The influence of aluminum alloying on microstructure, phase composition, and mechanical properties of chromium-nickel steel obtained by electron-beam additive manufacturing

IF 0.4 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Russian Physics Journal Pub Date : 2025-03-14 DOI:10.1007/s11182-025-03419-x

S. V. Astafurov, E. G. Astafurova, E. A. Zagibalova, A. V. Luchin, E. A. Kolubaev

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Abstract

The influence of aluminum alloying on microstructure, phase composition, and mechanical properties of the AISI 321 austenitic stainless steel produced by a dual-wire electron-beam additive manufacturing is investigated. The billets with 5 and 10 wt.% of Al were produced using an electron-beam additive manufacturing process with simultaneous deposition of AISI 321 and aluminum wires. It has been shown that the AISI 321 steel alloyed with 5 wt.% of aluminum has duplex microstructure (ferrite + austenite) and demonstrates higher strength characteristics in comparison with aluminum-free steel. Specimens with tensile axis lying in the plane perpendicular to the grown direction of the additively produced billet is characterized by satisfactory plasticity (25–35%), and the specimens whose axis coincides with the grown direction of the billet undergo brittle fracture due to the possible presence of finely dispersed particles of intermetallic compounds at interphase or interlayer boundaries. Steel alloyed with 10 wt.% of aluminum has a single-phase ferritic structure, and steel specimens undergo brittle fracture regardless of their orientation relative to the grown direction of the additively produced billet. The results obtained show that for dual-wire electron-beam additive manufacturing technology is perspective for obtaining a light-weight Cr–Ni steel with high strength properties.

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研究了铝合金对电子束增材制造铬镍钢的显微组织、相组成和力学性能的影响

研究了合金化对双线电子束增材制造的AISI 321奥氏体不锈钢组织、相组成和力学性能的影响。坯料与5和10 wt。采用电子束增材制造工艺，同时沉积AISI 321和铝线，制备了%的铝。结果表明，AISI 321钢与5 wt合金化。%的铝具有双相组织（铁素体+奥氏体），与不含铝的钢相比具有更高的强度特性。拉伸轴位于与增材方坯生长方向垂直的平面上的试样具有良好的塑性（25-35%），而轴与增材方坯生长方向重合的试样由于在相间或层间边界可能存在分散的金属间化合物颗粒而发生脆性断裂。10 wt合金化钢。%的铝具有单相铁素体组织，而钢试样无论其相对于增材生产的坯料的生长方向如何，都会发生脆性断裂。结果表明，双线电子束增材制造技术是制备高强度轻量化Cr-Ni钢的有效途径。

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来源期刊

Russian Physics Journal PHYSICS, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

50.00%

发文量

208

审稿时长

3-6 weeks

期刊介绍： Russian Physics Journal covers the broad spectrum of specialized research in applied physics, with emphasis on work with practical applications in solid-state physics, optics, and magnetism. Particularly interesting results are reported in connection with: electroluminescence and crystal phospors; semiconductors; phase transformations in solids; superconductivity; properties of thin films; and magnetomechanical phenomena.