Distortion in a 7xxx aluminum alloy during liquid phase sintering

Yuan, X. N., Huo, S. H., Schaffer, G. B. and Qian, M. (2014) Distortion in a 7xxx aluminum alloy during liquid phase sintering. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 45 2: 1010-1018. doi:10.1007/s11661-013-2009-z

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
UQ320588_OA.pdf Full text (open access) application/pdf 2.31MB 0

Author Yuan, X. N.
Huo, S. H.
Schaffer, G. B.
Qian, M.
Title Distortion in a 7xxx aluminum alloy during liquid phase sintering
Journal name Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science   Check publisher's open access policy
ISSN 1073-5623
1543-1940
Publication date 2014-02-01
Year available 2013
Sub-type Article (original research)
DOI 10.1007/s11661-013-2009-z
Open Access Status File (Author Post-print)
Volume 45
Issue 2
Start page 1010
End page 1018
Total pages 9
Place of publication New York, NY, United States
Publisher Springer New York
Language eng
Formatted abstract
The distortion in a sintered 7xxx aluminum alloy, Al-7Zn-2.5Mg-1Cu (wt. pct), has been investigated by sintering three rectangular bars in each batch at 893 K (620 °C) for 0 to 40 minutes in nitrogen, followed by air or furnace cooling. They were placed parallel to each other, equally spaced apart at 2 mm, with their long axes being perpendicular to the incoming nitrogen flow. Pore evolution in each sample during isothermal sintering was examined metallographically. The compositional changes across sample mid-cross section and surface layers were analyzed using energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy depth profiling, respectively. The two outer samples bent toward the middle one, while the middle sample was essentially distortion free after sintering. The distortion in the outer samples was a result of differential shrinkage between their outer and inner surfaces during isothermal sintering. The porous outer surface showed an enrichment of oxygen around the large pores as well as lower magnesium and zinc contents than the interior and inner surface of the same sample, while the inner surface was distinguished by the presence of AlN. The differential shrinkage was caused by different oxygen contents in local sintering atmosphere and unbalanced loss of magnesium and zinc between the outer and inner surfaces.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article published online September 25, 2013

 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 4 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Fri, 10 Jan 2014, 19:15:58 EST by Katie Gollschewski on behalf of CAST CRC Ltc