The dependences of deformation temperature on the strain-hardening characteristics and fracture behavior of Mn–N bearing lean duplex stainless steel

Jia, Qixiang; Wang, Yongxin; Mei, Ruixue; Chen, Lei; Hao, Shuo; Zhang, Huanyu; Ma, Xiaocong; Zou, Zongyuan; Jin, Miao

doi:10.1016/j.msea.2021.141440

Cited by 17 publications

(4 citation statements)

References 46 publications

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“…The crack path of tested specimens resulted in a typical brittle quasi-cleavage fracture surface in the ferritic phase, following by induction of microcracks in the austenite grain crossing the ferritic-austenitic boundary. Finally, the crack propagates through the austenite grain [17,18,38,41,45,46]. Challa et al [39] observed a similar behavior in austenitic stainless steels with a nanograins microstructure, and ultrafine grains with an average grain size of 320 nm, associating the deformation mechanism mainly to the deformation twins.…”

Section: Fractography Analysismentioning

confidence: 86%

“…The map of the deformed ferrite (blue areas, Figure 4) shows a substructure consisting of cells or subgrains. Regions with a low QI inside the ferrite grains can be defined as dislocation walls [17,18]. The KAM map of ferrite shows that the highest local misorientations are located at the γ/γ and γ/α interfaces and at in-grain cell boundaries, where high dislocation densities prevail.…”

Section: Microstructural Analysismentioning

confidence: 99%

“…The interaction of the martensite and ferrite generates an earlier necking, which will be discussed on the following sections, and corroborates with the decreases of total elongation compared with AR-T sample as could be seen in Table 3. In addition to the end strain induced martensite transformation [4,18,19,22,[32][33][34][35]37].…”

Section: Mechanical Properties Evaluationmentioning

confidence: 99%

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Work hardening analysis in a lean duplex stainless Steel 2304 after low deformation by cold rolling

Alves¹,

Rodrigues²,

Santos³

2022

Tecnol. Metal. Mater. Min.

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The deformation mechanism of lean duplex stainless steel (LDSS) is overly complex not only by their dual phase microstructure, but also due to metastable austenite, which can deform by different mechanisms and transform to martensite by strain. The purpose of this study was to investigate the mechanisms of deformation by tensile test on low deformed cold-rolled samples (4%-22%) of a 2304 LDSS. The microstructure was analyzed by X-ray diffraction, optical microscopy, electron backscattered diffraction and transmission electron microscopy. It was observed the formation of mechanical twinning, ε-martensite, and α'-martensite which evidenced the TRIP effect. The strain hardening rate was calculated and analyzed by Holomon and Crussard-Jaoul modeling together with instantaneous strain hardening exponent, and three operating mechanisms were observed: twinning, dislocations slipping, and strain induced martensite formation (SIM). Brass texture had compromised SIM transformation. The fractography analysis of tensile specimens showed quasi-cleavage occurrence, and dimples formation for this range of pre-deformation.

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Section: Fractography Analysismentioning

confidence: 86%

Section: Microstructural Analysismentioning

confidence: 99%

Section: Mechanical Properties Evaluationmentioning

confidence: 99%

See 1 more Smart Citation

Work hardening analysis in a lean duplex stainless Steel 2304 after low deformation by cold rolling

Alves¹,

Rodrigues²,

Santos³

2022

Tecnol. Metal. Mater. Min.

View full text Add to dashboard Cite

show abstract

“…The Johnson-Cook phenomenological equation, which contains four independent adjustable parameters (three of them are used to describe the static flow stress and one is to describe the strain rate effect), is widely used for high speed metal forming processes [27]. However, comparisons between the existing plastic flow models with the static experimental stress strain data [28,29] showed that Voce [8] model has a better description of the flow behaviour for metallic materials. The good applicability of Voce model was also verified by experiment [30].…”

Section: Plastic Flow Lawmentioning

confidence: 99%

Extension of Flow Behaviour and Damage Models for Cast Iron Alloys with Strain Rate Effect

Liu,

Sun,

Zhang

et al. 2024

Chin. J. Mech. Eng.

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Cast iron alloys with low production cost and quite good mechanical properties are widely used in the automotive industry. To study the mechanical behavior of a typical ductile cast iron (GJS-450) with nodular graphite, uni-axial quasi-static and dynamic tensile tests at strain rates of 10−4, 1, 10, 100, and 250 s−1 were carried out. In order to investigate the influence of stress state on the deformation and fracture parameters, specimens with various geometries were used in the experiments. Stress strain curves and fracture strains of the GJS-450 alloy in the strain rate range of 10−4 to 250 s−1 were obtained. A strain rate-dependent plastic flow model was proposed to describe the mechanical behavior in the corresponding strain-rate range. The available damage model was extended to take the strain rate into account and calibrated based on the analysis of local fracture strains. Simulations with the proposed plastic flow model and the damage model were conducted to observe the deformation and fracture process. The results show that the strain rate has obviously nonlinear effects on the yield stress and fracture strain of GJS-450 alloys. The predictions with the proposed plastic flow and damage models at various strain rates agree well with the experimental results, which illustrates that the rate-dependent plastic flow and damage models can be used to describe the mechanical behavior of cast iron alloys at elevated strain rates. The proposed plastic flow and damage models can be used to describe the deformation and fracture analysis of materials with similar properties.

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Comprehending the coupled effect of multiple microstructure defects on the passive film features and pitting behavior of UNS S32101 in simulated seawater

Deng

et al. 2022

Electrochimica Acta

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The dependences of deformation temperature on the strain-hardening characteristics and fracture behavior of Mn–N bearing lean duplex stainless steel

Cited by 17 publications

References 46 publications

Work hardening analysis in a lean duplex stainless Steel 2304 after low deformation by cold rolling

Work hardening analysis in a lean duplex stainless Steel 2304 after low deformation by cold rolling

Extension of Flow Behaviour and Damage Models for Cast Iron Alloys with Strain Rate Effect

Comprehending the coupled effect of multiple microstructure defects on the passive film features and pitting behavior of UNS S32101 in simulated seawater

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