Microstructural evolution and strain hardening behavior of a novel two-stage warm rolled ultra-high strength medium Mn steel with heterogeneous structures

Zou, Yongming; Ding, Hua; Zhang, Yu; Tang, Zihan

doi:10.1016/j.ijplas.2022.103212

Cited by 63 publications

(7 citation statements)

References 84 publications

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“…Nevertheless, it has been shown that the additional annealing or tempering process has negligible influence on the mechanical properties and can therefore be removed [48,52]. During the WR process, a heterogeneous microstructure with lamellar and granular ferrite and retained austenite grains are formed via partial recrystallization [53][54][55]. The heterogeneous retained austenite grains with various mechanical stability lead to a gradual and steady martensitic transformation (i.e.…”

Section: Warm Rolling and Warm Stampingmentioning

confidence: 99%

“…TRIP effect) throughout the plastic deformation, resulting in excellent work hardening ability and ductility [50]. In addition to the TRIP hardening, the heterogeneous microstructure also leads to more significant deformation incompatibility and thus enhanced generation of geometrically necessary dislocations (GNDs), which also contributes to the strain hardening [55]. Further, the WR process also introduces a high density of dislocations into both ferrite and austenite [43,49].…”

Section: Warm Rolling and Warm Stampingmentioning

confidence: 99%

“…As the 3rd generation AHSS, MMS are particularly prone to HE essentially due to the complex microstructures and deformation behaviors [102,103]. In MMS, multiple phases, including ferrite, martensite and retained austenite, have different intrinsic strength and toughness [58,104,105], leading to deformation incompatibility [55]. The H diffusion rate and concentration are distinct in different phases, which would lead to various H distribution and interaction with microstructures [106].…”

Section: Hydrogen Embrittlementmentioning

confidence: 99%

“…The Lüders banding is a commonly observed plastic instability phenomenon in MMS [55]. Zhang et al [127] revealed the adverse effect of the Lüders band on resisting HE in a 0.14C-7.65Mn-1.49Al (wt.%) MMS, where the higher fraction of martensite formation induced by the larger Lüders strain and the associated higher local flow stress both contribute to the deterioration of HE resistance, as shown in figure 21.…”

Section: Effects Of Mechanical Behaviors On He Resistancementioning

confidence: 99%

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Recent developments and perspectives of advanced high-strength medium Mn steel: from material design to failure mechanisms

Huang

Liu

et al. 2022

Mater. Futures

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Advanced high-strength steels are key structural materials for the development of next-generation energy-efficient and environmentally friendly vehicles. Medium Mn steel, as one of the latest generation advanced high-strength steels, has attracted tremendous attentions over the past decade due to its excellent mechanical properties. Here, the state-of-the-art developments of medium Mn steel are systematically reviewed with focus on the following crucial aspects: (i) the alloy design strategies; (ii) the thermomechanical processing routes for the optimizations of microstructure and mechanical properties; (iii) the fracture mechanisms and toughening strategies; and (iv) the hydrogen embrittlement mechanisms and improvement strategies.

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Section: Warm Rolling and Warm Stampingmentioning

confidence: 99%

Section: Warm Rolling and Warm Stampingmentioning

confidence: 99%

Section: Hydrogen Embrittlementmentioning

confidence: 99%

Section: Effects Of Mechanical Behaviors On He Resistancementioning

confidence: 99%

See 2 more Smart Citations

Recent developments and perspectives of advanced high-strength medium Mn steel: from material design to failure mechanisms

Huang

Liu

et al. 2022

Mater. Futures

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“…The second-generation advanced high-strength steels (2nd AHSS), mainly including high-Mn twinning-induced plasticity (TWIP) steels and high-Mn TRIP steels, possesses outstanding strength and remarkable ductility [ 2 ]. The improvement of ductility is mainly based on the TWIP or TRIP effect [ 1 , 5 , 6 ], and the improvement of strength is mainly ascribed to the formation of precipitates [ 4 , 7 ] or grain refinement [ 8 , 9 ]. Numerous studies have demonstrated that the addition of alloying elements such as Mo, Nb, and V can enhance their strength or ductility [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Multi-Phase Grains Improving the Strength-Ductility Balance in Warm-Rolled Fe-18Mn-3Ti Steel

Li,

Liu,

Xia

et al. 2024

Materials

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The thermal properties, microstructure, and mechanical properties of Fe-18Mn-3Ti (wt%) were investigated, focusing on the effects of different heat-treatment processes. Results revealed that the 450 °C warm-rolling sample (450 WR) exhibited promising mechanical properties. Specifically, this sample displayed a yield strength of 988 MPa, an ultimate tensile strength of 1052 MPa, and total elongation of 15.49%. Consequently, a favorable strength-ductility balance was achieved. The strain-hardening ability surpassed that of the cold rolling sample (CR). Microstructure analysis indicated the simultaneous occurrence of dynamic equilibrium between grain deformation and re-crystallization because of the co-influence of thermal and strain in the warm rolling process. This desirable mechanical property was attributed to the presence of a multi-phase (α-martensite, austenite, and ε-martensite) and heterogeneous microstructure. The improvement of ultimate tensile strength was based on grain refinement, grain co-deformation, and the transformation-induced plasticity (TRIP) effect in the early stage of plastic deformation (stage Ⅰ). The improvement of ultimate elongation (TEL) was ascribed to the TRIP effect in the middle stage of plastic deformation (stage Ⅱ).

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Heterostructured Metallic Structural Materials: Research Methods, Properties, and Future Perspectives

Dong,

Gao,

Xiao

et al. 2024

Adv Funct Materials

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Heterostructured (HS) materials, characterized by heterogeneous zones with differences in mechanical or physical properties, represent a revolutionary advancement in material science. During deformation, hetero‐deformation‐induced (HDI) stress forms due to the synergistic interactions between soft and hard zones, leading to remarkable HDI strengthening and strain hardening. This mechanism significantly enhances their performance, surpassing that of traditional homogeneous materials. This review delves into the classification, preparation techniques, fundamental deformation mechanisms, and research methods of HS materials. It outlines the preparation methods of various HS materials, emphasizing their unique characteristics and applications. The review elaborates on the fundamental deformation mechanisms of HS materials, focusing on non‐uniform plastic deformation behavior and HDI strain hardening. Furthermore, it explores the application of heterogeneous design concepts in materials, analyzing their microstructure tuning mechanisms and mechanical properties. This review aims to serve as a critical reference for the future design and development of new HS metallic structural materials, paving the way for innovations that can transform multiple industries. By highlighting the long‐term impact, this review not only enhances the understanding of HS materials but also provides a roadmap for future research and industrial applications, positioning HS materials as key players in the advancement of material technology.

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Microstructural evolution and strain hardening behavior of a novel two-stage warm rolled ultra-high strength medium Mn steel with heterogeneous structures

Cited by 63 publications

References 84 publications

Recent developments and perspectives of advanced high-strength medium Mn steel: from material design to failure mechanisms

Recent developments and perspectives of advanced high-strength medium Mn steel: from material design to failure mechanisms

Heterogeneous Multi-Phase Grains Improving the Strength-Ductility Balance in Warm-Rolled Fe-18Mn-3Ti Steel

Heterostructured Metallic Structural Materials: Research Methods, Properties, and Future Perspectives

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