Development of a new magnesium alloy ZW21

Chen, T.J.; Wang, W.; Zhang, D.H.; Ma, Ying; Yuan, Hao

doi:10.1016/j.matdes.2012.08.040

Cited by 18 publications

(16 citation statements)

References 33 publications

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“…The mechanical properties reach their highest values, a UTS of 238 MPa, an elongation of 19.4%, and a hardness of 58 HV, when the time is 70 min. These values are higher than those of the permanent mold-cast ZW21 alloy, 9) which means that the ZW21 alloy is suitable for thixoforming. Comparing Figs.…”

Section: Effect On Mechanical Propertiesmentioning

confidence: 81%

“…7,8) The authors have developed a new Mg-Zn-Y alloy named ZW21, and the as-cast ZW21 alloy has an ultimate tensile strength of 205 MPa, an elongation of 18.25%, and a hardness of 50 HV. 9) After being properly heat treated, these three mechanical properties can be improved to 243 MPa, 23.75%, and 68.7 HV, respectively. 10) Further, the content of high-cost rare earth elements is only 1.5%, and the content of large-density elemental Zn is about 2%.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Reheating Temperature and Time on the Microstructure and Mechanical Properties of Thixoforged ZW21 Alloy

Chen

Guo

et al. 2015

Mater. Trans.

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The effects of reheating temperature and time on the microstructure and mechanical properties of thixoforged ZW21 alloy were investigated. The results indicate that the ZW21 alloy is suitable for thixoforming in view of its thixoformability and the resulting mechanical properties. The reheating temperature and duration mainly affect the microstructure, including the size and fraction of primary particles, the microstructure compactness, the solubilities of the solute elements and W phase content, and thus the mechanical properties of the thixoforged alloy. The effects of the reheating temperature are larger than that of the reheating time. These two parameters have an optimum critical value, and values less than or higher than this value decrease the mechanical properties. The appropriate reheating technique is heating for 70 min at 913 K, and the resulting ultimate tensile strength, elongation, and hardness can be up to 238 MPa, 19.4%, and 58 HV, respectively. As the reheating temperature or reheating time increases, the fracture regime has a tendency to change from intergranular mode to transgranular mode and finally to intergranular mode again.

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Section: Effect On Mechanical Propertiesmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Effects of Reheating Temperature and Time on the Microstructure and Mechanical Properties of Thixoforged ZW21 Alloy

Chen

Guo

et al. 2015

Mater. Trans.

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“…As mentioned in the section of Introduction, the formation of the ternary phases depends on the Zn/Y ratio. 2,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Summarizing the existing investigations, the following rules can be concluded: Zn/Y < 0.6, only one ternary phase of Z can form; 0.6 < Zn/Y < 0.85, two phases of Z and W will form; 0.85 < Zn/Y < 2.05, only W phase can form. For the present work, the Zn/RE ratios of the alloys with 0%, 0.3%, 0.5%, 1%, 2% and 3% Nd are 2, 1.54, 1.33, 1, 0.67 and 0.5 respectively.…”

Section: Effect Of Nd Content On Microstructurementioning

confidence: 99%

“…So it should have large application potential in many civil elds besides aerospace. But our previous investigation only presented the optimum compositions through orthogonal experiment method and the effects of heat treatment on microstructure and mechanical properties, 5,6) the reasons why the alloy with such a composition exhibits high mechanical properties were not involved. The alloy has a nominal composition of Mg-2Zn-1Y-0.5Nd-0.5Sn-0.3Zr-0.05Ca.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Nd or Zr Addition on Microstructure and Mechanical Properties of As-Cast Mg-Zn-Y Alloy

et al. 2016

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The effects of Nd or Zr addition on microstructure and mechanical properties of casting Mg-Zn-RE alloy have been investigated. The results indicate that the optimum contents of Nd and Zr are 0.5% and 0.3% respectively. The less or higher contents all increase grain size and accelerate the formation of shrinkage porosity, and thus decrease tensile properties and change fracture regime from transgranular mode to intergranular mode during tensile tests. The Mg-Zn-RE ternary phases transform from W (Mg 3 Zn 3 (Nd,Y) 2 ) in turn into W + Z (Mg 12 Zn(Nd,Y)) and Z as the Nd content increases and their distribution gradually changes from small discontinuous lath form to continuous network form. The grain bonding strength of an alloy with a certain amount of W phase that distributes in a discontinuous form is high than that of the alloy with the Z phase, and thus the W phase is an ideal strengthening phase. The alloy with 0.5 Nd and 0.3% Zr, named ZW21 alloy, has the smallest grains and highest grain bonding strength, and so has the highest comprehensive mechanical properties.

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Organic–inorganic hybrid sol–gel coatings for metal corrosion protection: a review of recent progress

2014

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This paper is a review of the most recent and relevant achievements (from 2001 to 2013) on the development of organic-inorganic hybrid (OIH) coatings produced by sol-gel-derived methods to improve resistance to oxidation/corrosion of different metallic substrates and their alloys. This review is focused on the research of OIH coatings based on siloxanes using the sol-gel process conducted at an academic level and aims to summarize the materials developed and identify perspectives for further research. The fundamentals of sol-gel are described, including OIH classification, the interaction with the substrate, their advantages, and limitations. The main precursors used in the synthesis of OIH sol-gel coatings for corrosion protection are also discussed, according to the metallic substrate used. Finally, a multilayer system to improve the resistance to corrosion is proposed, based on OIH coatings produced by the sol-gel process, and the future research challenges are debated.

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Development of a new magnesium alloy ZW21

Cited by 18 publications

References 33 publications

Effects of Reheating Temperature and Time on the Microstructure and Mechanical Properties of Thixoforged ZW21 Alloy

Effects of Reheating Temperature and Time on the Microstructure and Mechanical Properties of Thixoforged ZW21 Alloy

Effects of Nd or Zr Addition on Microstructure and Mechanical Properties of As-Cast Mg-Zn-Y Alloy

Organic–inorganic hybrid sol–gel coatings for metal corrosion protection: a review of recent progress

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