Squeeze-cast Al-xZn-3Cu alloys exhibiting high strength, ductility, and wear resistance
- Authors
- Shin, Sang-Soo; Lee, Jae-Chul; Park, Ik-Min
- Issue Date
- 6-4월-2017
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Mechanical characterization; X-ray diffraction; Aluminum alloy; Casting; Rapid solidification; Grain refinement
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.690, pp.177 - 184
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
- Volume
- 690
- Start Page
- 177
- End Page
- 184
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/83770
- DOI
- 10.1016/j.msea.2017.02.103
- ISSN
- 0921-5093
- 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 (similar to 470 MPa) and ductility (similar to 9%) even without melt modification and optimized heat treatment. We attribute these improved properties to solution-hardened fine a-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 (similar to 564 degrees 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.
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