文献类型：期刊文献

英文题名：Achieving high-temperature strength in additively manufactured Al-Ni alloys through Sc microalloying: a multiphysics simulation and experimental study

作者：Li, Jian[1];Huang, Yaoxin[2];Wen, Jianfeng[3];Zou, Peng[4];Guo, Wei[1];Ye, Ting[1];Jiang, Zhewei[1];Zhu, Pengwan[1]

机构：[1]Longyan Univ, Sch Phys & Electromech Engn, Longyan, Peoples R China;[2]Fujian Univ Technol, Mech & Automot Engn, Fuzhou, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai, Peoples R China;[4]Aircraft Strength Res Inst China, Natl Key Lab Strength & Struct Integr, Xian, Shaanxi, Peoples R China

年份：2026

卷号：48

期号：7

外文期刊名：JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING

收录：;EI(收录号：20262220779193);WOS:【SCI-EXPANDED(收录号:WOS:001773287800048)】；

基金：This research was supported by Fujian Provincial Natural Science Foundation of China, grant number 2023J01986 and 2024J01854; Fujian Province Science and Technology Program Project, grant number 2025H0017; Fujian Province Key technological innovation projects, grant number 2024XQ003.

语种：英文

外文关键词：L-PBF; Multiphysics simulation technology; Sc; Al-Ni alloy; Melt pool morphology

摘要：To address the performance limitations arising from inherent defects in the laser powder bed fusion (L-PBF) process, this study proposes and demonstrates a simulation-driven alloy design framework. First, a high-fidelity multiphysics model encompassing melt pool dynamics, temperature-flow coupling, and solidification behaviour was employed to predict the printability of a newly designed aluminium-nickel (Al-Ni) alloy composition microalloyed with 0.7% scandium (Sc). Guided by simulations, the alloy was fabricated in a single experimental run using simulated process parameters. Experimental results validated the framework's efficacy: the scandium-modified aluminium-nickel alloy exhibited outstanding tensile strength (440 MPa) and yield strength (321 MPa) at room temperature, maintaining high levels at 200 degrees C (300 MPa and 245 MPa respectively). Microstructural analysis revealed that scandium addition formed coherent L1(2)-Al3Sc nanoparticles. These particles acted as effective heterogenous nucleation sites, promoting the transformation of columnar crystals into equiaxed grains while providing dispersion strengthening. Consequently, this study not only proposes a highly promising high-temperature aluminium alloy suitable for L-PBF processes but also validates a predictable, simulation-guided approach that accelerates the development of customised additive manufacturing materials.