Nanostructurization assisted by twinning during equal channel angular pressing of metastable 316L stainless steel

Ueno, Hiroshi; Kakihata, K.; Kaneko, Yoshihisa; Hashimoto, Satoshi; Vinogradov, Alexei

doi:10.1007/s10853-011-5303-4

Cited by 55 publications

(27 citation statements)

References 24 publications

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“…Figure 1 shows a typical microstructure of the processed sample. Similarly to the results reported for the same type steel, 3,10) the very fine deformation twins were generated in approximately a half volume of the billet.…”

Section: Fatigue Testsupporting

confidence: 78%

“…The ECAP processing was carried out with an ECAP die Table 1 Chemical composition of the SUS316L stainless steel used (mass%). 3,4,9) In the present study, the billets were pressed through the die only 1 time.…”

Section: Process and Materialsmentioning

confidence: 98%

“…The nano-twinned microstructures and related superior mechanical properties were found in copper processed by electrodeposition, dynamic plastic deformation 1) and low-temperature ECAP followed by cryodrawing and cryorolling, 2) and in the SUS316L austenitic stainless steel with low stacking fault energy. 3,4) Another example of the twinning-based deformation strategy was given by Zhao et al 5) for the low SFE steels with the TWIP (Twinning Induced Plasticity) effect.…”

Section: Introductionmentioning

confidence: 99%

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Cyclic Response of SUS316L Stainless Steel Processed by ECAP

2013

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The cyclic response of the SUS316L stainless steel with the nanostructure induced by profuse twinning during equal channel angular pressing (ECAP) at 423 K was investigated with the focus on the shape of the hysteresis loops and their evolution with cycling. The SUS316L steel with the nanostructured twins showed a very high stress amplitude if compared to their conventional counterparts. However, unlike the as-quenched specimens, the ECAPed SUS316L steel revealed considerable cyclic softening at plastic strain amplitudes above 2 © 10 ¹4 . Besides, the ECAPed specimens showed characteristic stress asymmetry behavior during fatigue. At the initial stages of the fatigue tests, a tensile peak stress of the hysteresis loop was higher than a compressive one. Then, the tensile peak stresses gradually decreased with increasing cycles and finally became lower than the compressive peak stress under plastic strain amplitudes higher than 2 © 10 ¹4. Since no stress asymmetry was detected for the as-quenched sample, the observed stress asymmetry behavior was attributed to the specific asymmetric response of the directionally sheared microstructure created during ECAP.

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Section: Fatigue Testsupporting

confidence: 78%

Section: Process and Materialsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Cyclic Response of SUS316L Stainless Steel Processed by ECAP

2013

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“…The inferior ductility has severely limited the application of this material. The low ductility was caused by low strain hardening [11][12][13], which is the result of small grain sizes. In recent…”

Section: Introductionmentioning

confidence: 99%

“…The low ductility was caused by low strain hardening [11][12][13], which is the result of small grain sizes. In recent years, several research efforts were made to achieve a combination of high strength and reasonable ductility through the creation of heterogeneous microstructures, and it was clearly demonstrated that the bimodal grain size distribution is a simple and effective approach to obtaining heterogeneous microstructures with high strength and sufficient ductility [7,9,[14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Study on Microstructure and Properties of Bimodal Structured Ultrafine-Grained Ferrite Steel

Niu

Zhang

et al. 2017

Metals

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Abstract:The objective of the study research was to obtain bimodal structured ultrafine-grained ferrite steel with outstanding mechanical properties and excellent corrosion resistance. The bimodal microstructure was fabricated by the cold rolling and annealing process of a dual-phase steel. The influences of the annealing process on microstructure evolution and the mechanical properties of the cold-rolled dual-phase steel were investigated. The effect of bimodal microstructure on corrosion resistance was also studied. The results showed that the bimodal characteristic of ferrite steel was most apparent in cold-rolled samples annealed at 650 • C for 40 min. More importantly, due to the coordinated action of fine-grained strengthening, back-stress strengthening, and precipitation strengthening, the yield strength (517 MPa) of the bimodal microstructure improved significantly, while the total elongation remained at a high level of 26%. The results of corrosion experiments showed that the corrosion resistance of bimodal ferrite steel was better than that of dual-phase steel with the same composition. This was mainly because the Volta potential difference of bimodal ferrite steel was smaller than that of dual-phase steel, which was conducive to forming a protective rust layer.

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Frontiers for Bulk Nanostructured Metals in Biomedical Applications

Lowe

Valiev

2014

Advanced Biomaterials and Biodevices

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Nanostructurization assisted by twinning during equal channel angular pressing of metastable 316L stainless steel

Cited by 55 publications

References 24 publications

Cyclic Response of SUS316L Stainless Steel Processed by ECAP

Cyclic Response of SUS316L Stainless Steel Processed by ECAP

Study on Microstructure and Properties of Bimodal Structured Ultrafine-Grained Ferrite Steel

Frontiers for Bulk Nanostructured Metals in Biomedical Applications

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