Improvement of warm formability of Al-Mg sheet alloys containing coarse second-phase particles

Zhu, H., Dahle, A.K. and Ghosh, A.K. (2009) Improvement of warm formability of Al-Mg sheet alloys containing coarse second-phase particles. Science in China Series E: Technological Sciences, 52 1: 41-45. doi:10.1007/s11431-008-0275-6


Author Zhu, H.
Dahle, A.K.
Ghosh, A.K.
Title Improvement of warm formability of Al-Mg sheet alloys containing coarse second-phase particles
Journal name Science in China Series E: Technological Sciences   Check publisher's open access policy
ISSN 1006-9321
Publication date 2009-01
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s11431-008-0275-6
Volume 52
Issue 1
Start page 41
End page 45
Total pages 5
Editor Yan, L.
Place of publication Beijing, China
Publisher Zhongguo Kexue Zazhishe
Collection year 2010
Language eng
Subject 091207 Metals and Alloy Materials
C1
861205 Sheet Metal Products
Abstract Several alloying elements involving Zr, Cu, Zn and Sc were added to Al–Mg sheet alloys in order to obtain an excellent combination of high strength and good high-temperature formability. Microstructural examination showed that coarse intermetallic particles were formed in the microstructure and their amounts changed with variations of the alloying elements. During warm rolling of thermomechanical treatments prior to warm deformation, the coarse particles initiated cracks, decreasing the warm formability. For healing the crack damage and further improving the warm formability, a process of hot isothermal press was developed and optimized to the sheet alloys. With this process, the biaxial stretch formability at 350 was improved by 22% for an aluminum alloy containing a large amount of coarse particles.
Keyword Aluminum alloy
Microstructure
Second-phase particle
Hot isothermal press
High-temperature formability
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Thu, 03 Sep 2009, 08:58:10 EST by Mr Andrew Martlew on behalf of School of Mechanical and Mining Engineering