Microstructure and nanoindentation hardness of shot-peened ultrafine-grained low-alloy steel
查看参考文献34篇
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文摘
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The effect of shot peening (SP) on microstructure and hardness of ultrafine-grained (UFG) low-alloy steel was investigated. With increasing shot-peening time from 0.5 to 1.5 h, grain size of UFG low-alloy steel decreases from 400 to 280 nm at surface whilst that of the layer with a depth of 160 lm decreases from (230 ± 15) to (75 ± 5) nm. Interestingly, nanoindentation shows that hardness increases linearly with increasing the SP duration, reaching a value as high as (7.10 ± 0.1) GPa at the depth of 160 lm after the SP duration of 1.5 h. The thickness of the SP treated layer is measured as ~300 lm. The Hall–Petch (H–P) relationship was established for the hardening layer. Correspondingly, abrasion resistance should be ~ 51 %higher than that of as-prepared UFG low-alloy steel. As shown in SP processing, grain refinement is the key factor responsible for the strengthening of the studied steel. |
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来源
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Journal of Iron and Steel Research
, International,2019,26(5):472-482 【核心库】
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DOI
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10.1007/s42243-018-0061-z
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关键词
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Low-alloy steel
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Shot peening
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Grain refinement
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Nanoindentation
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Hardness
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地址
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1.
Institute of Systems Engineering of China Academy of Engineering Physics, Sichuan, Mianyang, 621999
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School of Materials Science and Engineering, Northeastern University, Key Laboratory for Anisotropy and Texture of Materials (MOE), Liaoning, Shenyang, 110819
3.
Northeastern University, The State Key Lab of Rolling and Automation, Liaoning, Shenyang, 110819
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1006-706X |
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学科
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冶金工业 |
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基金
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国家自然科学基金委员会-中国工程物理研究院“NSAF联合基金”
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国家自然科学基金
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the Science and Technology Research Project of Education Department of Liaoning Province
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文献收藏号
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CSCD:6522115
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