High-cycle fatigue properties and damage mechanisms of pre-strained Fe-30Mn-0.9C twinning-induced plasticity steel

Wang, B.; Zhang, P.; Duan, Qingling; Zhang, Z.J.; Yang, H.J.; Pang, J.C.; Tian, Yanzhong; Li, X.W.; Zhang, Z.F.

doi:10.1016/j.msea.2016.10.043

Cited by 51 publications

(10 citation statements)

References 47 publications

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“…Numerous studies investigated the influence of pre-deformation [35,36] on the fatigue stress limit and how fatigue lifetimes of high-manganese TWIP steels can be extended by increasing the tensile strength, e.g., by an ultra-fine-grained microstructure or by plastic deformation before testing [37,38].…”

Section: Introductionmentioning

confidence: 99%

Surface Morphology and Its Influence on Cyclic Deformation Behavior of High-Mn TWIP Steel

Klein

Smaga

Beck

2018

Metals

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In this study, the dependence of the cyclic deformation behavior on the surface morphology of metastable austenitic HSD® 600 TWinning Induced Plasticity (TWIP) steel was investigated. This steel—with the alloying concept Mn-Al-Si—shows a fully austenitic microstructure with deformation-induced twinning at ambient temperature. Four different surface morphologies were analyzed: as-received with a so-called rolling skin, after up milling, after down milling, and a reference morphology achieved by polishing. The morphologies were characterized by X-Ray Diffraction (XRD), Focused Ion Beam (FIB), Scanning Electron Microscopy (SEM) as well as confocal microscopy methods and show significant differences in initial residual stresses, phase fractions, topographies and microstructures. For specimens with all variants of the morphologies, fatigue tests were performed in the Low Cycle Fatigue (LCF) and High Cycle Fatigue (HCF) regime to characterize the cyclic deformation behavior and fatigue life. Moreover, this study focused on the frequency-dependent self-heating of the specimens caused by cyclic plasticity in the HCF regime. The results show that both surface morphology and specimen temperature have a significant influence on the cyclic deformation behavior of HSD® 600 TWIP steel in the HCF regime.

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Section: Introductionmentioning

confidence: 99%

Surface Morphology and Its Influence on Cyclic Deformation Behavior of High-Mn TWIP Steel

Klein

Smaga

Beck

2018

Metals

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“…Besides, the fatigue strength coefficient

σ_{f}^{'}

is cyclic stress corresponding to N f = 1 (and to a good approximation, equals the true fracture strength, corrected for necking, in a monotonic tension test for most metals), but it is hard to establish a simple relation between

σ_{f}^{'}

and true fracture strength. It is found that the

σ_{f}^{'}

enhances with increasing tensile strength . However, the relationship between the

σ_{f}^{'}

and s is linear in this paper, but not monotonically increasing or decreasing, so that this needs further study in the future.…”

Section: Discussionmentioning

confidence: 65%

A prediction method for fatigue life of large moving components as function of scale factor: A case of motor‐generator rotor

Pan

Pang

Zhang

et al. 2017

Fatigue Fract Eng Mat Struct

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With the development of science and technology, more and more large moving components have been used in industry, and their service lives have become an important issue. After analysis of the previous results, considering the scale factor, a prediction method for fatigue life of large moving components based on the Basquin relation was proposed at first, and then the magnet pole part of motor‐generator rotor was chosen to make simulation parts with different scale factors mainly in terms of their S‐N curves and fractographies. It was found that with the change of specimen scale factor, the stress concentration factor at transition arc is almost unchanged as well as the fatigue strength exponent, and the fatigue strength coefficient changes linearly. Based on those results, a life prediction method was validated, and the results show that this method is a simple but more precise relation. After fatigue fracture surface and crack growth angle observations and quantitative analyses, the fatigue damage mechanisms associated with the relation among fatigue strength exponent and coefficient and scale factors were explained well. Those studies will provide a new clue to the prediction of the service life for those large moving components.

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“…Firstly, the high SFE indicates that the width of SF decreases, and then the interaction between C atoms and partial dislocation dies away . Secondly, the twinning nucleus exhausted above engineering strain of 0.5 in Fe–30Mn – 0.9C steel, indicating that the formation of SFs is suppressed at high strain above 0.5 . These two factors jointly suppress the DSA effect in Fe–22Mn–1.0C steel above temperature of 443 K, and then the DSA effect and the related PLC band are destroyed.…”

Section: Resultsmentioning

confidence: 99%

Dramatic Increase of Strength and Ductility in Fe–22Mn–1.0C Twinning‐Induced Plasticity Steel at Elevated Temperature

2018

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Tensile properties and microstructural evolutions of Fe-22Mn-1.0C (wt%) twinning-induced plasticity steel are investigated in the temperature range from 293 to 443 K. An unexpected enhancement of strength and ductility is observed at the elevated temperature of 443 K (%400 MPa ultimate tensile strength and %10% true strain improvements). The twinning capability is still kept stable with the increasing temperature, and the premature fracture is postponed by suppressing dynamic strain aging effect. As a result, the synchronous improvement of strength and plasticity is achieved at high deformation temperature.

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High-cycle fatigue properties and damage mechanisms of pre-strained Fe-30Mn-0.9C twinning-induced plasticity steel

Cited by 51 publications

References 47 publications

Surface Morphology and Its Influence on Cyclic Deformation Behavior of High-Mn TWIP Steel

Surface Morphology and Its Influence on Cyclic Deformation Behavior of High-Mn TWIP Steel

A prediction method for fatigue life of large moving components as function of scale factor: A case of motor‐generator rotor

Dramatic Increase of Strength and Ductility in Fe–22Mn–1.0C Twinning‐Induced Plasticity Steel at Elevated Temperature

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