Formation process of unique microstructure in rapidly solidified Mg97Zn1Y2 alloy

Nishida, Minoru; Kawamura, Yoshihito; Yamamuro, Takateru

doi:10.1016/j.msea.2003.10.145

Cited by 68 publications

(40 citation statements)

References 5 publications

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“…Based on abovementioned differential thermal analysis, and on reported Vickers hardness change of the ribbon which was attained by the induction melting the mixture of pure metals, 9) ageing treatments schemed of the ribbon were conducted. The Vickers micro-hardness was presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The number of options is the product of number of phases and varieties of defects and possibility of discontinuous or continuous mode. By combination with XRD analysis and TEM observation, no cells on the boundaries of arrays developed in the reported, 9) possibly because the process of melting the pure metals including the low melt point of Zn increased its lose.…”

Section: Morphologies Of the As-spun Alloymentioning

confidence: 94%

“…3,4) A. Inoue et al fabricated an high strength Mg-based Mg 97 Zn 1 Y 2 alloy with a novel LPS structure by rapid solidification (RS) techniques such as powder metallurgy and melt-spinning, [5][6][7] and later the variation and formation process of LPS structures were reported. [8][9][10] Now Mg alloys with LPS structures already become an important crystal alloy series besides ones with quasicrystallines in study. Whereas, the morphologies of Mg 97 Zn 1 Y 2 alloy as spun and aged, which were only reported for the research of LPS structures, 11,12) as a basic study, have not been reported systemically had as conventional alloys been.…”

Section: Introductionmentioning

confidence: 99%

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Morphologies of Microstructure in Mg97Zn1Y2 Ribbon upon Ageing at Different Temperatures

et al. 2008

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In order to clarify the morphology of the rapidly-solidified (RS)/melt-spun Mg 97 Zn 1 Y 2 (at%) alloy, which has the secondary phases of long-period stacking (LPS) structure, the ribbon was processed with the thickness of 60 mm and the width of 7 mm, and aged (T5 heat-treated) at different temperatures. The as-spun and aged ribbons were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD) and laser optical microscopy, and micro-hardness measurement were conducted. It is found that there was a cellular/dendritic transition during melt-spinning process of Mg 97 Zn 1 Y 2 alloy, and a mild age strengthening with the hardness of 113HV/0.05 at 573 K; more importantly, there was a different evolution of morphologies of the matrix and inter-metallic compounds from general secondary phase strengthened alloys when age temperatures up to the 773 K had been introduced to the as-spun alloy.

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Section: Resultsmentioning

confidence: 99%

Section: Morphologies Of the As-spun Alloymentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Morphologies of Microstructure in Mg97Zn1Y2 Ribbon upon Ageing at Different Temperatures

et al. 2008

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“…Gravity segregation has a detrimental impact on the subsequent processing behavior and properties of cast materials. Therefore, methods for the control of gravity segregation had been constantly pursued, such as solidification under microgravity, 1) rapid solidification, 2) addition of alloying elements, 3) diffusion annealing 4) and electromagnetic fields, 5,6) etc. However, all these methods have some weaknesses or deficiencies because they are relatively complicated or inefficient.…”

Section: Introductionmentioning

confidence: 99%

Effects of Uniform and Gradient High Magnetic Fields on Gravity Segregation in Aluminum Alloys

et al. 2009

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“…These excellent properties are considered to be due to the hcp(2H)-Mg fine grain matrix of 100 to 200 nm in diameter with a long period stacking order (LPSO) phase. The morphological, crystallographic and chemical characterizations of the LPSO phase have been performed by conventional transmission electron microscopy (CTEM), 2) a high-angle annular darkfield scanning-TEM with Z-contrast 3) and a three-dimensional atom probe. 4) We have reported 5) the unique interaction between the LPSO phase and the deformation twin in RS Mg 97 Zn 1 Y 2 alloy.…”

Section: Introductionmentioning

confidence: 99%

Dislocation Structure in Rapidly Solidified Mg97Zn1Y2 Alloy with Long Period Stacking Order Phase

2005

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Dislocation structure in rapidly solidified Mg 97 Zn 1 Y 2 ribbon with the long period stacking order (LPSO) phase is investigated by conventional transmission electron microscopy. In the grain with the LPSO phase there are no a dislocations lying on the basal plane, and a number of c þ a dislocations are visible. On the other hand, in the grain without the LPSO phase there are many straight a dislocations lying on the basal plane. These facts indicate that the critical resolved shear stress of the basal plane increases by the formation of the LPSO phase and the non-basal slip is activated by the prevention of the basal slip. In other words, the former directly contributes to the strengthening and the latter relates to the improvement of ductility with the increment of the number of the slip system. Therefore, it is concluded that the LPSO phase plays a unique role which overcomes the conflicting properties of strength and ductility in the mechanical property of the present alloy.

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Formation process of unique microstructure in rapidly solidified Mg97Zn1Y2 alloy

Cited by 68 publications

References 5 publications

Morphologies of Microstructure in Mg<SUB>97</SUB>Zn<SUB>1</SUB>Y<SUB>2</SUB> Ribbon upon Ageing at Different Temperatures

Morphologies of Microstructure in Mg<SUB>97</SUB>Zn<SUB>1</SUB>Y<SUB>2</SUB> Ribbon upon Ageing at Different Temperatures

Effects of Uniform and Gradient High Magnetic Fields on Gravity Segregation in Aluminum Alloys

Dislocation Structure in Rapidly Solidified Mg<SUB>97</SUB>Zn<SUB>1</SUB>Y<SUB>2</SUB> Alloy with Long Period Stacking Order Phase

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