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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

NUMERICAL ASSESSMENT OF INTERFACIAL HEAT TRANSFER COEFFICIENT IN A MG SQUEEZE CASTING WITH VARIOUS SECTION THICKNESS BY POLYNOMINAL EXTRAPOLATION

Luyang Ren
Dept. of Mechanical, Automotive & Materials Engineering University of Windsor, 401 Sunset Ave., Windsor, Ontario N9B 3P4, Canada

Zhizhong Sun
Dept. of Mechanical, Automotive & Materials Engineering University of Windsor, 401 Sunset Ave., Windsor, Ontario N9B 3P4, Canada

Henry Hu
Dept. of Mechanical, Automotive & Materials Engineering University of Windsor, 401 Sunset Ave., Windsor, Ontario N9B 3P4, Canada

DOI: 10.1615/IHTC16.cms.023294
pages 1745-1752


KEY WORDS: Materials and foods processing, Manufacturing, Interfacial heat transfer coefficient, Squeeze casting, Magnesium alloy, Polynomial extrapolation

Abstract

A 5-step casting die with different cross section thicknesses as 2, 4, 8, 12, 20 mm was machined, and squeeze casting (SC) of Mg alloy AM60 was carried out in a 75-ton hydraulic press. The casting-die interfacial heat transfer coefficients (IHTC) at each step of the 5-step squeeze casting were determined based on experimental thermal histories data throughout the die and inside the casting which were recorded by type-K thermocouples. With measured temperatures, heat fluxes and IHTCs were calculated by the polynomial extrapolation method. The computed results reveal that the section thickness influences IHTC peak values significantly. The IHTC value for the thick step is much higher than that for the thin steps.

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