Macroscopic and Microscopic Residual Stresses in Nickel-Aluminum Bronze Matrix Composite Surface Deposits Manufactured via Laser Melt Injection

IF 2.9 2区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
X. X. Zhang, E. Walz, A. Langebeck, J. Rebelo Kornmeier, A. Kriele, V. Luzin, M. Adveev, A. Bohlen, M. Hofmann
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Abstract

Wear is a prevalent issue across various industries. Spherical fused tungsten carbide (sFTC) reinforced nickel-aluminum bronze (NAB) matrix composite surface deposits have shown remarkable potential in mitigating wear by approximately 80%. However, the performance of these sFTC/NAB composite surface deposits is determined by their residual stress state, and the precise macroscopic and microscopic residual stresses within these composites have yet to be clearly established. To address this gap, we employed neutron diffraction to measure the residual stresses in the sFTC/NAB composite surface deposits and re-melted NAB samples produced via laser melt injection. Significant residual stresses were determined. The maximum tensile macro residual stress appears approximately 1–1.5 mm below the composite layer. Residual stresses accumulate with an increasing number of laser process tracks. The maximum tensile macro residual stress in the three-track samples reaches about 350 MPa. Preheating the base plate significantly reduces the levels of macroscopic residual stress. The WC phase displayed significant compressive thermal misfit residual stress magnitude, while the Cu matrix exhibited tensile thermal misfit residual stress. Preheating the base plate does not reduce microscopic thermal misfit residual stress levels. In addition, a finite element model was built to investigate temperature and residual stresses in the re-melted NAB samples. The predicted temperature history and residual stress agree with the experimental results.

激光熔融注射制备镍铝青铜基复合材料表面镀层的宏观和微观残余应力
磨损是各行各业普遍存在的问题。球形熔融碳化钨(sFTC)增强型镍铝青铜(NAB)基复合表面沉积物已显示出显著的潜力,可将磨损降低约 80%。然而,这些 sFTC/NAB 复合材料表面沉积物的性能取决于其残余应力状态,而这些复合材料内部精确的宏观和微观残余应力尚未明确确定。为了填补这一空白,我们采用中子衍射法测量了 sFTC/NAB 复合材料表面沉积物和通过激光熔体注入生产的再熔 NAB 样品中的残余应力。我们确定了显著的残余应力。最大拉伸宏观残余应力出现在复合材料层下约 1-1.5 毫米处。残余应力随着激光加工轨迹的增加而累积。三轨样品中的最大拉伸宏观残余应力达到约 350 兆帕。预热底板可显著降低宏观残余应力水平。WC 相显示出明显的压缩热错位残余应力,而铜基体则显示出拉伸热错位残余应力。预热底板不会降低微观热错位残余应力水平。此外,还建立了一个有限元模型来研究重新熔化的 NAB 样品中的温度和残余应力。预测的温度历史和残余应力与实验结果一致。
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来源期刊
Acta Metallurgica Sinica-English Letters
Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
6.60
自引率
14.30%
发文量
122
审稿时长
2 months
期刊介绍: This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.
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