Energy-based approach to predict the fatigue life behavior of pre-strained Fe–18Mn TWIP steel

Kim, Young Kook; Kim, Gyosung; Hong, Seong-Gu; Lee, Chong Soo

doi:10.1016/j.msea.2011.02.068

Cited by 53 publications

(25 citation statements)

References 30 publications

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“…Mechanical twins were not observed to form during cyclic loading of the TWIP steels studied, even though they were observed extensively in these same steels under monotonic loading [67]. In another study, under uniaxial fatigue (R ¼ 0.1), on a C-free Fe-18Mn-0.2Si-0.05Al TWIP steel [128], the fatigue limit (based on stress amplitude) was higher at 570 MPa. The ratio of fatigue limit to UTS under these conditions for this alloy is 0.57.…”

Section: Materials Performance and Characterizationmentioning

confidence: 79%

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Performance and Characterization of TWIP Steels for Automotive Applications

Neu

2013

Matls. Perf. Charact.

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This article reviews the current state of the art in understanding twinning-induced plasticity (TWIP) steels with an emphasis on linking microstructure to mechanical behavior by means of microstructure-aware constitutive models. A materials selection exercise is conducted to substantiate that TWIP steels are more desirable than most other materials for use in structural and safety components of automobiles. Gaps in the knowledge of TWIP steels that are hindering their adoption for automotive applications are identified. This review concludes by suggesting fundamental research needs for promoting the design of TWIP steels with improved properties and performance for structural components in automotive applications.

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Section: Materials Performance and Characterizationmentioning

confidence: 79%

“…There is relatively little work reported on the fatigue behavior of TWIP steels; stress-life data have been reported for only a small number of TWIP steels under either bending fatigue [67,126,127] or uniaxial fatigue [128,129]. Even fewer data have been reported on strain-life [47] and fatigue crack growth [130].…”

Section: Fatiguementioning

confidence: 99%

Performance and Characterization of TWIP Steels for Automotive Applications

Neu

2013

Matls. Perf. Charact.

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“…Both prestraining [8,15,16] or grain refinement [12,14] have been proved to be effective strategies to increase the fatigue strength. During cyclic loading, TWIP steels may display cyclic hardening and/or cyclic softening depending on the initial microstructure and applied stress/strain amplitude [8][9][10]16]. Such behavior has also been reported in the austenitic stainless steels, with the cyclic hardening and softening explained as the dislocation multiplication and rearrangement, respectively [17].…”

Section: Introductionmentioning

confidence: 69%

“…Previous studies in the cyclic deformation of TWIP steels were generally focused on the fatigue property and the cyclic stability [7][8][9][10]. It was reported that TWIP steels exhibit a fatigue limit (FL) close to the yield stress (YS) [7,8,11,12], which is not superior compared to other steel grades [13,14].…”

Section: Introductionmentioning

confidence: 99%

Evolution of dislocations and twins in high cycle fatigue of a twinning-induced plasticity steel

Wang

Liang

Liu

et al. 2015

Materials Science and Engineering: A

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“…[2][3][4][5][6][7][8][9][10] Generally, most automobile parts are under cyclic loading condition during their service, thus, the fatigue resistance is one of the key factors for the practical utilization of TWIP steels. There are many reports about the low-cycle fatigue properties of TWIP steels, [11][12][13][14][15][16] and the pre-strain method was developed to improve their low-cycle fatigue properties. [11,16] As for the high-cycle fatigue, there have been some investigations about the bending fatigue properties of TWIP steels.…”

mentioning

confidence: 99%

Improving the High-Cycle Fatigue Lives of Fe-30Mn-0.9C Twinning-Induced Plasticity Steel Through Pre-straining

Wang

Zhang

Shao

et al. 2015

Metall Mater Trans A

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The tensile properties, high-cycle fatigue properties, and microstructure evolutions during fatigue process of asreceived and pre-strained Fe-30Mn-0.9C twinning-induced plasticity (TWIP) steel were investigated. It is found that the fatigue lives of the TWIP steel can be effectively improved through pre-straining, since the deformation twins induced by pre-straining could effectively lead to the improved yield strength and the homogenized deformation. This study may provide possible ways for improving the high-cycle fatigue properties of TWIP steels.In recent years, the advanced high-strength steels have been widely used in automobile industry to satisfy the weight reducing, energy saving, and security principles of new generation cars. [1] Twinning-induced plasticity (TWIP) steels have an excellent combination of high strength and good ductility, so that they are very attractive for automotive industry; therefore, much attention has been paid on the development of TWIP steels. So far, researchers mainly focus on the alloy designing, basic mechanical properties, and the corresponding microstructure evolution during deformation of TWIP steels. [2][3][4][5][6][7][8][9][10] Generally, most automobile parts are under cyclic loading condition during their service, thus, the fatigue resistance is one of the key factors for the practical utilization of TWIP steels. There are many reports about the low-cycle fatigue properties of TWIP steels, [11][12][13][14][15][16] and the pre-strain method was developed to improve their low-cycle fatigue properties. [11,16] As for the high-cycle fatigue, there have been some investigations about the bending fatigue properties of TWIP steels. [17][18][19][20] Hamada et al. [17][18][19] and Karjalainen et al. [20] showed that TWIP steels have quite high bending fatigue strength. However, there are no research findings on the high-cycle fatigue properties of the TWIP steels under axial loading, and the effects of pre-strain on the high-cycle fatigue properties are still not clear so far.In order to improve the fundamental understanding on the axial high-cycle fatigue behaviors of TWIP steels and supplement experimental data, the axial high-cycle fatigue tests of as-received and pre-strained Fe-30Mn-0.9C TWIP steel were performed and the corresponding microstructure evolutions were observed in the current study. The main goal of the current study is to explore further improvement of the high-cycle fatigue properties of TWIP steel via pre-straining.In this study, Fe-30Mn-0.9C (wt pct) TWIP steel was used. The cast ingot was austenized at 1473 K (1200°C) for 4 h, then immediately hot forged into plate with final dimension of 40 9 100 mm 2 at 1223 K to 1473 K (950°C to 1200°C), and finally cooled in air. The plate was annealed at 1323 K (1050°C) for 1 hour and water-quenched, and then dog-bone shaped tensile and fatigue specimens were cut into sectional dimensions of 15 9 3 9 3 and 10 9 5 9 4 mm 3 from the annealed plate, respectively; and the length direction of tensile and fatigue specimen...

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Energy-based approach to predict the fatigue life behavior of pre-strained Fe–18Mn TWIP steel

Cited by 53 publications

References 30 publications

Performance and Characterization of TWIP Steels for Automotive Applications

Performance and Characterization of TWIP Steels for Automotive Applications

Evolution of dislocations and twins in high cycle fatigue of a twinning-induced plasticity steel

Improving the High-Cycle Fatigue Lives of Fe-30Mn-0.9C Twinning-Induced Plasticity Steel Through Pre-straining

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