Microstructures and mechanical properties of the age hardened Mg–4.2Y–2.5Nd–1Gd–0.6Zr (WE43) microalloyed with Zn

Kang, Yue; Wu, Di; Chen, Rongshi; Han, En‐Hou

doi:10.1016/j.jma.2014.01.010

Cited by 62 publications

(30 citation statements)

References 19 publications

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“…Lower ageing temperatures will lead to higher peak age hardness [11], but higher ageing temperature keeps the time for peak ageing low and the ductility at a moderate level. In accordance with [12] peak ageing at 250 °C was expected within 10 hours. To avoid natural ageing the T6 treatment was done within a few hours after T4 or samples were stored in refrigerator temperatures.…”

Section: Methodssupporting

confidence: 78%

“…Two hot extruded Mg-Y-RE alloys are used in this study and contain slightly smaller amounts of total alloying additions compared with the commercial WE43 [8]. Alloys of WE type are conventionally used in the T6 condition and the intermetallic particles are fully characterized [9][10][11][12]. Intermetallic particles Mg12Nd and Mg14Y4Nd are both observed in Mg-Y-Nd and the mechanical properties of the alloy depend strongly on the volume fraction and spatial distribution of these intermetallic phases.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and Corrosion Properties of Two Precipitation-Hardened Mg-Y-Nd-Gd-Dy Alloys with Small Changes in Chemical Composition

Maier

Lauth

Mendis

et al. 2019

JOM

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Nd alloys is based on finely dispersed particles an effective strengthening mechanism to achieve high strength at moderate ductility. However, these particles often affect corrosion by being more noble than the matrix. Biodegradable implant materials should show a corrosion rate fit to its application but should be free of pitting corrosion. Especially deep and narrow pits act as notches and cause increased mechanical stress leading into early failure. WE43 has already shown to have an acceptable biological response. In this study two Mg-Y-Nd-Gd-Dy alloys, WE32 and WE33, in extruded, solution and precipitation heat-treated conditions have been investigated. The difference in alloy composition is not very high. Solution heat treatment causes grain growth and strength loss. The ageing response to peak hardness depends on the temperature. A rather short ageing response was observed for 250 °C and for 200 °C highest hardness has been found at longer ageing time, but higher hardness compared to 250 °C. Grain growth during ageing is not significant. The higher alloyed alloy WE33 shows better mechanical strength, but less ductility. Corrosion was evaluated with immersion and potentiodynamic polarization in Ringer Acetate solution. The corrosion rate strongly depends on the alloy and heat treatment condition as well as on the test method. The highest corrosion rate is observed in the T4 condition. The peak aged alloy shows the lowest corrosion rate, but non-uniform corrosion-in this evaluated by the pitting factor.

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Section: Methodssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Mechanical and Corrosion Properties of Two Precipitation-Hardened Mg-Y-Nd-Gd-Dy Alloys with Small Changes in Chemical Composition

Maier

Lauth

Mendis

et al. 2019

JOM

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show abstract

“…And compression strength (UCS), elongation and microhardness (HV) for the dissolvable fracturing balls should exceed 360 MPa, 20% and 60 HV, respectively [2,6,7]. Moreover, WE series alloys balancing magnesium (Mg), yttrium (Y), neodymium (Nd), and zirconium (Zr) have excellent mechanical properties [8][9][10][11]. The values of UCS, elongation and HV of Mg-4Y-3Nd-0.5Zr (WE43) after T5 heat treatment are 490 MPa, 18% and 70 HV, respectively [12,13].…”

Section: Introductionmentioning

confidence: 99%

Effects of semi-solid treatment by electro-magnetic induction on micro-structure evolution and mechanical properties of the Mg-2.4Y-4Nd-0.5Zr-1Ni alloys

Zhang

Fan

Zhou

et al. 2020

Mater. Res. Express

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The semi-solid billets of Mg-2.4Y-4Nd-0.5Zr-1Ni (WE34-1Ni) alloys are fabricated by electromagnetic induction heating semi-solid treatment at 2.05 kW and 4.10 kW from 580°C to 625°C. In this work, the microstructure evolution and mechanical properties of WE34-1Ni alloys are investigated, and the results reveal that with increasing semi-solid temperatures, the average grain size of the solid globules and liquid fraction at the grain boundary gradually increase while the shape factor fluctuates slightly. Compared with 2.05 kW power, the semi-solid billet with 4.10 kW power at 625°C has more fine homogeneous grains, the lower average size of the solid globules, more liquid fraction. The semi-solid billet with 4.10 kW at 625°C obtains ideal semi-solid spheroid structure with the solid grains surrounded by a small amount of liquid pools and the best mechanical properties of the semisolid process parameters. Besides, the elongation as-extruded of WE34-1Ni alloys increased from 21.4±0.7% to 33.2±0.3% at 4.10 kW power and 625°C via electro-magnetic induction heating semi-solid treatment.

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“…Precipitates contribute to strengthening the material are either globular or plate‐like shaped . Zn also forms Zn‐Zr second phases and, as a result, improves the ductility . After rolling in hot conditions, the material is typically heat treated to the T5 condition or T6 condition.…”

Section: Introductionmentioning

confidence: 99%

“…10,52,54 Zn also forms Zn-Zr second phases and, as a result, improves the ductility. 55 After rolling in hot conditions, the material is typically heat treated to the T5 condition or T6 condition. The T5 condition is a heat treatment at 205°C for 48 hours, while T6 consists of a 24-hour long solution treatment at 536°C first and then the same 48-hour long treatment at 205°C.…”

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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Microstructures and mechanical properties of the age hardened Mg–4.2Y–2.5Nd–1Gd–0.6Zr (WE43) microalloyed with Zn

Cited by 62 publications

References 19 publications

Mechanical and Corrosion Properties of Two Precipitation-Hardened Mg-Y-Nd-Gd-Dy Alloys with Small Changes in Chemical Composition

Mechanical and Corrosion Properties of Two Precipitation-Hardened Mg-Y-Nd-Gd-Dy Alloys with Small Changes in Chemical Composition

Effects of semi-solid treatment by electro-magnetic induction on micro-structure evolution and mechanical properties of the Mg-2.4Y-4Nd-0.5Zr-1Ni alloys

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

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