Effects of annealing treatment on the ratcheting behavior of extruded AZ31B magnesium alloy under asymmetrical uniaxial cyclic loading

Zhang, X. P.; Castagne, Sylvie; Gu, C.F.; Luo, Xuan

doi:10.1007/s10853-010-4883-8

Cited by 21 publications

(4 citation statements)

References 26 publications

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“…It has been established that the twinning-detwinning process dominates plastic deformation at higher strain amplitudes, whereas dislocation slips dominate the plastic deformation at lower strain amplitudes [26][27]39]. Experimental investigations reveal that the fatigue resistance and cyclic response are affected by various factors, including loading path [17,22,[30][31], strain rate [9,35], microstructure and texture [3,[10][11][12][13][14]16,[19][20]24,28,32,45], and stress ratio [6,34,43]. However, most studies concerning the fatigue behavior of Mg alloys are carried out by applying symmetric cyclic loading (fully reversed strain-or stress-controlled).…”

Section: Introductionmentioning

confidence: 99%

Cyclic deformation and fatigue of extruded AZ31B magnesium alloy under different strain ratios

Xiong

Jiang

2016

Materials Science and Engineering: A

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Cyclic deformation and fatigue behavior of extruded AZ31B magnesium (Mg) alloy were investigated under strain-controlled loading along the extrusion direction at different strain amplitudes with three strain ratios (ε = 1,). With a strain ratio of ε = , partial twinning-partial detwinning occurs at all strain amplitudes, leading to accumulation of deformation twins as the loading cycle is increased. With strain ratios being ε = and 1, partial twinning-complete detwinning is the cyclic deformation mechanism when the strain amplitude is higher than 0.35%. At a strain amplitude lower than 0.35%, dominant cyclic deformation mechanism is dislocation slips irrespective of the strain ratio. Compared with the cases of ε = and ε = , stronger cyclic hardening is exhibited at all the investigated strain amplitudes for ε =. Fatigue fracture surfaces show regions with lamellar-like and dimplelike features. Lamellar-like feature existing in the crack initiation and stable propagation region are mainly due to twinning-detwinning during cyclic deformation. The dimple-like feature formed in the unstable crack propagation and final rupture region mainly arises from severe intragranular plastic deformation by dislocation slips. At the same strain amplitude, the lamellar-like traces become more aggravated with a lower stain ratio. The strain-fatigue life curves exhibit a distinguishable kink at strain ratios ε = 1 and. The fatigue life with ε = shows the highest and that with is the lowest at the same strain amplitude. The Smith-Watson-Topper (SWT) fatigue criteria can correlate well the fatigue experiments of AZ31B Mg alloy under different strain ratios.

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Section: Introductionmentioning

confidence: 99%

Cyclic deformation and fatigue of extruded AZ31B magnesium alloy under different strain ratios

Xiong

Jiang

2016

Materials Science and Engineering: A

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“…In the last decade, investigations were made to understand the cyclic deformation behavior and low-cycle fatigue (LCF) of different wrought Mg alloys. The Mg alloys studied include extruded AZ31 [18][19][20][21][22][23][24][25][26][27][28][29][30][31], extruded AZ31B [32][33][34][35][36][37][38][39][40][41][42], extruded AZ61 [43][44][45][46][47][48][49][50], extruded ZK60 [51][52][53][54][55], rolled AZ31 [56][57][58][59][60][61][62][63], rolled AZ31B [64][65], rolled AZ91 [66]…”

Section: Introductionmentioning

confidence: 99%

Cyclic deformation and fatigue of extruded ZK60 magnesium alloy with aging effects

Dong

Jiang

Dong

et al. 2014

Materials Science and Engineering: A

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Monotonic and fully reversed strain-controlled cyclic deformation experiments were conducted on a ZK60 magnesium (Mg) alloy in as-extruded and T5 aged conditions in ambient air. It was observed that the aging process had a significant influence on the stress-strain response and the fracture stress and strain under both monotonic tension and monotonic compression but a marginal influence on the stabilized cyclic deformation and fatigue of the material. An Electron Backscatter Diffraction (EBSD) analysis revealed that double twins were formed under a large compression strain in the as-extruded Mg but were not observed in the aged state under monotonic compression. A kink point in the strain-life fatigue curve demarcates the influence of twinning-detwinning deformation on fatigue. No twinning occurred throughout the fatigue life of the material when the strain amplitude was lower than the kink point value. With a strain amplitude slightly above the kink point, twinning-detwinning occurred but the process diminished as the loading cycle increased. The aging process enhanced the kink point slightly from a strain amplitude of 0.32% to 0.35%. Only small amount residual twins were observed in the material after fatigue loading when the strain amplitudes were lower than 4%.

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“…The use of magnesium alloys in transportation vehicles involves unavoidably cyclic deformations and fatigue as the parts in the vehicles undergo cyclic stresses [1][2][3][4]. In materials and structures subjected to a cyclic stressing with non-zero mean stress, a cyclic accumulation of inelastic deformation will occur if the applied stress is high enough (ensuring that yielding occurs), which is called ratcheting or the ratcheting effect (some researchers also called it cyclic creep) [5][6][7][8]. Ratcheting effect produces not only undesirably large deformations but also fatigue damage in the material.…”

Section: Introductionmentioning

confidence: 99%

Uniaxial ratcheting and low-cycle fatigue failure behaviors of AZ91D magnesium alloy under cyclic tension deformation

Lin

Chen

2011

Journal of Alloys and Compounds

100

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Effects of annealing treatment on the ratcheting behavior of extruded AZ31B magnesium alloy under asymmetrical uniaxial cyclic loading

Cited by 21 publications

References 26 publications

Cyclic deformation and fatigue of extruded AZ31B magnesium alloy under different strain ratios

Cyclic deformation and fatigue of extruded AZ31B magnesium alloy under different strain ratios

Cyclic deformation and fatigue of extruded ZK60 magnesium alloy with aging effects

Uniaxial ratcheting and low-cycle fatigue failure behaviors of AZ91D magnesium alloy under cyclic tension deformation

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