Effects of dislocation slip mode on high-cycle fatigue behaviors of ultrafine-grained Cu–Zn alloy processed by equal-channel angular pressing

Zhang, Z.J.; An, Xianghai; Zhang, P.; Yang, Maosheng; Yang, Gang; Wu, Shijing; Zhang, Z.F.

doi:10.1016/j.scriptamat.2012.10.036

Cited by 63 publications

(23 citation statements)

References 31 publications

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“…Similar trends were also found under the common LCF and HCF tests of Cu-Al [25,26] (see Fig. 1c and d) and analogous Cu-Zn alloy systems [27,28]. Moreover, a synchronous improvement of strength and plasticity can also be achieved by increasing Al content, which has been experimentally confirmed in Cu-Al alloys processed by severe plastic deformation (SPD) and subsequent annealing [21,22,29,30] (see Fig.…”

Section: Fatigue Lifesupporting

confidence: 73%

Extremely-low-cycle fatigue behaviors of Cu and Cu–Al alloys: Damage mechanisms and life prediction

et al. 2015

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Section: Fatigue Lifesupporting

confidence: 73%

Extremely-low-cycle fatigue behaviors of Cu and Cu–Al alloys: Damage mechanisms and life prediction

et al. 2015

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“…[10][11][12][13][14] Recent results revealed that decreasing the stacking fault energy (SFE) via alloying design can significantly increase the fatigue strengths of the NC Cu-Al and Cu-Zn alloys processed by equal channel annular pressing (ECAP) through the enhancement of their tensile strengths and stabilization of the nanostructure via critically restricting the relevant mechanisms. [15,16] As well known, severe plastic deformation (SPD) processes remarkably affect the formation of nanostructures and corresponding mechanical properties. [17,18] Compared with ECAP, high-pressure torsion (HPT), another popular SPD technique, can produce remarkably finer grains and a higher fraction of high-angle grain boundaries (GBs) and then harvest higher tensile strengths.…”

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confidence: 99%

“…This implies that SFE does play an intrinsic role in the fatigue strength, regardless of the kinds of SPD techniques applied, as revealed in Table 1. [15,16] Based on the well-known Basquin law, the reversal fatigue life is closely related to the stress amplitude in a fully reversed, constant-amplitude fatigue test as expressed in the following form [10]:…”

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confidence: 99%

“…[6][7][8][11][12][13][14][15][16] As grain coarsening is a thermally activated process, [7,8,11,14] lowering the SFE by alloying can essentially restrict the closely relevant mechanisms, decrease the GB energy and then confine the GB migration. [16,31,32] Besides, the formation of twins with low excess energy, the interaction between Al atoms with GBs and the formation of short-range order (SRO) are also beneficial to the improvement of microstructures stability.…”

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Improved Fatigue Strengths of Nanocrystalline Cu and Cu–Al Alloys

Lin

Sheng

et al. 2015

Materials Research Letters

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“…[23,24] As the values of r f ¢ and b are closely related to the true fracture strength and fatigue damage degree, respectively, improving the tensile strength and inhibiting the fatigue damage are two effective procedures to enhance the final fatigue strength. [23][24][25][26] Through pre-straining of the Fe- 30Mn-0.9C TWIP steel in this study, it is found that the tensile strength remains unchanged (Figure 1(c)), so as discussed above, the fatigue strength coefficient r f ¢ should also remain the same after pre-straining. [22] Therefore, the improvement in the fatigue lives of the TWIP steel after pre-straining should be primarily owing to the increase of b, as schematically illustrated by Figure 4(b).…”

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confidence: 57%

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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Effects of dislocation slip mode on high-cycle fatigue behaviors of ultrafine-grained Cu–Zn alloy processed by equal-channel angular pressing

Cited by 63 publications

References 31 publications

Extremely-low-cycle fatigue behaviors of Cu and Cu–Al alloys: Damage mechanisms and life prediction

Extremely-low-cycle fatigue behaviors of Cu and Cu–Al alloys: Damage mechanisms and life prediction

Improved Fatigue Strengths of Nanocrystalline Cu and Cu–Al Alloys

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

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