Effects of Strain-Induced Cyclic Transformation on the Microstructure of the Peened Surface of SUS 304 Austenitic Stainless Steel,Physica Status Solidi (B) - Basic Solid State Physics

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Effects of Strain-Induced Cyclic Transformation on the Microstructure of the Peened Surface of SUS 304 Austenitic Stainless Steel
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2022-08-04 , DOI: 10.1002/pssb.202100603
Yuji Nakagawara ₁ , Hisashi Sato ₁ , Tomokazu Moritani ₁ , Yoshimi Watanabe ₁

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The effects of strain-induced cyclic transformation on surface microstructure are investigated for SUS 304 austenitic stainless steel. The strain-induced cyclic transformation comprises the repetition of the strain-induced martensitic transformation and the strain-induced reverse transformation. Herein, the strain-induced cyclic transformation is performed by the repetition of shot-peening (SP) tests at room temperature and at 200 °C. SP at room temperature effects a martensitic transformation, whereas the reverse transformation, from martensite to austenite, is induced by SP at 200 °C. Compared with that of a specimen treated by conventional SP, the surface hardness of a specimen treated by strain-induced cyclic transformation using SP is higher, because the dislocation density on the peened surface increases and the microstructure is refined. Therefore, the strain-induced cyclic transformation affected by SP can enhance the surface mechanical properties of steels.

中文翻译：

应变诱导循环转变对SUS 304奥氏体不锈钢喷丸表面组织的影响

研究了SUS 304奥氏体不锈钢的应变诱导循环转变对表面组织的影响。应变诱导循环转变包括应变诱导马氏体转变和应变诱导逆转变的重复。在此，应变诱导的循环转变是通过在室温和 200°C 下重复喷丸 (SP) 测试来进行的。室温下的 SP 影响马氏体转变，而从马氏体到奥氏体的逆转变是由 SP 在 200 °C 下引起的。与常规SP处理的试样相比，SP处理的应变诱导循环转变试样的表面硬度更高，因为喷丸表面的位错密度增加，显微组织细化。

更新日期：2022-08-04

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