, vacuum melting, and resulfurization. The thermal fatigue resistance improved as the austenitizing temperature increased from 1750 to 2050ºF.

Item Type:Conference or Workshop Item (Lecture)
Uncontrolled Keywords:Aluminium alloys; air entrapment; die molten metal; materials
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Faculty of Mechanical Engineering
ID Code:15947
Deposited By: Noorul Farina Arifin
Deposited On:21 Dec 2016 13:52
Last Modified:22 Jan 2018 14:12

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