Precipitation Hardening of Mg-Zn and Mg-Zn-RE alloys

Wei, Liu-Ying; Dunlop, G. L.; Westengen, Håkon

doi:10.1007/bf02670757

Cited by 231 publications

(102 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[52][53][54][55][56] The aging curves of two binary Mg-Zn alloys are provided in Figure 5(a). Depending on the alloy composition and aging temperatures, it is commonly accepted in the literature [6,8,30] that the decomposition of the supersaturated solid-solution matrix phase reportedly involves the formation of G.P.…”

Section: Phase Equilibria and Precipitationmentioning

confidence: 99%

“…The metastable phase b 0 1 , which is also described as MgZn¢, [52,59] forms as 0001 ½ a rods, whereas the metastable phase b phases were suggested to have a hexagonal structure (a = 0.520 nm, c = 0.857 nm) [56,[60][61][62][63] that is identical to that of MgZn 2 (space group P6 3 /mmc, a = 0.5221 nm, c = 0.8567 nm). [64] Another hexagonal structure (a = 0.556 nm, c = 0.521 nm) was also reported for b 0 1 , [59] but it has not been confirmed so far.…”

Section: Phase Equilibria and Precipitationmentioning

confidence: 99%

“…1 and a-Mg, [60][61][62] and a-Mg. [56,60] A recent electron microscopy study of precipitate phases in a Mg-8 wt pct Zn alloy aged at 473 K (200°C) [65] indicates that the precipitate structures and orientation relationships are more complicated than those reported in early studies. the eutectoid reaction within primary particles of the Mg 7 Zn 3 phase.…”

Section: Phase Equilibria and Precipitationmentioning

confidence: 99%

“…Some other studies indicate that macroadditions of RE elements [56,88] and microalloying additions of Sn and In [89] to Mg-Zn alloys have little effect on the agehardening response. A commercial magnesium alloy developed from the Mg-Zn-RE system is ZE41, Mg-4.2 wt pct Zn-1.3 wt pct RE-0.7 wt pct Zr (where RE represents rare-earth misch-metal).…”

Section: Phase Equilibria and Precipitationmentioning

confidence: 99%

See 3 more Smart Citations

Precipitation and Hardening in Magnesium Alloys

Nie

2012

Metall Mater Trans A

1,394

519

View full text Add to dashboard Cite

Magnesium alloys have received an increasing interest in the past 12 years for potential applications in the automotive, aircraft, aerospace, and electronic industries. Many of these alloys are strong because of solid-state precipitates that are produced by an age-hardening process. Although some strength improvements of existing magnesium alloys have been made and some novel alloys with improved strength have been developed, the strength level that has been achieved so far is still substantially lower than that obtained in counterpart aluminum alloys. Further improvements in the alloy strength require a better understanding of the structure, morphology, orientation of precipitates, effects of precipitate morphology, and orientation on the strengthening and microstructural factors that are important in controlling the nucleation and growth of these precipitates. In this review, precipitation in most precipitation-hardenable magnesium alloys is reviewed, and its relationship with strengthening is examined. It is demonstrated that the precipitation phenomena in these alloys, especially in the very early stage of the precipitation process, are still far from being well understood, and many fundamental issues remain unsolved even after some extensive and concerted efforts made in the past 12 years. The challenges associated with precipitation hardening and age hardening are identified and discussed, and guidelines are outlined for the rational design and development of higher strength, and ultimately ultrahigh strength, magnesium alloys via precipitation hardening.

show abstract

Section: Phase Equilibria and Precipitationmentioning

confidence: 99%

Section: Phase Equilibria and Precipitationmentioning

confidence: 99%

Section: Phase Equilibria and Precipitationmentioning

confidence: 99%

Section: Phase Equilibria and Precipitationmentioning

confidence: 99%

See 2 more Smart Citations

Precipitation and Hardening in Magnesium Alloys

Nie

2012

Metall Mater Trans A

1,394

519

View full text Add to dashboard Cite

show abstract

“…As a kind of common alloying ingredient, zinc(Zn) is often added for helping improve the mechanical properties and overcome the harmful corrosive effects by means of solid solution strengthening and age hardening [16][17][18][19]. Also, zinc is one of themost abundant nutritionally essential elements in the human body and released Zn ions can be easily absorbed [20,21].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical properties, corrosion behavior and hemolysis of as-extruded biodegradable Mg-Sn-Zn alloy

Hou

Zhong

Pan

et al. 2016

AIP Conference Proceedings

View full text Add to dashboard Cite

Synthesis of biodegradable Mg-Zn alloy using mechanical alloying: Effect of ball to powder weight ratio AIP Conference Proceedings 1756, 020001 (2016) and mechanical properties, as well as good biocompatibility, and are expected to totally biodegrade in the body environment. The microstructure mechanical properties, corrosion behaviors and hemolysis of biodegradable Mg-Sn-Zn alloy were investigated under three extrusion ratios in the present work. It is revealed that the as-extruded microstructure is obviously refined with smaller grains compared with the as-cast structure while some twins form simultaneously. The tensile strengths of the as-extruded alloys fabricated with the higher extrusion ratio is 249MPa, and elongations is 16.3% respectively. Besides, the corrosion rate of as-extruded magnesium alloys increases with the increasing extrusion ratio. The hemolysis test result shows that the hemolysis rate of biodegradable magnesium alloys fabricated with the higher extrusion ratio is 4.8%, when hemolysis rate lower than 5% has been demonstrated safe according to ISO 10993-4. In conclusion, the as-extruded biodegradable Mg-Sn-Zn alloy shows great potential as a novel medical implant material.

show abstract