Abstract

The present work discusses changes in hardness, wear, and corrosion behavior of electron beam (EB) surface treated (or simply, EB treated) 316L austenitic stainless steel (ASS) vis-à-vis the as-received material. Due to rapid solidification within the EB treated region, a fine dendritic structure develops within the surface and sub-surface of the EB treated material, which accounts for its superior hardness, wear, and corrosion behavior. The surface microhardness of the EB treated material is 22% enhanced than that of the as-received material. The cumulative wear depth of the EB treated material is 77% lower than the as-received material. An improvement in corrosion potential and an order of magnitude reduction in equilibrium corrosion current density are observed following EB treatment. The results of the present study suggest that EB treatment can be effectively used to enhance the surface properties of the selected ASS by microstructural refinement of the surface and sub-surface of the material.

Graphic Abstract

中文翻译：

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316L奥氏体不锈钢的电子束表面处理：硬度，耐磨性和耐腐蚀性的提高

摘要

本工作讨论了相对于原样材料，经表面处理（或简单地，经EB处理）的316L奥氏体不锈钢（ASS）的电子束（EB）的硬度，磨损和腐蚀行为的变化。由于在EB处理过的区域内快速凝固，因此在EB处理过的材料的表面和亚表面形成了精细的树枝状结构，这是其优越的硬度，耐磨性和耐腐蚀性能的原因。EB处理过的材料的表面显微硬度比原样提高了22％。经EB处理的材料的累积磨损深度比原先的材料低77％。在EB处理后，观察到腐蚀电位的提高和平衡腐蚀电流密度的数量级降低。

图形摘要