Submitted on: 30 November 2011.
Revised on: 24 March 2012.
Accepted on: 23 April 2012.
___________________INTERNATIONAL JOURNAL OF CAST METALS RESEARCH
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Submitted on: 17 March 2010.
Revised on: 18 May 2010.
Accepted on: 10 June 2010.
___________________INTERNATIONAL JOURNAL OF CAST METALS RESEARCH
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http://reply.papertrans.cn/2/132/13130/13130-35.png
Submitted on: 27 September 2016.
Revised on: 30 October 2016.
Accepted on: 17 November 2016.
___________________INTERNATIONAL JOURNAL OF CAST METALS RESEARCH