Low-cycle fatigue behavior of extruded Mg–10Gd–2Y–0.5Zr alloys

Zhu, Rong; Cai, Xiaotian; Wu, Ying; Liu, Lingli; Ji, Wenqing; Hua, Bo

doi:10.1016/j.matdes.2013.07.099

Cited by 27 publications

(27 citation statements)

References 19 publications

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“…[15,[35][36][37][38][39][40][41] Studies on the strain-controlled low-cycle fatigue behavior of RE-containing Mg alloys remain quite scarce to date. [17,24,32,[40][41][42][43][44][45][46][47] For example, Wang et al [32] studied the low-cycle fatigue behavior of extruded Mg-8.0Gd-3.0Y-0.5Zr (GW83) alloy under fully reversed strain-controlled tension-compression loading along the extrusion direction. Wu et al [42] investigated the strain-controlled low-cycle fatigue properties of a Mg-10Gd-2.0Y-0.46Zr alloy at 573 K (300°C).…”

Section: Introductionmentioning

confidence: 99%

Cyclic Deformation Behavior of a Rare-Earth Containing Extruded Magnesium Alloy: Effect of Heat Treatment

Mirza

Chen

et al. 2014

Metall Mater Trans A

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The present study was aimed at evaluating strain-controlled cyclic deformation behavior of a rareearth (RE) element containing Mg-10Gd-3Y-0.5Zr (GW103K) alloy in different states (as-extruded, peak-aged (T5), and solution-treated and peak-aged (T6)). The addition of RE elements led to an effective grain refinement and weak texture in the as-extruded alloy. While heat treatment resulted in a grain growth modestly in the T5 state and significantly in the T6 state, a high density of nano-sized and bamboo-leaf/plate-shaped b¢ (Mg 7 (Gd,Y)) precipitates was observed to distribute uniformly in the a-Mg matrix. The yield strength and ultimate tensile strength, as well as the maximum and minimum peak stresses during cyclic deformation in the T5 and T6 states were significantly higher than those in the as-extruded state. Unlike RE-free extruded Mg alloys, symmetrical hysteresis loops in tension and compression and cyclic stabilization were present in the GW103K alloy in different states. The fatigue life of this alloy in the three conditions, which could be well described by the Coffin-Manson law and Basquin's equation, was equivalent within the experimental scatter and was longer than that of RE-free extruded Mg alloys. This was predominantly attributed to the presence of the relatively weak texture and the suppression of twinning activities stemming from the fine grain sizes and especially RE-containing b¢ precipitates. Fatigue crack was observed to initiate from the specimen surface in all the three alloy states and the initiation site contained some cleavage-like facets after T6 heat treatment. Crack propagation was characterized mainly by the characteristic fatigue striations.

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Section: Introductionmentioning

confidence: 99%

Cyclic Deformation Behavior of a Rare-Earth Containing Extruded Magnesium Alloy: Effect of Heat Treatment

Mirza

Chen

et al. 2014

Metall Mater Trans A

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“…Since I-phase particles can inhibit the grain boundary motion, it will inhibit the recrystallization grain growth, i.e., the I-phase particle precipitation can cause Ġ to fall. In addition, when the I-phase particles grow to a certain size, it will stimulate the nucleation rate of Ṅ, which is considered as particle stimulated nucleation (PSN) [20,[34][35][36][37], i.e., the I-phase particle precipitation can make Ṅ larger. In this sense, according to the Eq.…”

Section: Grain Refinementmentioning

confidence: 99%

Effects of cyclic extrusion and compression parameters on microstructure and mechanical properties of Mg–1.50Zn–0.25Gd alloy

et al. 2015

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“…The study utilized digital image correlation to map the development of localized plastic strains and subsequent cracking of intergranular brittle phases leading to LCF failure. Another RE alloy Mg‐10Gd‐2Y‐0.5Zr alloy (GW102k) in the as‐extruded condition has been evaluated for LCF in Zhu et al Interestingly, it was found that the GW102k alloy lasts longer than the conventional AZ31 alloy. LCF behavior of a cast Mg‐3.5Y‐2.4Nd‐0.5Zr alloy in the T6 and a modified T6 heat treatment condition has been studied in Li et al The modified T6 heat treatment resulted in higher strength and longer fatigue life, which was attributed to more complete phase transformation of β " to fine and dense β ' precipitates.…”

Section: Introductionmentioning

confidence: 99%

Low‐cycle fatigue behavior of rolled WE43‐T5 magnesium alloy

Ghorbanpour

McWilliams

Knežević

2019

Fatigue Fract Eng Mat Struct

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This paper describes the main results from an investigation into the strength and low‐cycle fatigue (LCF) behavior of a rolled plate of WE43 Mg alloy in its T5 condition at room temperature. The alloy was found to exhibit small tension/compression yield asymmetry and small anisotropy being stronger in transverse direction (TD) than in rolling direction (RD) along with some anisotropy in strain hardening. The LCF tests were conducted under strain‐controlled conditions with the strain amplitudes ranging from 0.6% to 1.4% without the mean strain component. While the stress amplitudes during the LCF were higher for tests along TD than RD, the LCF life was similar for both directions. As revealed by electron microscopy, the fractured surfaces under tension consisted mainly of microvoid coalescence with some transgranular facets, while those fractured in LCF showed a combination of intergranular fracture and transgranular facets with minor content of microvoid coalescence.

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Low-cycle fatigue behavior of extruded Mg–10Gd–2Y–0.5Zr alloys

Cited by 27 publications

References 19 publications

Cyclic Deformation Behavior of a Rare-Earth Containing Extruded Magnesium Alloy: Effect of Heat Treatment

Cyclic Deformation Behavior of a Rare-Earth Containing Extruded Magnesium Alloy: Effect of Heat Treatment

Effects of cyclic extrusion and compression parameters on microstructure and mechanical properties of Mg–1.50Zn–0.25Gd alloy

Low‐cycle fatigue behavior of rolled WE43‐T5 magnesium alloy

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