Squeeze-cast Al-xZn-3Cu alloys exhibiting high strength, ductility, and wear resistance

Sang Soo Shin, Jae-chul Lee, Ik Min Park

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this work, we determined the feasibility of fabricating Al-xZn-3Cu cast alloys with a balanced combination of strength, ductility, and wear resistance. We found that when >30 wt% Zn is added to Al, cast alloys with properties exceeding those of conventional Al-xSi-based cast alloy counterparts are formed. For example, the Al-40Zn-3Cu alloy, when cast under a pressure of 100 MPa, exhibits a high tensile strength (~470 MPa) and ductility (~9%) even without melt modification and optimized heat treatment. We attribute these improved properties to solution-hardened fine α-Al grains and a networked skeleton of grain boundary phases formed during rapid solidification. The Al-40Zn-3Cu alloy also exhibits a low melting temperature (~564 °C), better fluidity, and better wear resistance than currently used Al-xSi-based alloys; hence, the alloy developed herein would be suitable for producing high-integrity structural parts via squeeze casting.

Original languageEnglish
Pages (from-to)177-184
Number of pages8
JournalMaterials Science and Engineering A
Volume690
DOIs
Publication statusPublished - 2017 Apr 6

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high strength alloys
High strength alloys
cast alloys
ductility
wear resistance
Wear resistance
Ductility
casts
squeeze casting
rapid solidification
musculoskeletal system
integrity
tensile strength
heat treatment
grain boundaries
Squeeze casting
melting
Rapid solidification
Fluidity
Structural integrity

Keywords

  • A. Mechanical characterization
  • A. X-ray diffraction
  • B. Aluminum alloy
  • C. Casting
  • C. Rapid solidification
  • D. Grain refinement

ASJC Scopus subject areas

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

Cite this

Squeeze-cast Al-xZn-3Cu alloys exhibiting high strength, ductility, and wear resistance. / Shin, Sang Soo; Lee, Jae-chul; Park, Ik Min.

In: Materials Science and Engineering A, Vol. 690, 06.04.2017, p. 177-184.

Research output: Contribution to journalArticle

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