Abstract The dry sliding friction and wear behavior of nano/ultrafine-grained (NG/UFG), heterogeneous ultrafine-grained (HUFG), and coarse-grained (CG) austenitic stainless steels was studied. The results revealed that the wear resistance of the samples increased with an increase in hardness under the applied load of 10 N. However, under the applied loads of 20 N and 30 N, the HUFG steel presented the best wear resistance. Analysis of the wear mechanism revealed that the HUFG structure with good comprehensive performances formed a continuous hardened layer early, which did not delaminate and peel off prematurely, thereby effectively resisting the damage of a Si3N4 ball. The e- and α′-martensite were generated below the wear surfaces of the NG/UFG, HUFG, and CG samples after wear.

中文翻译：

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纳米/超细晶和异质超细晶18Cr-8Ni奥氏体不锈钢的摩擦磨损行为

摘要 研究了纳米/超细晶（NG/UFG）、异质超细晶（HUFG）和粗晶（CG）奥氏体不锈钢的干滑动摩擦磨损行为。结果表明，在10 N的外加载荷下，试样的耐磨性随着硬度的增加而增加。然而，在20 N和30 N的外加载荷下，HUFG钢的耐磨性最好。磨损机理分析表明，综合性能良好的HUFG结构早期形成连续硬化层，不会过早分层和剥离，有效抵抗Si3N4球的损伤。磨损后，在 NG/UFG、HUFG 和 CG 样品的磨损表面下方生成 e-和 α'-马氏体。