Microstructure and mechanical behavior of an AISI 304 austenitic stainless steel prepared by cold- or cryogenic-rolling and annealing

Zheng, Chengsi; Liu, Chunjiao; Ren, Minghao; Jiang, Heng; Li, Longfei

doi:10.1016/j.msea.2018.03.105

Cited by 45 publications

(29 citation statements)

References 41 publications

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“…With the exception of the as-received sample (0.8% α') and the one with 20% reduction (66% α'), the others showed α'-martensite volume fraction quite close (between 98 and 100%). High martensite volume fraction in cryogenic rolling was also obtained by Zheng et al 18 and Singh et al 19 with 304 steel. The M s temperature of the material under study (150 K) was estimated from its chemical composition.…”

Section: Resultssupporting

confidence: 53%

Residual Stress Analysis After the Induced Martensitic Transformation by Rolling and Tensile Test in the 304L TRIP Steel

2021

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In this work, the residual stress study by XRD was carried out after martensitic transformation of a 304L steel subjected to plastic strain by rolling and tensile test, at room and cryogenic temperatures. This article intents to contribute with the understanding of residual stresses generated by martensitic transformation induced by plastic deformation due to its complexity. From the experimental conditions employed, it was possible to obtain high martensite volumetric fraction and it was possible to observe the influence of existing phases on the performance of residual stress measurements. In general, compressive residual stress was observed for both austenite and martensite phases. The samples rolled at cryogenic temperature showed higher magnitudes of compressive stresses, between -123 and -231 MPa, for martensite volumes between 98 and 100%. It was also clearly displacement and widening of diffraction line due to the presence of residual macro and microstresses when compared to the as-received material.

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Section: Resultssupporting

confidence: 53%

Residual Stress Analysis After the Induced Martensitic Transformation by Rolling and Tensile Test in the 304L TRIP Steel

2021

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“…Moreover, an additional correction is subsequently applied to transform the device measurements into α'-martensite content. For that task, different calibration curves are available in the literature (Fava et al, 2018;Zheng et al, 2018;Talonen et al, 2004;Hünicke, 2000;Peterson, 1996;Hecker et al, 1982;Rintamaa, 1981). In this work, we use the bi-linear calibration curve proposed by Ortwein (2015), equation ( 2), where M stands for the martensite content and Fp for the ferrite percent provided by the device, both in volume-%.…”

Section: Magnetic Inductionmentioning

confidence: 99%

Flow and fracture of austenitic stainless steels at cryogenic temperatures

Fernández-Pisón

Rodríguez-Martínez

García‐Tabarés

et al. 2021

Engineering Fracture Mechanics

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In this paper, we have characterized the microstructural evolution and the plastic flow and fracture behaviours of AISI 304L and AISI 316LN stainless steel grades at liquid nitrogen temperature (77 K) and at liquid helium temperature (4 K). Uninterrupted tensile experiments, where the sample is continuously deformed under quasi-static loading conditions until fracture, have been carried out with a Single-Section Sample to obtain the stress-strain characteristics of the two grades. Interrupted tensile experiments, in which the sample is unloaded before fracture, have been performed with a novel Double-Section Sample to later characterize the strain-induced martensitic transformation at different levels of deformation. The content of martensite has been determined post-mortem, using magnetic induction, electron backscatter diffraction and quantitative light optical micrography. The results obtained with the three methods show quantitative agreement, and reveal that the martensitic transformation in AISI 304L occurs faster and to a greater extent than in AISI 316LN both at 77 K and at 4 K. To the authors' knowledge, in this paper we provide the first experimental results for the evolution of the content of strain-induced martensite in AISI 304L and AISI 316LN samples tested at liquid helium temperature. In addition, the experimental data for the evolution of the martensite volume fraction with the strain have been used to identify the temperature-dependent parameters of the martensitic transformation kinetic models proposed by Olson and Cohen (1975) and Garion and Skoczeń (2002). Moreover, Mode I fracture tests with fatigue-precracked Compact Samples have been carried out to determine the fracture properties of the two investigated materials using the "resistance curve procedure" (ASTM-E1820-20a, 2020). The crack-growth resistance curves have been obtained with four different methods here referred to as ASTM Compliance Method, W-N Compliance Method, Modified W-N Compliance Method and ASTM Normalization Method, which is an original methodological contribution of this paper. While the four approaches yield similar results for the fracture toughness, only the W-N Compliance Method and the Modified W-N Compliance Method, the latter being proposed in this paper, fulfil all the requirements of the standard ASTM-E1820-20a (2020) so that the calculated fracture toughness can be accepted as a material property. The comparison of results for both materials and testing temperatures shows that the AISI 316LN displays higher fracture toughness than the AISI 304L. Moreover, post-mortem microstructural analysis of the Compact Samples near the fracture surface has revealed that the content of martensite is greater in AISI 304L than in AISI 316LN. Furthermore, for AISI 304L more martensite is formed in the sample tested at 77 K because the plastic deformation near the crack is greater than at 4 K.

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“…In addition to alloying adjustments, another method to enhance the DIM transformation is rolling at lowered temperatures, the technique which has been applied to 304/304L and 316L grades in particular [10,41,66,[116][117][118][119][120].…”

Section: Cold Rolling Stagementioning

confidence: 99%

Processing and Properties of Reversion-Treated Austenitic Stainless Steels

Järvenpää

Jaskari

Kisko

et al. 2020

Metals

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Strength properties of annealed austenitic stainless steels are relatively low and therefore improvements are desired for constructional applications. The reversion of deformation induced martensite to fine-grained austenite has been found to be an efficient method to increase significantly the yield strength of metastable austenitic stainless steels without impairing much their ductility. Research has been conducted during thirty years in many research groups so that the features of the reversion process and enhanced properties are reported in numerous papers. This review covers the main variables and phenomena during the reversion processing and lists the static and dynamic mechanical properties obtained in laboratory experiments, highlighting them to exceed those of temper rolled sheets. Moreover, formability, weldability and corrosion resistant aspects are discussed and finally the advantage of refined grain structure for medical applications is stated. The reversion process has been utilized industrially in a very limited extent, but apparently, it could provide a feasible processing route for strengthened austenitic stainless steels.

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Microstructure and mechanical behavior of an AISI 304 austenitic stainless steel prepared by cold- or cryogenic-rolling and annealing

Cited by 45 publications

References 41 publications

Residual Stress Analysis After the Induced Martensitic Transformation by Rolling and Tensile Test in the 304L TRIP Steel

Residual Stress Analysis After the Induced Martensitic Transformation by Rolling and Tensile Test in the 304L TRIP Steel

Flow and fracture of austenitic stainless steels at cryogenic temperatures

Processing and Properties of Reversion-Treated Austenitic Stainless Steels

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