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Investigation of defects and nanoparticles with martensitic phase transformation in surface nanostructured 316L stainless steel by slow-positron beam

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Abstract

In this article, we investigated the defects introduced by surface mechanical attrition treatment by Doppler-broadening spectroscopy of positron annihilation radiation in surface-nanostructured 316L stainless steel. Through the measurement of different thinning layers in the samples treated for 15 min, the slope of line shape parameter S versus wing parameter W curves showed three different values with depth responding to the change of defect configuration. An unusual change of S and W parameters near the surface was mainly from the effect of quantum-dot-like state caused by the formation of nanoparticles. Based on the change of S ˜ W with depth, the martensite phase transformation induced by strain could be estimated to occur within a depth of 35 µm.

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Authors and Affiliations

  1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China

    Xiaowei Wang, Liangyue Xiong, Xiaoguang Liu & Gang Liu

  2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China

    Chunlan Zhou & Long Wei

Authors
  1. Xiaowei Wang
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  2. Liangyue Xiong
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  3. Xiaoguang Liu
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  4. Gang Liu
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  5. Chunlan Zhou
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  6. Long Wei
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Correspondence to Xiaowei Wang.

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Wang, X., Xiong, L., Liu, X. et al. Investigation of defects and nanoparticles with martensitic phase transformation in surface nanostructured 316L stainless steel by slow-positron beam. Journal of Materials Research 25, 587–591 (2010). https://doi.org/10.1557/JMR.2010.0074

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  • DOI: https://doi.org/10.1557/JMR.2010.0074

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