Effect of microstructure on tensile and compressive behavior of WE43 alloy in as cast and heat treated conditions

Chongchen Xiang, Nikhil Gupta, Paulo Coelho, Kyu Cho

Research output: Contribution to journalArticle

Abstract

The influence of heat treatment on the microstructure, tensile and compressive properties and failure mechanisms of WE43 alloy is studied. The eutectic phase is dissolved into the α-Mg phase and the grain size is refined in the heat treated alloy. Heat treatment improves the tensile yield and ultimate strengths by 40% and 53%, respectively. The compressive yield and ultimate strengths of heat treated alloy are also 55% and 23%, respectively, higher compared to the as-cast alloy. Compressive characterization is also conducted at high strain rates. The energy absorption capability of WE43-T5 specimens is higher than the as-cast WE43 specimens at all strain rates investigated in this work. Failure initiates with cracks in the eutectic phase in the as-cast alloy. These cracks grow through the grain to result in transgranular fracture. The absence of eutectic mixture in heat treated alloy results in grain boundary sliding and crack initiation at triple junctions. The crack propagation is delayed in the absence of eutectic precipitates, which improves the mechanical properties of the heat treated alloy.

Original languageEnglish (US)
Pages (from-to)74-85
Number of pages12
JournalMaterials Science and Engineering A
Volume710
DOIs
StatePublished - Jan 5 2018

Fingerprint

casts
eutectics
heat
microstructure
Microstructure
Eutectics
cast alloys
yield strength
strain rate
heat treatment
cracks
Strain rate
tensile properties
crack initiation
energy absorption
crack propagation
Heat treatment
Cracks
Grain boundary sliding
sliding

Keywords

  • High strain rate compression
  • Magnesium alloy
  • Microstructure
  • Rare earth alloying element
  • Tensile testing

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Effect of microstructure on tensile and compressive behavior of WE43 alloy in as cast and heat treated conditions. / Xiang, Chongchen; Gupta, Nikhil; Coelho, Paulo; Cho, Kyu.

In: Materials Science and Engineering A, Vol. 710, 05.01.2018, p. 74-85.

Research output: Contribution to journalArticle

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