Microstructure and tensile property of a novel AlZnMgScZr alloy additively manufactured by gas atomization and laser powder bed fusion
By Le Zhou, Hao Pan, Holden C. Hyer, Sharon Park, Yuanli Bai, B. McWilliams, Kyu C. Cho, Y. Sohn. Scripta Materialia, 2019
211 citations recorded by the source corpus.
Abstract Dense and crack-free Al-6Zn-2Mg (wt%) alloys with 1 wt% (Sc + Zr) addition were additively manufactured by laser powder bed fusion (LPBF) using gas atomized powders. As-built microstructure consisted of small equiaxed grains near the melt pool boundary and columnar grains between adjacent melt pools. Alloying of Sc + Zr promoted the formation of Al3(Sc,Zr) particles, which contributed to the grain refinement. The alloy exhibited outstanding tensile properties (i.e., 418 ± 3 MPa yield strength, 436 ± 3 MPa tensile strength and 11 ± 1% elongation) after heat treatment. The results demonstrate that high strength aluminum alloy can be fabricated by LPBF through alloy design and microstructural control.
Subfields: Aerospace Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/9d850335ff5b301440c30743383b671f9913273b
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Citations in the corpus
- 3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019, background): “[199] added 1% Sc and Zr to an Al-Zn-Mg alloy to eliminate cracking.”
- A review of Laser Powder Bed Fusion Additive Manufacturing of aluminium alloys: Microstructure and properties (2021, unknown): “[185] observed grain refinement due to the”
- Recent advances in hot tearing during casting of aluminium alloys (2020, background): “[119] added Sc and/or Zr to Al-Mg and Al-Mg-Zn alloys to eliminate the occurrence of hot tears through the formation of Al3(Sc, Zr) particles, which contributed to grain refinement.”