本文主要研究内容
作者（2019）在《Development of gas tungsten arc welding using current pulsing technique to preclude chromium carbide precipitation in aerospace-grade alloy 80A》一文中研究指出：Weldments were produced using gas tungsten arc welding（GTAW） and pulsed current gas tungsten arc welding（PCGTAW） techniques with ERNiCr-3 filler wire. Macro examination revealed that the resultant weldments were free from defects. A refined microstructure was observed in the weldment fabricated through PCGTAW. Scanning electron microscopy（SEM） analysis revealed secondary phases in the grain boundaries. Energy-dispersive X-ray spectroscopy（EDS） analysis revealed that microsegregation of Cr carbide precipitates was completely eradicated through PCGTAW. The microsegregation of Nb precipitates was observed in the GTA and PCGTA weldments. X-ray diffraction（XRD） analysis revealed the existence of M23C?6 Cr-rich carbide and Ni8Nb phases in the GTA weldments. By contrast, in the PCGTA weldments, the Ni8Nb phase was observed. The Cr2Ti phase was observed in both the GTA and the PCGTA weldments. Tensile tests showed that the strength and ductility of the PCGTA weldments were slightly higher than those of the GTA weldments.
Abstract
Weldments were produced using gas tungsten arc welding（GTAW） and pulsed current gas tungsten arc welding（PCGTAW） techniques with ERNiCr-3 filler wire. Macro examination revealed that the resultant weldments were free from defects. A refined microstructure was observed in the weldment fabricated through PCGTAW. Scanning electron microscopy（SEM） analysis revealed secondary phases in the grain boundaries. Energy-dispersive X-ray spectroscopy（EDS） analysis revealed that microsegregation of Cr carbide precipitates was completely eradicated through PCGTAW. The microsegregation of Nb precipitates was observed in the GTA and PCGTA weldments. X-ray diffraction（XRD） analysis revealed the existence of M23C?6 Cr-rich carbide and Ni8Nb phases in the GTA weldments. By contrast, in the PCGTA weldments, the Ni8Nb phase was observed. The Cr2Ti phase was observed in both the GTA and the PCGTA weldments. Tensile tests showed that the strength and ductility of the PCGTA weldments were slightly higher than those of the GTA weldments.
论文参考文献
论文详细介绍
论文作者分别是来自International Journal of Minerals Metallurgy and Materials的，发表于刊物International Journal of Minerals Metallurgy and Materials2019年02期论文，是一篇关于,International Journal of Minerals Metallurgy and Materials2019年02期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自International Journal of Minerals Metallurgy and Materials2019年02期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：International Journal of Minerals Metallurgy and Materials2019年02期论文;