Effect of casting over-pressure on the fatigue resistance of aluminum alloy A356-T6

M. A. Neri, David R Poirier, R. G. Erdmann

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The fatigue resistance of an Al-Si casting alloy (A356) solidified under pressures up to 20 atm and under a vacuum was investigated. Pressures of 10 and 20 atm mitigated microporosity in plate-castings, and this enhancement significantly improved fatigue resistance. Cooling rate during solidification, which affects the dendrite arm spacing (DAS), was also varied. Also studied were Sr-modification and the use of a flux to capture oxide-bifilms. Fatigue life increased as the maximum pore size decreased, which resulted from the over-pressures and/or a decrease in DAS. The use of flux in the mold and Sr-modification, especially when employed simultaneously, also increased fatigue life.

Original languageEnglish (US)
Title of host publicationTMS Annual Meeting
Pages275-282
Number of pages8
StatePublished - 2007
EventSHAPE CASTING: 2nd International Symposium - Orlando, FL, United States
Duration: Feb 25 2007Mar 1 2007

Other

OtherSHAPE CASTING: 2nd International Symposium
CountryUnited States
CityOrlando, FL
Period2/25/073/1/07

Fingerprint

overpressure
fatigue
Aluminum alloys
Casting
aluminum
Fatigue of materials
spacing
Fluxes
Microporosity
Dendrites (metallography)
solidification
Oxides
Pore size
Solidification
oxide
Vacuum
Cooling
cooling
effect

Keywords

  • Aluminum casting alloy
  • Fatigue
  • Microporosity
  • Pressure casting

ASJC Scopus subject areas

  • Geology
  • Metals and Alloys

Cite this

Neri, M. A., Poirier, D. R., & Erdmann, R. G. (2007). Effect of casting over-pressure on the fatigue resistance of aluminum alloy A356-T6. In TMS Annual Meeting (pp. 275-282)

Effect of casting over-pressure on the fatigue resistance of aluminum alloy A356-T6. / Neri, M. A.; Poirier, David R; Erdmann, R. G.

TMS Annual Meeting. 2007. p. 275-282.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Neri, MA, Poirier, DR & Erdmann, RG 2007, Effect of casting over-pressure on the fatigue resistance of aluminum alloy A356-T6. in TMS Annual Meeting. pp. 275-282, SHAPE CASTING: 2nd International Symposium, Orlando, FL, United States, 2/25/07.
Neri, M. A. ; Poirier, David R ; Erdmann, R. G. / Effect of casting over-pressure on the fatigue resistance of aluminum alloy A356-T6. TMS Annual Meeting. 2007. pp. 275-282
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