Microstructures and phase selection in rapidly solidified Zn-Mg alloys

1996 ◽  
Vol 31 (2) ◽  
pp. 545-550 ◽  
Author(s):  
M. V. Akdepniz ◽  
J. V. Wood
Keyword(s):  
Mg Alloys ◽  
Phase Selection ◽  
Rapidly Solidified

Phase Selection in Sub-Rapidly Solidified Au-20Sn Alloys

2015 ◽  
Vol 817 ◽  
pp. 325-330
Author(s):  
Yu Hai Qu ◽  
Kai Jin Yang ◽  
Yan Tian Zhou ◽  
Yong Mao ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Cooling Rate ◽  
Nucleation Theory ◽  
Classical Nucleation Theory ◽  
Copper Mold ◽  
Cooling Rates ◽  
Phase Selection ◽  
Graphite Mold ◽  
Injection Casting ◽  
Rapidly Solidified ◽  
Ausn Phase

The sub-rapidly solidified Au-20Sn eutectic alloys were prepared by four different solidification pathways, such as, graphite mold conventional casting, graphite mold injection casting, copper mold injection casting, and water-cooled copper mold suction casting. The precipitating sequences of competing primary phases of sub-rapidly solidified Au-20Sn alloys with four different cooling rates were investigated. The results show that phase selection process is related to the cooling rates during sub-rapid solidification process. The primary ζ'-Au5Sn phase with developed dendrites precipitate at low cooling rate (2.4×10−4.2×102K/min) and the morphologies of the primary ζ'-Au5Sn change to rosette-like at higher cooling rate (9.0×103K/min). While the cooling rate reaches to 3.5×104K/min, the primary ζ'-Au5Sn phase can be suppressed but δ-AuSn phase will precipitate prior to the ζ'-Au5Sn phase. On the basis of the classical nucleation theory and transient nucleation theory, the process of competitive nucleation between the ζ'-Au5Sn phase and the δ-AuSn phase were analyzed for sub-rapid solidified Au-20Sn alloy. The theoretical calculations are consistent with the experimental investigations.

The Influence of Compositional Changes on the Glass-Forming Ability of Y-Containing Mg Alloys

2014 ◽  
Vol 1649 ◽  
Author(s):  
E. Eshed ◽  
M. Bamberger ◽  
A. Katsman
Keyword(s):  
Liquid Alloy ◽  
Supercooled Liquid ◽  
Glass Forming Ability ◽  
Mg Alloys ◽  
Qualitative And Quantitative ◽  
Glass Forming ◽  
Model Based ◽  
Compositional Changes ◽  
Rapidly Solidified ◽  
Quantitative Explanation

ABSTRACTThe effect of compositional changes on the glass forming ability of Mg alloys containing Y was studied. Four rapidly-solidified Mg-alloys were investigated: Mg91Y7.5La1.5, Mg85Y12La3, Mg86Y9.5Cu2.5La2 and Mg82Y11La4Eu3. XRD and DSC spectra revealed that the Mg86Y9.5Cu2.5La2 was the most amorphous out of the investigated alloys. A model based on a spinodal-like decomposition of a supercooled liquid alloy was developed. The model provides qualitative and quantitative explanation for the variation in glass forming ability.

scholarly journals Microstructural Aspects of Rapidly Solidified Al–Mg Alloys

1987 ◽  
Vol 28 (11) ◽  
pp. 934-944 ◽  
Author(s):  
Kojiro F. Kobayashi ◽  
Tomoyuki Awazu ◽  
Paul H. Shingu
Keyword(s):  
Mg Alloys ◽  
Rapidly Solidified

Intermetallic Phase Selection during Solidification of Al-Fe-Si(-Mg) Alloys

2002 ◽  
Vol 396-402 ◽  
pp. 107-112 ◽  
Author(s):  
M.W. Meredith ◽  
John Worth ◽  
Richard Hamerton
Keyword(s):  
Intermetallic Phase ◽  
Mg Alloys ◽  
Phase Selection

Mechanical and Structural Characterization of Rapidly Solidified Al-Fe-Mg Alloys

2015 ◽  
Vol 231 ◽  
pp. 11-18
Author(s):  
Anna Kula ◽  
Ludwik Blaz ◽  
Piotr Kusper ◽  
Makoto Sugamata
Keyword(s):  
Mechanical Properties ◽  
Intermetallic Compound ◽  
Rapid Solidification ◽  
Structural Characterization ◽  
Hot Extrusion ◽  
Mg Alloys ◽  
Microstructure Refinement ◽  
Series Of Experiments ◽  
Rapidly Solidified

Series of experiments on a series of Al-Fe-Mg alloys were performed to determine the effect of rapid solidification (RS) on the material strengthening, which result from the refining of thegrain size and intermetallic compound. Additionally, an enhancement of the material strengthening due to magnesium addition was also observed. Manufacture of RS Al-Fe-Mg alloys combined a spraydeposition of the molten alloy on the rotating water-cooled copper roll and plastic consolidation bymeans of powders pressing and hot extrusion methods. The results suggest that the rapid solidification provides an effective method of microstructure refinement and, in combination with solid solutionhardening due to Mg, leads to significant improvement of mechanical properties of Al-Fe-Mg based alloys.

Phase selection, microstructure and properties of laser rapidly solidified FeCoNiCrAl2Si coating

2011 ◽  
Vol 19 (8) ◽  
pp. 1130-1135 ◽  
Author(s):  
Hui Zhang ◽  
Yi-Zhu He ◽  
Ye Pan ◽  
Li-Zhai Pei
Keyword(s):  
Phase Selection ◽  
Microstructure And Properties ◽  
Rapidly Solidified
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