Paper Title:
Influence of Solution Heat Treatment on Microstructures of Semisolid Cast 7075 Aluminium Alloy
  Abstract

Influence of temperature and time of solution heat treatment on the microstructures of rheo-casting 7075 aluminium alloy produced by a novel technique, the Gas Induced Semi Solid (GISS) technique, had been investigated in this study. The microstructure of the as-cast specimens mainly consisted of matrix-α (Al) and grain boundary (GB)-eutectic phase (α-Al + Mg(Zn,Cu,Al)2). After solution heat treatment at 480 °C for 1 h, MgZn2 phase at the grain boundary was observed to have dissolved and coarse black particles of Mg2Si were observed to form in the matrix. In comparison, when solutionizing temperature of 450 °C was applied, it took 4 h of solution treatment time in order to dissolve the same portion of GB phase and MgZn2 phase, and coarse black particles of Mg2Si were found to form in the 8 h solution treated sample.

  Info
Periodical
Chapter
Chapter 5: Monitoring and Control of the Manufacturing Process
Edited by
Zhijiu Ai, Xiaodong Zhang, Yun-Hae Kim and Prasad Yarlagadda
Pages
371-374
DOI
10.4028/www.scientific.net/AMR.339.371
Citation
N. Mahathaninwong, S. Wisutmethangoon, T. Plookphol, J. Wannasin, "Influence of Solution Heat Treatment on Microstructures of Semisolid Cast 7075 Aluminium Alloy", Advanced Materials Research, Vol. 339, pp. 371-374, 2011
Online since
September 2011
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$32.00
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