Hot formability of an A12009/20SiCwcomposite sheet

Kang Cheung Chan, G. Q. Tong, L. Gao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

Although high-strain-rate superplasticity of metal-matrix composites (MMCs) has attracted much research attention in the last decade, most researchers still use uni-axial tensile tests to investigate the formability of MMCs. In this paper, a new fully-computer-controlled superplastic bulge tester has been developed to study the hot formability of an aluminum-matrix composite sheet under complex stress states. Thin 20 vol.% SiC whisker-reinforced 2009 aluminum sheets (2009Al/20SiCw) with thicknesses of 2.0 and 2.3 mm were bulged at a constant polar strain-rate of 2.0 × 10-1s-1and at a optimum temperature of 808 K in elliptical dies with aspect ratios of 1:1, 4:3, 2:1, 8:3 and 4:1. The forming-limit diagram of the MMC was determined for the first time. It was shown that the forming limits increases with increasing sheet thickness, and that the general shape of the curve is different from that of conventional forming-limit curves.
Original languageEnglish
Pages (from-to)142-148
Number of pages7
JournalJournal of Materials Processing Technology
Volume74
Issue number1-3
DOIs
Publication statusPublished - 1 Jan 1998

Keywords

  • Aluminum-matrix composite
  • Gas-pressure forming
  • Hot formability

ASJC Scopus subject areas

  • Ceramics and Composites
  • Computer Science Applications
  • Metals and Alloys
  • Industrial and Manufacturing Engineering

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