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Development of Grain Refining Mechanism of Al Alloys by AlTiB Master Alloys(PDF)

MATERIALS CHINA[ISSN:1674-3962/CN:61-1473/TG]

Issue:
2018年第8期
Page:
70-75
Research Field:
Publishing date:

Info

Title:
Development of Grain Refining Mechanism of Al Alloys by AlTiB Master Alloys
Author(s):
HAN Yanfeng12ZHANG Hanlong12XU Jun12ZHANG Jiao12SUN Baode123
1.School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming,Shanghai Jiao Tong University, Shanghai 200240, China
3. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
Keywords:
Al alloys solidification heterogeneous nucleation grain refinement liquid/solid interface
CLC:

PACS:
-
DOI:
10.7502/j.issn.1674-3962.2018.08.09
DocumentCode:

Abstract:
The hypotheses and development on the grain refinement of Al alloys by Al-Ti-B master alloys are reviewed. The contradictions and deputies among the present models are discussed. The heterogeneous nucleation of overgrowth phase on the substrate belongs to the liquidsolid phase transformation, and the structure of corresponding liquid/solid interfaces controls the process of heterogeneous nucleation. Atomicscale studies on the structural evolution at the liquid/solid interface during heterogeneous nucleation can provide a more precise description of the physical process of heterogeneous nucleation than that in solid view.

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Last Update: 2018-09-03