Strain rate effects on tensile deformation behaviors for Fe–22Mn–0.6C–(1.5Al) twinning-induced plasticity steel

Yang, Haokun; Zhang, Z.J.; Dong, F.Y.; Duan, Qingling

doi:10.1016/j.msea.2014.04.043

Cited by 83 publications

(47 citation statements)

References 57 publications

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“…3(a). [36][37][38][39][40][41][42] The variations in flow stress and tensile strength stem from a reduction in work hardening capacity ( Fig. 3(b)), which is referred to as negative strain rate sensitivity (NSRS).…”

Section: Negative Strain Rate Sensitivity Of Flow Stressmentioning

confidence: 99%

Overview of Dynamic Strain Aging and Associated Phenomena in Fe–Mn–C Austenitic Steels

2018

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This paper presents an overview of the recent works on dynamic strain aging (DSA) of Fe-Mn-C austenitic steels including Hadfield and twinning-induced plasticity (TWIP) steels. First, a model of the DSA mechanism and its controlling factors are briefly explained in terms of Mn-C coupling and dislocation separation. Then, we introduce the effects of DSA on mechanical properties such as work hardening capability, uniform elongation, post-uniform elongation, and fatigue strength. Specifically, we note (1) the pinning effect on extended dislocation for the work hardening, (2) the Poretvin-Le Chatelier banding effect on damage evolution for the tensile elongation, and (3) the crack tip hardening/softening effect on crack resistance for the fatigue strength. We believe that this overview will help in designing advanced highstrength steels with superior ductility and fatigue resistance.

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Section: Negative Strain Rate Sensitivity Of Flow Stressmentioning

confidence: 99%

Overview of Dynamic Strain Aging and Associated Phenomena in Fe–Mn–C Austenitic Steels

2018

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“…The 2D composition-dependent stacking fault energy (SFE) map in Figure 9a summarizes the reported steels in the Fe-Mn-C system that exhibit serration flow during deformation. One can see that serration flow occurs in the high-Mn TRIP/TWIP steels of the Fe-Mn-C system that cover a wide range of chemical compositions [3,8,[50][51][52][53][54][55][56][57][58][59]. once and propagate.…”

Section: Discussionmentioning

confidence: 99%

“…The strong increase in energy for r C-C,min ≈ 3.55 Å in structure (2) in particular confirmed this general trend. For structures (3) and (4), the smallest r C-C,min is always approx. 3.77 Å, making a comparison difficult.…”

Section: Ab Initio Calculationsmentioning

confidence: 99%

“…Marceau et al [18] stated the difficulties in analyzing the short-range ordered clusters in Fe-Mn-C steels, such as the correlated field evaporation of interstitial C, detection of C as a molecular ion species, and surface migration of C (directional walk). In contrast, small angle neutron scattering (SANS) makes it possible to characterize the nano-sized SRO/short-range clusters (SRC) in the mm 3 volume range.…”

Section: Of 16mentioning

confidence: 99%

“…High-Mn (15-30 wt %) austenitic steels are well known for their high ultimate tensile strength over 1000 MPa and total elongation over 60% at room temperature [1][2][3][4]. Due to the excellent strain hardening of the high-Mn steels, the superior combination of high strength and ductility makes these steel grades a good choice for the automotive industry for the manufacture of complex body geometries, yielding improved crashworthiness and reduced weight at the same time [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the Mn–C Short-Range Ordering in a High-Strength High-Ductility Steel: Small Angle Neutron Scattering and Ab Initio Investigation

Song

Bogdanovski

Yildiz

et al. 2018

Metals

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Abstract:The formation of Mn-C short-range ordering (SRO) has a great influence on the mechanical properties of high-Mn steels. In the present work, the formation of Mn-C SRO during recrystallization of an X60Mn18 steel was investigated by means of a combined study employing small angle neutron scattering (SANS) and ab initio ground-state energy calculations based on density-functional theory. The SANS measurements prove the presence of Mn-C SRO in the recrystallization annealed X60Mn18 steel and indicate the evolution of the SRO during recrystallization. The results show that with the increase in annealing time, the mean size of the Mn-C SRO decreases, whereas the number density increases. The ab initio calculations well describe the energetically favored condition of Mn-C SRO and provide the theoretical explanation of the clustering formation and evolution in the X60Mn18 steel. The stress-strain curve of the X60Mn18 steel exhibits a high strain-hardening rate and the plastic deformation is characterized with a series of serrations during a uniaxial tensile test. In the end, the correlation between Mn-C SRO and the serrated flow of high-Mn steels is further discussed.

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Revealing the Fracture Mechanism of Twinning‐Induced Plasticity Steels

Luo

Huang

2018

steel research int.

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In the present study, the fracture mechanisms of smooth and notched specimens of a high manganese twinning‐induced plasticity (TWIP) steel are investigated quantitatively and compared to that of commercial 304 stainless (304SS) steel and interstitial free (IF) steel. The results show that the dominant fracture mechanism of TWIP steel can either be the formation of void sheets or the propagation of quasi‐cleavage cracks, while the fracture mechanism of 304SS and IF steel are void coalescence. The authors suggest that the special fracture mechanism of TWIP steel is responsible to its limited post elongation, high notch sensitivity, and low fracture toughness.

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Strain rate effects on tensile deformation behaviors for Fe–22Mn–0.6C–(1.5Al) twinning-induced plasticity steel

Cited by 83 publications

References 57 publications

Overview of Dynamic Strain Aging and Associated Phenomena in Fe–Mn–C Austenitic Steels

Overview of Dynamic Strain Aging and Associated Phenomena in Fe–Mn–C Austenitic Steels

On the Mn–C Short-Range Ordering in a High-Strength High-Ductility Steel: Small Angle Neutron Scattering and Ab Initio Investigation

Revealing the Fracture Mechanism of Twinning‐Induced Plasticity Steels

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