Sanchez-Mata Oscar, Wang Xianglong, Muñiz-Lerma Jose Alberto, Attarian Shandiz Mohammad, Gauvin Raynald, Brochu Mathieu
Department of Mining and Materials Engineering, McGill University, 3610 University Street, Wong Building, Montreal, QC H3A 0C5, Canada.
Materials (Basel). 2018 Jul 25;11(8):1288. doi: 10.3390/ma11081288.
Crack-free Hastelloy X fabricated through laser powder bed fusion (LPBF) from powder with a standard chemical composition is reported. Electron backscatter diffraction (EBSD) analysis evidenced columnar grains parallel to the building direction. The typical LPBF columnar dendrite microstructure was found to be finer than reported elsewhere. Mo-enriched carbides (~50 nm), presumed to play an important role in the cracking behavior of the alloy, were confirmed along interdendritic regions. Crack-free condition was maintained after heat treatment at 1177 °C for 1 h followed by water quenching, and the resulting microstructure was analyzed.
据报道，通过激光粉末床熔融（LPBF）技术，使用具有标准化学成分的粉末制造出了无裂纹的哈氏合金X。电子背散射衍射（EBSD）分析表明，柱状晶粒与构建方向平行。发现典型的LPBF柱状枝晶微观结构比其他地方报道的更细。沿枝晶间区域确认了富含钼的碳化物（约50纳米），推测其在合金的开裂行为中起重要作用。在1177°C下热处理1小时后水淬，仍保持无裂纹状态，并对所得微观结构进行了分析。
