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Title: An investigation to the effect of deformation-heat treatment cycle on the eutectic morphology and mechanical properties of a Thixocast A356 alloy

Abstract

The influences of deformation, heat treatment temperature and holding time on morphology and size distribution of Si containing eutectic phases of Thixocast Al-7Si-0.4 Mg alloy were investigated. The novel thermo-mechanical treatment consisted of initial cold working practice followed by a solution heat treatment at 540 deg. C for durations ranging from 2 min to 120 min followed by water quenching. Optical and scanning electron microscopes were used to study the influence of process parameters on microstructure evolution. Also, final mechanical properties were investigated using hardness test. The results indicate that, under appropriate conditions it is possible to achieve an ultrafine grain microstructure with the eutectic Si fibers fragmented and spheroidized in the entire microstructure. It was also found that, an agglomeration of sphrodized particles occurs and is governed by Ostwald ripening mechanism.

Authors:
 [1];  [1];  [2]
  1. School of Metallurgical and Materials Engineering, University of Tehran, Tehran (Iran, Islamic Republic of)
  2. Aerospace Manufacturing Technology Centre, Institute for Aerospace Research, National Research Council Canada, 5145 Decelles Avenue, Montreal, Quebec, H3T 2B2 (Canada)
Publication Date:
OSTI Identifier:
22066110
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 60; Journal Issue: 8; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AGGLOMERATION; ALUMINIUM BASE ALLOYS; COLD WORKING; DEFORMATION; EUTECTICS; HARDNESS; MAGNESIUM ALLOYS; MATERIALS TESTING; MICROSTRUCTURE; MORPHOLOGY; OPTICAL MICROSCOPY; PARTICLES; SCANNING ELECTRON MICROSCOPY; SILICON; SILICON ALLOYS; SOLUTION HEAT; THERMOMECHANICAL TREATMENTS

Citation Formats

Haghshenas, M, Zarei-Hanzaki, A, and Jahazi, M. An investigation to the effect of deformation-heat treatment cycle on the eutectic morphology and mechanical properties of a Thixocast A356 alloy. United States: N. p., 2009. Web. doi:10.1016/J.MATCHAR.2009.01.020.
Haghshenas, M, Zarei-Hanzaki, A, & Jahazi, M. An investigation to the effect of deformation-heat treatment cycle on the eutectic morphology and mechanical properties of a Thixocast A356 alloy. United States. https://doi.org/10.1016/J.MATCHAR.2009.01.020
Haghshenas, M, Zarei-Hanzaki, A, and Jahazi, M. 2009. "An investigation to the effect of deformation-heat treatment cycle on the eutectic morphology and mechanical properties of a Thixocast A356 alloy". United States. https://doi.org/10.1016/J.MATCHAR.2009.01.020.
@article{osti_22066110,
title = {An investigation to the effect of deformation-heat treatment cycle on the eutectic morphology and mechanical properties of a Thixocast A356 alloy},
author = {Haghshenas, M and Zarei-Hanzaki, A and Jahazi, M},
abstractNote = {The influences of deformation, heat treatment temperature and holding time on morphology and size distribution of Si containing eutectic phases of Thixocast Al-7Si-0.4 Mg alloy were investigated. The novel thermo-mechanical treatment consisted of initial cold working practice followed by a solution heat treatment at 540 deg. C for durations ranging from 2 min to 120 min followed by water quenching. Optical and scanning electron microscopes were used to study the influence of process parameters on microstructure evolution. Also, final mechanical properties were investigated using hardness test. The results indicate that, under appropriate conditions it is possible to achieve an ultrafine grain microstructure with the eutectic Si fibers fragmented and spheroidized in the entire microstructure. It was also found that, an agglomeration of sphrodized particles occurs and is governed by Ostwald ripening mechanism.},
doi = {10.1016/J.MATCHAR.2009.01.020},
url = {https://www.osti.gov/biblio/22066110}, journal = {Materials Characterization},
issn = {1044-5803},
number = 8,
volume = 60,
place = {United States},
year = {Sat Aug 15 00:00:00 EDT 2009},
month = {Sat Aug 15 00:00:00 EDT 2009}
}