{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T04:54:14Z","timestamp":1787028854466,"version":"build-2736575974"},"reference-count":36,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,4,3]],"date-time":"2025-04-03T00:00:00Z","timestamp":1743638400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the National Key R&amp;D Program of China","award":["2022YFB3403703"],"award-info":[{"award-number":["2022YFB3403703"]}]},{"name":"the National Key R&amp;D Program of China","award":["2024YFTX0081"],"award-info":[{"award-number":["2024YFTX0081"]}]},{"name":"the National Key R&amp;D Program of China","award":["52204391"],"award-info":[{"award-number":["52204391"]}]},{"name":"the National Key R&amp;D Program of China","award":["2025A04J1654"],"award-info":[{"award-number":["2025A04J1654"]}]},{"name":"the Key R&amp;D Project of Sichuan Provincial Science and Technology Program","award":["2022YFB3403703"],"award-info":[{"award-number":["2022YFB3403703"]}]},{"name":"the Key R&amp;D Project of Sichuan Provincial Science and Technology Program","award":["2024YFTX0081"],"award-info":[{"award-number":["2024YFTX0081"]}]},{"name":"the Key R&amp;D Project of Sichuan Provincial Science and Technology Program","award":["52204391"],"award-info":[{"award-number":["52204391"]}]},{"name":"the Key R&amp;D Project of Sichuan Provincial Science and Technology Program","award":["2025A04J1654"],"award-info":[{"award-number":["2025A04J1654"]}]},{"name":"the National Natural Science Foundation of China","award":["2022YFB3403703"],"award-info":[{"award-number":["2022YFB3403703"]}]},{"name":"the National Natural Science Foundation of China","award":["2024YFTX0081"],"award-info":[{"award-number":["2024YFTX0081"]}]},{"name":"the National Natural Science Foundation of China","award":["52204391"],"award-info":[{"award-number":["52204391"]}]},{"name":"the National Natural Science Foundation of China","award":["2025A04J1654"],"award-info":[{"award-number":["2025A04J1654"]}]},{"name":"the Guangzhou Fundamental Research Program","award":["2022YFB3403703"],"award-info":[{"award-number":["2022YFB3403703"]}]},{"name":"the Guangzhou Fundamental Research Program","award":["2024YFTX0081"],"award-info":[{"award-number":["2024YFTX0081"]}]},{"name":"the Guangzhou Fundamental Research Program","award":["52204391"],"award-info":[{"award-number":["52204391"]}]},{"name":"the Guangzhou Fundamental Research Program","award":["2025A04J1654"],"award-info":[{"award-number":["2025A04J1654"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>This study explored the effects of T5 and T6 heat treatments on the microstructure and tensile properties of a laser powder bed fusion (LPBF)-fabricated Al\u2013Mn\u2013Mg\u2013Sc\u2013Zr alloy. The as-built condition exhibited a bi-modal grain structure of equiaxed and columnar grains. Specimens after T5 heat treatment also had a bi-modal microstructure with slight grain growth and the precipitation of secondary Al3Sc, which enhanced the yield strength via precipitation hardening but reduced ductility. In contrast, T6 treatment triggered recrystallization, and the microstructure was only coarse equiaxed \u03b1-Al grains. This microstructure change was accompanied by coarsened primary Al3X and Al6(Mn, Fe) precipitates, partial Mg2Si dissolution, and significant secondary Al3Sc particle growth. Consequently, T6-treated specimens showed lower strength than their T5 counterparts and the poorest ductility due to brittle fracture induced by the stress concentration effect of coarse precipitates at grain boundaries.<\/jats:p>","DOI":"10.3390\/ma18071638","type":"journal-article","created":{"date-parts":[[2025,4,4]],"date-time":"2025-04-04T03:36:45Z","timestamp":1743737805000},"page":"1638","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Effect of Heat Treatment on Microstructure and Tensile Property of Laser-Powder-Bed-Melted Al\u2013Mn\u2013Mg\u2013Sc\u2013Zr Alloy"],"prefix":"10.3390","volume":"18","author":[{"given":"Zhiqiang","family":"Cao","sequence":"first","affiliation":[{"name":"Center for Instrumental Analysis, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui","family":"Yin","sequence":"additional","affiliation":[{"name":"Deyang Wanhang Die Forging Co., Ltd., China National Erzhong Group Co., Deyang 618000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin","family":"Jiang","sequence":"additional","affiliation":[{"name":"China State Shipbuilding Co., Ltd., Huangpu Wenchong Shipbuilding Company Ltd., Guangzhou 510715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mingliang","family":"Cui","sequence":"additional","affiliation":[{"name":"Deyang Wanhang Die Forging Co., Ltd., China National Erzhong Group Co., Deyang 618000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Materials Science and Engineering, Beijing University of Technology, Beijing 100080, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0036-646X","authenticated-orcid":false,"given":"Sheng","family":"Cao","sequence":"additional","affiliation":[{"name":"Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou 510632, China"},{"name":"College of Chemistry and Materials Science, Jinan University, Guangzhou 511443, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,4,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1179\/1743280411Y.0000000014","article-title":"Laser Additive Manufacturing of Metallic Components: Materials, Processes and Mechanisms","volume":"57","author":"Gu","year":"2012","journal-title":"Int. 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