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Striped Non-Uniform Corrosion Behavior of Non-Equiatomic FeMnCoCr High-Entropy Alloy Prepared by Laser Melting Deposition in 0.1 M H

机译:通过激光熔化沉积在0.1米H中制备的非赤型毫微植物高熵合金的条纹非均匀腐蚀行为

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摘要

The corrosion behavior of the Fe50Mn30Co10Cr10 high-entropy alloy (HEA) manufactured via laser melting deposition (LMD) was investigated using open circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy measurements. The microstructure and morphology of LMD samples before and after the electrochemical tests were compared using X-ray diffraction, optical microscopy, scanning electron microscopy, and electron backscatter diffraction techniques. After the corrosion tests, a striped morphology was observed on the surface of the LMD HEA, which is mainly caused by the interval distribution of high-density and low-density grain-boundary regions. The corrosion performances varied with different planes of the LMD HEA sample, which is mainly controlled by the grain size at each plane. Local corrosion in this HEA is concentrated at the melt pool boundary, which may be due to the abundant metallurgical defects and stress concentration at this location.
机译:使用开放电路电位,电位偏振和电化学阻抗光谱测量来研究通过激光熔化沉积(LMD)制造的Fe50mN30CO10CR10高熵合金(HEA)的腐蚀行为。使用X射线衍射,光学显微镜,扫描电子显微镜和电子反向散射衍射技术比较电化学试验前后LMD样品的微观结构和形态。在腐蚀试验之后,在LMD Hea的表面上观察到条纹形态,其主要由高密度和低密度晶界区域的间隔分布引起。 LMD HEA样品的不同平面变化,LMD HEA样品的不同平面是主要由每个平面上的晶粒尺寸控制。该HEA中的局部腐蚀集中在熔融池边界处,这可能是由于该位置的丰富冶金缺陷和应力集中。

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