scholarly journals Numerical simulation of microstructure evolution during directional solidification of Ti-45at.%Al alloy

2008 ◽  
Vol 57 (5) ◽  
pp. 3048
Author(s):  
Wang Kuang-Fei ◽  
Guo Jing-Jie ◽  
Mi Guo-Fa ◽  
Li Bang-Sheng ◽  
Fu Heng-Zhi
Keyword(s):  
Numerical Simulation ◽  
Directional Solidification ◽  
Microstructure Evolution ◽  
Al Alloy

scholarly journals Modelling of Microstructure Evolution during Laser Processing of Intermetallic Containing Ni-Al Alloys

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1051
Author(s):  
Mohammad Amin Jabbareh ◽  
Hamid Assadi
Keyword(s):  
Additive Manufacturing ◽  
Rapid Solidification ◽  
Microstructure Evolution ◽  
Phase Field ◽  
Laser Processing ◽  
Field Model ◽  
Phase Field Model ◽  
Intermetallic Phases ◽  
Al Alloy ◽  
Kinetic Effects

There is a growing interest in laser melting processes, e.g., for metal additive manufacturing. Modelling and numerical simulation can help to understand and control microstructure evolution in these processes. However, standard methods of microstructure simulation are generally not suited to model the kinetic effects associated with rapid solidification in laser processing, especially for material systems that contain intermetallic phases. In this paper, we present and employ a tailored phase-field model to demonstrate unique features of microstructure evolution in such systems. Initially, the problem of anomalous partitioning during rapid solidification of intermetallics is revisited using the tailored phase-field model, and the model predictions are assessed against the existing experimental data for the B2 phase in the Ni-Al binary system. The model is subsequently combined with a Potts model of grain growth to simulate laser processing of polycrystalline alloys containing intermetallic phases. Examples of simulations are presented for laser processing of a nickel-rich Ni-Al alloy, to demonstrate the application of the method in studying the effect of processing conditions on various microstructural features, such as distribution of intermetallic phases in the melt pool and the heat-affected zone. The computational framework used in this study is envisaged to provide additional insight into the evolution of microstructure in laser processing of industrially relevant materials, e.g., in laser welding or additive manufacturing of Ni-based superalloys.

Microstructure evolution of peritectic Nd14Fe79B7 alloy during directional solidification

2008 ◽  
Vol 310 (14) ◽  
pp. 3366-3371 ◽  
Author(s):  
Hong Zhong ◽  
Shuangming Li ◽  
Haiyan Lü ◽  
Lin Liu ◽  
Guangrong Zou ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Microstructure Evolution

Spark Plasma Sintering of Cryomilled Nanocrystalline Al Alloy - Part I: Microstructure Evolution

2011 ◽  
Vol 43 (1) ◽  
pp. 327-339 ◽  
Author(s):  
Yuhong Xiong ◽  
Dongming Liu ◽  
Ying Li ◽  
Baolong Zheng ◽  
Chris Haines ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Microstructure Evolution ◽  
Al Alloy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Alloy Part

Study of Microstructure Evolution during Semi-Solid Processing of an In-Situ Al Alloy Composite

2015 ◽  
Vol 30 (3) ◽  
pp. 356-366 ◽  
Author(s):  
Santosh Kumar ◽  
Prosenjit Das ◽  
Sandeep K. Tiwari ◽  
Manas K. Mondal ◽  
Supriya Bera ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Al Alloy ◽  
Alloy Composite ◽  
Semi Solid

Research on Temperature Change and Microstructure Evolution of Bore in Steel Target Penetrated by Copper Jets

2010 ◽  
Vol 667-669 ◽  
pp. 641-646
Author(s):  
Hao Chen ◽  
Gang Tao
Keyword(s):  
Numerical Simulation ◽  
Grain Size ◽  
Dynamic Recrystallization ◽  
Temperature Change ◽  
Microstructure Evolution ◽  
Channel Wall ◽  
Cooling Time ◽  
Steel Target

Copper fragments are found to adhere on penetration channel wall after copper jets penetrate steel target, and the research on it is helpful to know microstructure evolution of jets in the process of penetration and cooling time. This paper is based on the observation of bore in steel target penetrated by copper jets, and uses numerical simulation to study the process of copper jets penetration, then the change of temperature and grain size of jets adhered on penetration channel wall can be gotten, and the results agree with the observation of penetration channel wall taken by SEM. From the observations of copper and steel, we can get the conclusion that copper jets are not melted but have dynamic recrystallization in the process of penetration, then copper grain size increases obviously in cooling time, and twins are formed at the same time.

Numerical Simulation on the Suppression of Crucible Wall Constraint in Directional Solidification Furnace

Silicon ◽  
2018 ◽  
Vol 11 (2) ◽  
pp. 775-780 ◽  
Author(s):  
S. Sanmugavel ◽  
M. Srinivasan ◽  
K. Aravinth ◽  
P. Ramasamy
Keyword(s):  
Numerical Simulation ◽  
Directional Solidification ◽  
Crucible Wall ◽  
Solidification Furnace
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