The small fatigue crack growth behavior of an AM60 magnesium alloy

Zhe Chen, Amit Shyam, Jack Huang, Ray F. Decker, Steve E. Lebeau, Carl J. Boehlert

Research output: Contribution to journalArticle

  • 4 Citations

Abstract

The effects of thermomechanical processing and subsequent heat treatment on the small fatigue crack growth (FCG) behavior of an AM60 (Mg-6.29Al-0.28Mn wt pct) alloy were evaluated. The effects of mechanical loading parameters, such as maximum stress and load-ratio, on the small FCG behavior were also determined. Maximum stress did not appear to affect the crack propagation rate of small cracks in the stress and crack size ranges considered. Materials with different microstructures and yield stresses, introduced by different processing conditions, showed similar crack growth rates at equivalent stress intensity factor ranges. The effect of load ratio on small crack growth rates was recorded. Fracture surface characterization suggested that the fatigue crack propagation mechanism was a mixture of transgranular and intergranular cracking. Porosity and other material defects played respective important roles in determining the fatigue crack initiation and propagation behavior.

LanguageEnglish (US)
Pages1045-1058
Number of pages14
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume44
Issue number2
DOIs
StatePublished - Feb 2013

Profile

magnesium alloys
Magnesium alloys
Fatigue crack propagation
Crack propagation
cracks
crack propagation
Loads (forces)
Cracks
Processing
Crack initiation
Stress intensity factors
Yield stress
stress intensity factors
Porosity
crack initiation
Heat treatment
Defects
Microstructure
heat treatment
porosity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys
  • Mechanics of Materials

Cite this

The small fatigue crack growth behavior of an AM60 magnesium alloy. / Chen, Zhe; Shyam, Amit; Huang, Jack; Decker, Ray F.; Lebeau, Steve E.; Boehlert, Carl J.

In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 44, No. 2, 02.2013, p. 1045-1058.

Research output: Contribution to journalArticle

Chen, Zhe ; Shyam, Amit ; Huang, Jack ; Decker, Ray F. ; Lebeau, Steve E. ; Boehlert, Carl J./ The small fatigue crack growth behavior of an AM60 magnesium alloy. In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 2013 ; Vol. 44, No. 2. pp. 1045-1058
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