Thermal and Mechanical Stability of Austenite in Metastable Austenitic Stainless Steel

Tiamiyu, A.A.; Zhao, Shiteng; Li, Zezhou; Odeshi, A.G.; Szpunar, Jerzy A.

doi:10.1007/s11661-019-05362-2

Cited by 4 publications

(4 citation statements)

References 38 publications

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“…As the effect of ion implantation depends strongly both on the phase and chemical composition of irradiated materials [12,13,29], it is of interest to investigate the peculiarities of ion implantation of an initially double-phase surface of rolled steel. Moreover, as it was reported in [26], a decrease of the grain size results in more intense strain-induced martensite transformation. It can be proposed that ion irradiation may be more effective in the case of an initially deformed surface with a fine grain structure.…”

Section: Introductionsupporting

confidence: 63%

“…Martensite transformation in this steel can be induced both via thermal (using cooling to liquid nitrogen temperature) and mechanical mechanisms. It was reported [26] that martensite transformation in AISI 321 proceeds both at quasi-static and dynamic mechanical loading. Moreover, dry sliding results in austenite to martensite transformation in AISI 321 steel [27].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Aluminum Ion Irradiation on Chemical and Phase Composition of Surface Layers of Rolled AISI 321 Stainless Steel

Bykov

Bayankin

Tcherdyntsev

et al. 2021

Metals

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Commercial rolled AISI 321 stainless steel samples were irradiated with Al+ ions with an energy of 80 keV and fluence of 1017 ion/cm2. The effect of Al implantation on the chemical and phase composition of the steel surface layer was studied by X-ray electron spectroscopy and grazing beam mode of X-ray diffraction analysis. A thin surface layer down to a depth of 30 nm after Al+ ions implantation consists mainly of metal oxides. In the near-surface layers of 5 nm in depth, a noticeable depletion in chromium and nickel was observed. A surface layer (up to 0.5 µm) of non-irradiated steel, in addition to the f.c.c. austenite γ-phase, consists of up to 20 vol% of the b.c.c. α′-phase, which formed at rolling as a result of mechanical deformation. Al implantation results in the significant increase in the α′-phase amount in the surface layer at a depth up to 2 µm. It is indicated that the observed γ → α′ transformation at ion irradiation proceeds predominantly as a result of the effect of post-cascade shock waves, but not as a result of the surface layer chemical composition changes.

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Section: Introductionsupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Effect of Aluminum Ion Irradiation on Chemical and Phase Composition of Surface Layers of Rolled AISI 321 Stainless Steel

Bykov

Bayankin

Tcherdyntsev

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…The main form of instability is necklace DRX. (5) The DRX mechanism of the tested steel is the migration of subgrains. The δ phase reduces the activation energy and promotes the occurrence of DRX.…”

Section: Discussionmentioning

confidence: 99%

“…As a candidate structural material for the low-pressure system of the fourth-generation sodium-cooled fast neutron reactor, it is mainly used for components such as reactor vessels, primary loop sodium-sodium reaction heat exchangers, and primary and secondary loop main pipelines [3]. There are many reports concerning the hot stability and mechanical properties [4,5], resistance to intergranular corrosion [2], surface processing properties [6], and welding properties of 321 stainless steel [1].…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behaviors of as Cast 321 Austenitic Stainless Steel

Zhao

Ren

Wang

et al. 2021

Metals

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AISI 321 stainless steel has excellent resistance to intergranular corrosion and is generally used in nuclear power reactor vessels and other components. The as-cast and wrought structures are quite different in hot workability, so physical simulation, electron back-scatter diffraction, and hot processing maps were used to study the mechanical behavior and microstructure evolution of as-cast nuclear grade 321 stainless steel in the temperature range of 900–1200 °C and strain rate range of 0.01–10 s−1. The results showed that the flow curve presented work-hardening characteristics. The activation energy was calculated as 478 kJ/mol. The fraction of dynamic recrystallization (DRX) increased with increasing deformation temperature and decreasing strain rate. DRX grain size decreased with increasing Z value. Combining the hot working map and DRX state map, the suggested hot working window was 1000–1200 °C and 0.01–0.1 s−1. The main form of instability was necklace DRX. The nucleation mechanism of DRX was the migration of subgrains. The δ phase reduced the activation energy and promoted DRX nucleation of the tested steel.

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Grain size dependent mechanical behavior and TRIP effect in a metastable austenitic stainless steel

Sohrabi

Mirzadeh

Sadeghpour

et al. 2023

International Journal of Plasticity

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Thermal and Mechanical Stability of Austenite in Metastable Austenitic Stainless Steel

Cited by 4 publications

References 38 publications

Effect of Aluminum Ion Irradiation on Chemical and Phase Composition of Surface Layers of Rolled AISI 321 Stainless Steel

Effect of Aluminum Ion Irradiation on Chemical and Phase Composition of Surface Layers of Rolled AISI 321 Stainless Steel

Hot Deformation Behaviors of as Cast 321 Austenitic Stainless Steel

Grain size dependent mechanical behavior and TRIP effect in a metastable austenitic stainless steel

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