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

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.

scholarly journals Microstructure and Properties of Rapidly Solidified Cu–0.81Cr–0.12Zr Alloy

2013 ◽  
Vol 54 (8) ◽  
pp. 1403-1407 ◽  
Author(s):  
Zhenya Pan ◽  
Jiangbiao Chen ◽  
Wei Zhou ◽  
Jinfu Li
Keyword(s):  
Microstructure And Properties ◽  
Rapidly Solidified

Microstructure and Properties of Rapidly Solidified Al-Zn-Mg-Cu Alloy

2020 ◽  
Vol 993 ◽  
pp. 203-207
Author(s):  
Wei Min Ren ◽  
Zi Yong Chen ◽  
Zhi Lei Xiang ◽  
Li Hua Chai
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Cooling Rate ◽  
Rapid Solidification ◽  
Second Phase ◽  
Alloy Strip ◽  
Roller Speed ◽  
Microstructure And Properties ◽  
Cu Alloy ◽  
Rapidly Solidified

Refining grain plays an important role in improving the mechanical properties of aluminum alloys. However, the conventional casting method with a slow cooling rate can be easy to cause coarseness of the microstructure and serious segregation. In this paper, the rapid solidification of Al-Zn-Mg-Cu alloy was prepared by the single-roller belt method. The alloy strip was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and hardness test to study the microstructure and properties of the rapidly solidified aluminum alloy. The results show that the roller speed was an important parameters affecting the formability of the alloy. When the roller speed was 15 m/s, the aluminum alloy produced a thin bandwidth of 5 mm and a thickness of 150 um. As the rotation speed of the roller increased, the cooling rate of the melt increased, and the microstructure of the rapidly solidified Al-Zn-Mg-Cu aluminum alloy strip improved in grains refinement. Compared with the conventionally cast Al-Zn-Mg-Cu aluminum alloys, the Al-Zn-Mg-Cu aluminum alloys prepared by rapid solidification showed much finer crystal grains, and enhanced solid solubility of alloying elements with less precipitation of second phase and high hardness.

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

Microstructure and Properties of Rapidly Solidified Complex Titanium Alloys

1986 ◽  
Vol 80 ◽  
Author(s):  
P. R. Munroe ◽  
A. P. Woodfield ◽  
M. H. Loretto
Keyword(s):  
Titanium Alloys ◽  
Microstructure And Properties ◽  
Prolonged Aging ◽  
Rapidly Solidified

AbstractRapidly solidified titanium alloys containing carbon and erbium have been examined microstructurally in the as-quenched and aged conditions. Studies show that cubic erbia forms initially, but prolonged aging results in the formation of trigonal erbia. The formation of this phase is enhanced by the presence of carbon.

scholarly journals Microstructure and properties of rapidly solidified Mg-5%Ca-Al-Zn alloys

2005 ◽  
Vol 55 (3) ◽  
pp. 137-141 ◽  
Author(s):  
Yuichi ASANO ◽  
Junichi KANEKO ◽  
Makoto SUGAMATA ◽  
Masahiro KUBOTA
Keyword(s):  
Microstructure And Properties ◽  
Rapidly Solidified ◽  
Zn Alloys
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