Formation of Controlled CuSn10 Transition Layer in Additively Manufactured 316L/NiTi Multi-Material

IF 0.6 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metal Science and Heat Treatment Pub Date : 2026-08-06 DOI:10.1007/s11041-026-01220-2

A. V. Repnin, E. V. Borisov, D. A. Rozhkova, A. P. Maksimov, A. A. Popovich

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Abstract

The possibility of creating a multi-material based on 316L stainless steel and NiTi shape memory alloy (SMA) via selective laser melting (SLM) is studied. The challenges of poor weldability due to formation of brittle intermetallic compounds (FeTi) and differences in the physicochemical properties of the components are overcome by a comprehensive approach that includes introduction of a CuSn10 transition layer and implementation of a bio-inspired weld structure. The experimental results demonstrate that the CuSn10 transition layer effectively suppresses the formation of the FeTi intermetallic. The region with an anomalous chemical composition and elevated microhardness (up to 227 HV )occurring at the CuSn10/NiTi interface is associated with formation of intermetallic phases. The multi-material exhibits a high tensile strength (333 MPa) and a low ductility (3% elongation) associated with printing defects. It is demonstrated that a two-way shape memory effect (SME) develops in the multi-material obtained. These finding scon firm the fundamental feasibility of preservation of the functional properties of NiTi in SLM-manufactured multi-materials, which is promising for robotics applications.

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增材制造316L/NiTi复合材料中可控CuSn10过渡层的形成

研究了采用选择性激光熔化法制备316L不锈钢和NiTi形状记忆合金复合材料的可能性。通过引入CuSn10过渡层和实施仿生焊接结构等综合方法，克服了由于脆性金属间化合物（FeTi）的形成和部件物理化学性质的差异而导致的焊接性差的挑战。实验结果表明，CuSn10过渡层有效地抑制了FeTi金属间化合物的形成。CuSn10/NiTi界面处化学成分异常、显微硬度升高（高达227 HV）的区域与金属间相的形成有关。该复合材料具有高抗拉强度（333mpa）和低延展性（3%伸长率），与印刷缺陷相关。结果表明，所获得的多材料具有双向形状记忆效应（SME）。这些发现证实了在slm制造的复合材料中保存NiTi功能特性的基本可行性，这对于机器人应用是有希望的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metal Science and Heat Treatment 工程技术-冶金工程

CiteScore

1.20

自引率

16.70%

发文量

102

审稿时长

4-8 weeks

期刊介绍： Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering. Topics covered include: New structural, high temperature, tool and precision steels; Cold-resistant, corrosion-resistant and radiation-resistant steels; Steels with rapid decline of induced properties; Alloys with shape memory effect; Bulk-amorphyzable metal alloys; Microcrystalline alloys; Nano materials and foam materials for medical use.