Solute Redistribution with Shear Flow in Molten Pool of Ni-Cr Alloy

J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (2): 183-188.

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Solute Redistribution with Shear Flow in Molten Pool of Ni-Cr Alloy

Zhibo Dong^1,2), Shujuan Wang²⁾, Rui Ma¹⁾, Yanhong Wei¹⁾, Kuijing Song²⁾, Guofu Zhai²⁾

1) The State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China
2) School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China

Received:2010-05-10 Revised:2010-08-23 Online:2011-02-28 Published:2011-02-28
Contact: Zhibo Dong
Supported by:
the National Natural Science Foundation of China (Grant No. 50775112), the China Postdoctoral Science Foundation (No. 20080430129) and the National Key Technology R&D Program (No. 2007BAE07B07)

Abstract

Abstract: Columnar grain growth with shear °ow in molten pool of Ni-Cr alloy was simulated with a coupled model of grain growth and solute transport. The results indicate that shear °ow alters solute distribution at the vicinity of columnar grains. The solute concentration gradient on the upstream side is greater, while that on the downstream side is smaller, leading to asymmetrical growth of columnar grains. In the interior of a columnar grain, solute concentration increases from the bottom to the dendrite tip, but the rate of increase tends to be reduced. The simulated results are consistent with the experiments.

Key words: Columnar grain growth, Fluid flow, Solute redistribution, Cellular automaton

Zhibo Dong, Shujuan Wang, Rui Ma, Yanhong Wei, Kuijing Song, Guofu Zhai. Solute Redistribution with Shear Flow in Molten Pool of Ni-Cr Alloy[J]. J Mater Sci Technol, 2011, 27(2): 183-188.

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Solute Redistribution with Shear Flow in Molten Pool of Ni-Cr Alloy

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