Precipitation response of the magnesium alloy WE43 in strained and unstrained conditions

Kandalam, Sahithya; Avadhani, G. S.; Kumar, Sachin; Suwas, Satyam

doi:10.1016/j.jallcom.2014.09.179

Cited by 43 publications

(9 citation statements)

References 18 publications

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“…. Such platelet-shaped precipitates, recognized as β″ being a good thermal stability [12], are hardly dissolved into matrix, but gradually broken into fine ones during hot compression ( Fig. 6).…”

Section: Resultsmentioning

confidence: 99%

“…Yu et al [11] found that Mg 5 RE precipitation particles lead to grain refinement as a result of particle pinning in a Mg-11Gd-1Nd-1.5Zn-0.5Zr. Besides, it has been reported in WE43 alloys [12] that dynamic precipitation occurred during hot deformation leads to the formation of β 1 precipitation particles. Some recent works on common Mg alloys have shown that precipitation particles have effective potential to refine the grain size and modify the texture through dynamic recrystallization affected by the characteristics of precipitation particles, such as the size, volume fraction, distributions, etc.…”

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confidence: 96%

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Dynamic recrystallization behaviors of a Mg-4Y-2Nd-0.2Zn-0.5Zr alloy and the resultant mechanical properties after hot compression

et al. 2016

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The development behaviors of ultrafine grains (UFGs) due to continuous dynamic recrystallization (cDRX) were investigated in hot compression of a Mg-4Y-2Nd-0.2Zn-0.5Zr alloy pretreated in solution and subsequently peak-aging. In the aging sample containing statically precipitated particles (SPPs), the occurrence of cDRX starts to take place at medium to high strains, and finally a stable size of UFGs are fully developed in a whole volume. In the as-solution sample with no SPPs, by contrast, the size of UFGs evolved increases rapidly at lower strains, slowly at medium strains and then finally shows a bimodal distribution in high strain. In the latter, smaller grains accompanying with an incomplete formation of UFGs are developed by any effect of dynamically precipitated particles (DPPs). The microtexture evolved is effectively randomized in the regions of UFGs, leading to the formation of a weaker texture. The tensile elongation of the aging sample, with SPPs and a fully developed UFGs, was around 17.4 %. This was much higher than that of the as-solution one, with no SPPs and an incompletely developed UFGs, that was 11.8 %, which might result from the more randomized texture due to fully developed UFGs.

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Section: Resultsmentioning

confidence: 99%

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confidence: 96%

Dynamic recrystallization behaviors of a Mg-4Y-2Nd-0.2Zn-0.5Zr alloy and the resultant mechanical properties after hot compression

et al. 2016

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“…The precipitation reaction sequence is reported as follows: supersaturated solid solution →β″ (Mg3Y0.85Nd0.15) with hexagonal D019 super lattice → β′ (Mg12YNd) with body centered orthorhombic structure → β1 (Mg14YNd2) with FCC structure (a = 0.74 nm) → β (Mg14YNd2) with FCC structure (a = 2.223 nm) [6]. Two different chemistries of β1 phase have been reported such as Mg14Nd2Y [6] and Mg3RE [7]. Low temperature aging treatment at 150°C promoted the formation of coherent β″ precipitates that resulted in a peak hardness of 85 VHN after 500 minutes of aging.…”

Section: Introductionmentioning

confidence: 99%

“…This temperature is above the solvus temperature of β″ phase. Further increase in the aging temperature to 280°C caused formation of the equilibrium β phase and overaging [4,7,8].…”

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment conditions on the passivation behavior of WE43C Mg–Y–Nd alloy in chloride containing alkaline environments

Ninlachart

Karmiol

Chidambaram

et al. 2017

Journal of Magnesium and Alloys

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Mg-Y-Nd alloy (WE43C or Elektron 43) is a heat treatable magnesium wrought alloy that can be used up to 250°C for aerospace application. This alloy has excellent mechanical properties (UTS: up to 345 MPa at room temperature) and improved corrosion resistance. Electrochemical passivation studies were conducted on this alloy under different heat treatment conditions in 0.1 M NaOH solution with the addition of chloride from 0 to 1000 ppm. The passive potential range typically extended to more than 1.5 VAg/AgCl. The transpassive potential was not dependent on the heat treatment condition of the alloy when the chloride concentration increased up to 500 ppm. However, pitting protection potential varied with the heat treatment condition when the chloride addition was 500 ppm or more. The specimen surface was analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy to understand the passivation behavior of this alloy. The passivated surface of the WE43C specimens indicated that the surface layer consisted of MgO, Mg(OH)2, and rare earth oxide phases, and the heat treatment conditions did not significantly affect the composition of the surface film.

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“…Due to the commercial and scientific importance of Mg–Nd–Y–Zr alloy, a considerable number of papers attempt to gain a good understanding of the precipitation in the alloy . The precipitation sequence of Mg–Nd–Y is generally reported as S.S.S.S.–β″–β′–β1–β However, ambiguities remain over the precipitation due to the limit of characterization techniques and the inherent intricacy of the precipitate structures. It is undoubted that normal (HR) TEM brings us a certain amount of information about the precipitates, but the detailed structures are easily neglected or confused.…”

Section: Introductionmentioning

confidence: 99%

Precipitation in Mg–Nd–Y–Zr–Ca Alloy during Isothermal Aging: A Comprehensive Atomic‐Scaled Study by Means of HAADF‐STEM

Zheng

Luo

et al. 2016

Adv Eng Mater

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This paper investigates into the precipitation behavior of Mg-2Nd-1Y-0.1Zr-0.1Ca (wt%) alloy during isothermal aging at 225 C, using atomic-scale HAADF-STEM. The precipitation sequence in Mg-Nd-Y-Zr-Ca is identified as follows:From an engineering point of view, the atomic-size precipitates that distribute uniformly have a significant strengthening effect. In addition, the present study discusses three findings concerning the novel structures observed in the alloy: two types of interaction between needle-like precipitates are observed; the previously reported b 00 structure is doubted according to the analysis of the defects characterized from [11 20] Mg ; calcium is observed to be enriched in b1 precipitates and along grain boundaries.

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Precipitation response of the magnesium alloy WE43 in strained and unstrained conditions

Cited by 43 publications

References 18 publications

Dynamic recrystallization behaviors of a Mg-4Y-2Nd-0.2Zn-0.5Zr alloy and the resultant mechanical properties after hot compression

Dynamic recrystallization behaviors of a Mg-4Y-2Nd-0.2Zn-0.5Zr alloy and the resultant mechanical properties after hot compression

Effect of heat treatment conditions on the passivation behavior of WE43C Mg–Y–Nd alloy in chloride containing alkaline environments

Precipitation in Mg–Nd–Y–Zr–Ca Alloy during Isothermal Aging: A Comprehensive Atomic‐Scaled Study by Means of HAADF‐STEM

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