Comparison of Dynamic Mechanical Properties of Non-Superheated and Superheated A357 Alloys

Mazlee, M. N., Shamsul, J. B., & Kamarudin, H. (2010). Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys. Kovove Mater, 48(1), 6.

12 Pages Posted: 25 May 2017

See all articles by Mazlee Mohd Noor

Mazlee Mohd Noor

Universiti Malaysia Perlis

J. B. Shamsul

Universiti Malaysia Perlis

H. Kamarudin

Universiti Malaysia Perlis

Date Written: May 25, 2017

Abstract

The influence of superheat treatment on the microstructure and dynamic mechanical properties of A357 alloys has been investigated. The study of microstructure was performed by the optical microscope. Dynamic mechanical properties (storage modulus, loss modulus, and damping capacity) were measured by the dynamic mechanical analyzer (DMA). Microstructure showed coarser and angular eutectic Si particles with larger α-Al dendrites in the non-superheated A357 alloy. In contrast, finer and rounded eutectic Si particles together with smaller and preferred oriented α-Al dendrites have been observed in the superheated A357 alloy. Dynamic mechanical properties showed an increasing trend of loss modulus and damping capacity meanwhile a decreasing trend of storage modulus at elevated temperatures for superheated and non-superheated A357 alloys. The high damping capacity of superheated A357 has been ascribed to the grain boundary damping at elevated temperatures.

Keywords: Dynamic properties, mechanical properties, damping, superheating, alloy

Suggested Citation

Mohd Noor, Mazlee and Jamaludin, Shamsul and Kamarudin, H., Comparison of Dynamic Mechanical Properties of Non-Superheated and Superheated A357 Alloys (May 25, 2017). Mazlee, M. N., Shamsul, J. B., & Kamarudin, H. (2010). Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys. Kovove Mater, 48(1), 6.. Available at SSRN: https://ssrn.com/abstract=2973887

Mazlee Mohd Noor (Contact Author)

Universiti Malaysia Perlis ( email )

School of Materials Engineering
Jejawi
Arau, 02600
Malaysia

Shamsul Jamaludin

Universiti Malaysia Perlis ( email )

School of Materials Engineering
Jejawi
Arau, 02600
Malaysia

H. Kamarudin

Universiti Malaysia Perlis

School of Materials Engineering
Jejawi
Arau, 02600
Malaysia

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