Simulation of Porosity Regrowth during Heat Treatment after Hot Isostatic Pressing in Titanium Components

IF 0.3 Q4 THERMODYNAMICS
C. Behrens, M. Siewert, A. Lüke, D. Bödeker, V. Ploshikhin
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引用次数: 0

Abstract

Abstract Additive manufacturing (AM) is driven by design freedom, having fewer process constraints than traditional manufacturing processes. It requires careful process control and qualified parameters to create dense metal parts. However, defects in the form of cavities can be detected in as-built specimens by computed tomography. Post-processing techniques such as hot isostatic pressing (HIP) are applied to eliminate porosity, but regrowth of argon gas pores is observed after additional heat treatment. In this work, a mesoscopic heat treatment simulation of an argon-filled gas pore in titanium components is presented. A combination of HIP and high-temperature heat treatment for β -annealing is simulated. Calculated pore regrowth is qualitatively consistent with experimental observation from the literature. Simulation results support the hypothesis of argon not dissolving in the titanium matrix by assuming a constant amount of argon particles in the pore. Mesoscopic heat treatment simulations may be a part of a simulation-driven optimization of thermal post-processing to improve the quality and performance of AM components.
钛件热等静压热处理过程中气孔再生的模拟
增材制造(AM)是由设计自由驱动的,比传统制造工艺具有更少的工艺约束。它需要仔细的过程控制和合格的参数来制造致密的金属零件。然而,通过计算机断层扫描,可以在已建成的样品中检测到空洞形式的缺陷。采用热等静压(HIP)等后处理技术来消除气孔,但在额外热处理后观察到氩气气孔的再生长。在这项工作中,提出了一种介观的热处理模拟在一个充满氩气孔的钛部件。模拟了β -退火中HIP和高温热处理相结合的过程。计算的孔隙再生与文献中的实验观察在质量上是一致的。通过假设孔隙中有一定量的氩粒子,模拟结果支持了氩不溶解于钛基体的假设。介观热处理模拟可以作为模拟驱动的热后处理优化的一部分,以提高增材制造部件的质量和性能。
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
CiteScore
1.50
自引率
33.30%
发文量
43
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