Annealing-induced Grain Refinement in a Nanostructured Ferritic Steel

材料科学技术（英文）, 2012, 28(1): 41-45.

Annealing-induced Grain Refinement in a Nanostructured Ferritic Steel

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1.Sheng Guo and Ke Lu Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China

2.Sheng Guo and Ke Lu Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China

3.Sheng Guo and Ke Lu Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China

4.Sheng Guo and Ke Lu Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China

关键词：英文摘要 , 材料科学 , 优秀论文 , 科技学报

Annealing-induced Grain Refinement in a Nanostructured Ferritic Steel

Keywords： Nanostructured , Surface mechanical attrition treatment (SMAT) , Ferritic steel , Grain refinement

A nanostructured surface layer with a mean ferrite grain size of -8 nm was produced on a Fe-gCr steel by means of surface mechanical attrition treatment. Upon annealing, ferrite grains coarsen with increasing temperature and their sizes increase to -40 nm at 973 K. Further increasing annealing temperature leads to an obvious reduction of ferrite grain sizes, to -14 nm at 1173 K. The annealing-induced grain refinement is analyzed in terms of phase transformations in the nanostructured steel.

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