| 应用纳米压痕技术研究表面纳米化后316L不锈钢力学性能 |
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| 引用本文： | 郎风超,邢永明,朱静.应用纳米压痕技术研究表面纳米化后316L不锈钢力学性能[J].工程力学,2008,25(10). |
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| 作者姓名： | 郎风超 邢永明 朱静 |
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| 作者单位： | 内蒙古工业大学理学院 |
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| 摘 要： | 316L不锈钢经表面纳米化(SNC)处理后,表面形成一层纳米层。样品表面晶粒细化至纳米级大约12nm左右,随着深度的增加,晶粒尺寸逐渐增大。该文应用纳米压痕技术分析了纳米层力学性能,结果表明:纳米层的纳米硬度和弹性模量分别为6.05GPa和227GPa,是基体硬度和弹性模量的1.4倍和1.2倍。随距表面距离的增加而降低,并逐步趋近于一个稳定值。同时测得纳米层的应变硬化指数为0.44为基体的1.5倍。
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| 关 键 词： | 金属材料 316L不锈钢 纳米压痕技术 表面纳米化 力学性能 |
THE MECHANICAL PROPERTIES OF 316L STAINLESS STEEL AFTER SURFACE NANOSTRUCTURE TREATMENT USING NANOINDENTATION |
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| LANG Feng-chao,XING Yong-ming,ZHU Jing.THE MECHANICAL PROPERTIES OF 316L STAINLESS STEEL AFTER SURFACE NANOSTRUCTURE TREATMENT USING NANOINDENTATION[J].Engineering Mechanics,2008,25(10). |
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| Authors: | LANG Feng-chao XING Yong-ming ZHU Jing |
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| Abstract: | By means of Surface Nano-Crystallization (SNC), a nanostructured surface layer was formed on 316L stainless steel plate, with the grain refined into nanoscale. The grain sizes are about 12nm at the top surface layer, and gradually increase with the depth. Mechanical properties of nanostructured surface layer are analyzed using nanoinedtation. The results show that the nanohardness and the elastic modulus of the nanostructure surface layers are about 6.05GPa and 227GPa respectively, and are 1.4 times and 1.2 times of those of the matrix. The nanohardness and the elastic modulus decrease with the depth, and then trend to stable values. The hardening index of nanostructure surface layers is about 0.44, 1.5 times of the value of the matrix. |
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| Keywords: | metallic materials 316L stainless steel nanoindentation surface nanocrystallization mechanical properties |
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