A creep-resistant additively manufactured Al-Ce-Ni-Mn alloy. (1st April 2022)

• Record Type: Journal Article
• Authors: Michi, Richard A.; Sisco, Kevin; Bahl, Sumit; Yang, Ying; Poplawsky, Jonathan D.; Allard, Lawrence F.; Dehoff, Ryan R.; Plotkowski, Alex; Shyam, Amit
• Is Part Of: Acta materialia. Volume 227(2022)
• Publication Date: 2022-04-01
• Subjects: Additive manufacturing -- Aluminum alloys -- High-temperature materials -- Creep -- Al-Ce-Ni-Mn alloy; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2022.117699
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: Existing additively manufactured aluminum alloys exhibit poor creep resistance due to coarsening of their strengthening phases and refined grain structures. In this paper, we report on a novel additively manufactured Al-10.5Ce-3.1Ni-1.2Mn wt.% alloy which displays excellent creep resistance relative to cast high-temperature aluminum alloys at 300–400 °C. The creep resistance of this alloy is attributed to a high volume fraction (∼35%) of submicron intermetallic strengthening phases which are coarsening-resistant for hundreds of hours at 350 °C. The results herein demonstrate that additive manufacturing provides opportunities for development of creep-resistant aluminum alloys that may be used in bulk form in the 250–400 °C temperature range. Pathways for further development of such alloys are identified. Graphical abstract: Image, graphical abstract