The present research examines the impact of temperature during Hot Isostatic Pressing (HIP) on the mechanical, microstructure, and density characteristics of Cu-based shape memory alloys (SMAs) made by Selective Laser Melting (SLM). HIP improved the density of the built components by 11.5 %, with a reduction in density with an increase in HIP temperature. Pore aspect ratio analysis revealed non-spherical pores at higher temperatures, while spherical and small pores were observed at 950 °C. SEM analysis demonstrated the disappearance of shrinkage porosity and an increase in grain size with higher HIP temperatures. XRD analysis confirmed phase transformation and variation in crystallite size with an increase in HIP temperature. After HIP treatment, microhardness and tensile strength significantly improved, with the 950 °C sample showing the highest values.

中文翻译：

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揭示热等静压温度对选区激光熔化CuAlNiMn形状记忆合金显微组织和力学特性的影响

本研究探讨了热等静压 (HIP) 过程中的温度对选择性激光熔化 (SLM) 制造的铜基形状记忆合金 (SMA) 的机械、微观结构和密度特性的影响。 HIP 将构建组件的密度提高了 11.5%，但密度随着 HIP 温度的升高而降低。孔隙纵横比分析显示，在较高温度下观察到非球形孔隙，而在 950 °C 时观察到球形和小孔隙。 SEM 分析表明，随着 HIP 温度的升高，收缩孔隙率消失，晶粒尺寸增大。 XRD 分析证实了随着 HIP 温度的升高，相变和微晶尺寸发生变化。经过 HIP 处理后，显微硬度和拉伸强度显着提高，其中 950 °C 样品显示出最高值。