Effect of hot isostatic pressing on the microstructure of laser powder bed fused A20XTM alloy

J Barode, E Bassini, A Aversa, D Manfredi, D Ugues, S Biamino, M Lombardi, P Fino
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Abstract

In the present work, an attempt has been made to do a combined hot isostatic pressing (HIP) & solution treatment in a single-step and the effect of different cooling rates (quenching and annealing) on the microstructure was examined. For a comparison, solution treatment (without HIP) was also analysed. It was observed that HIP treatment was successful in reducing the macro-porosities of the L-PBF part. Although, it was not an efficient treatment for the dissolution of the θ-Al2Cu phase. Furthermore, in both HIP-Quenched and HIP-Annealed treatments a sign of incipient melting was observed along the grain boundaries. Solution treatment without HIP did not show incipient melting.
热等静压对激光粉末床熔化 A20XTM 合金微观结构的影响
本研究尝试将热等静压(HIP)和固溶处理结合在一起,并研究了不同冷却速度(淬火和退火)对微观结构的影响。为了进行比较,还分析了固溶处理(无 HIP)。据观察,HIP 处理成功地降低了 L-PBF 零件的宏观孔隙率。不过,这种处理方法并不能有效地溶解 θ-Al2Cu 相。此外,在 HIP 淬火和 HIP 退火处理中,沿晶界都观察到了萌芽熔化的迹象。未进行 HIP 的固溶处理则未出现萌芽熔化现象。
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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