The effect of a new severe plastic deformation method, “repetitive corrugation and straightening by rolling (RCSR)” on AISI 304 stainless steel is investigated. A thermo‐mechanical treatment based on the reversion of α′‐martensite is applied to produce fine‐grained structure. Microstructural characterizations are conducted by X‐ray diffraction and electron backscattered diffraction. Mechanical properties are investigated by measuring uniaxial tensile properties. It was found that the amount of strain‐induced martensite increases monotonically with increasing of applied strain, yielding up to 90 vol% of martensite after 30 cycles of the RCSR process. By applying a subsequent annealing, austenite grain size is decreased considerably, which leads to substantial strengthening.
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Asghari‐Rad et al. (2016) studied this question.
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