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Effect of solution heat treatment and hot isostatic pressing on the microstructure and mechanical properties of Hastelloy X manufactured by electron beam powder bed fusion

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Journal of Materials Science & Technology 2022年第3期98卷 99-117页

作者： Amal Shaji Karapuzha darren fraser Yuman Zhu Xinhua Wu Aijun Huang Department of Materials Science and Engineering Monash UniversityVictoria 3800Australia Monash Centre for Additive Manufacturing 15-17 Normanby RdNotting HillVIC 3168Australia Manufacturing Unit CSIROClaytonVictoria 3168Australia

Prior to the application of AM components for critical applications,it is necessary to have a better understanding of the effect of different post-fabrication treatments on the microstructure and mechanical properties of such *** this study,efforts were made to achieve an in-depth understanding of the effect of post-fabrication Solution Heat Treatment(SHT)and Hot Isostatic Pressing(HIP)on the microstructure and mechanical properties of Hastelloy X parts built by electron beam powder bed fusion(PBF-EB)*** effects of SHT and HIP on porosity,microstructure,texture and mechanical properties have been investigated and compared with that of as-built PBF-EB Hastelloy ***-fabrication HIP treatment led to a significant reduction in the porosity content,whereas no notable difference in porosity was observed between SHT and as-built *** was no evidence of any recrystallization occurring following the post-fabrication treatments as elongated columnar grain structures observed within as-built part were found to be maintained even after SHT and HIP process alongside the strongcrystallographic *** was laid upon understanding the influence of SHT and HIP on mechanical properties through stress-strain curves and work-hardening behaviour.

关键词： Additive manufacturing Electron beam powder bed fusion Nickel-based superalloy Heat treatment Hot isostatic pressing

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