Using the calculation of phase diagrams approach and Scheil solidification modeling,the Al-2.5Mg-1.0Ni-0.4Sc-0.1Zr alloy was designed,intentionally with an extraordinarily high cracking susceptibility,making it prime for solidification cracking during laser powder bed fusion.This study demonstrates the abil-ity to mitigate even the most extreme solidification cracking tendencies in aluminum alloys with only minor alloying additions of Sc and Zr,0.5 wt.％max.Furthermore,by employing a simple direct ageing heat treatment,good tensile mechanical properties were observed with a yield strength of 308 MPa,an ultimate tensile strength of 390 MPa,and a total elongation of 11％.

Holden Hyer;Le Zhou;Sharon Park;Thinh Huynh;Abhishek Mehta;Saket Thapliyal;Rajiv S.Mishra;Yongho Sohn

Department of Materials Science and Engineering,University of Central Florida,Orlando,FL,USA;Now Research Scientist,Oak Ridge National Laboratory,Oak Ridge,TN,USA;Now Assistant Professor,Marquette University,Milwaukee,WI,USA;Now PhD Candidate,Johns Hopkins University,Baltimore,MD,USA;Center for Friction Stir Processing,Department of Materials Science and Engineering,Advanced Materials and Manufacturing Processes Institute,University of North Texas,Denton,TX,USA

材料科学技术（英文版）

[1]Holden Hyer;Le Zhou;Sharon Park;Thinh Huynh;Abhishek Mehta;Saket Thapliyal;Rajiv S.Mishra;Yongho Sohn-.Elimination of extraordinarily high cracking susceptibility of aluminum alloy fabricated by laser powder bed fusion)[J].材料科学技术（英文版）,2022(08):50-58

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