Microstructural Evolution Under Low Shear Rates During Rheo Processing of LM25 Alloy

被引：0
|
作者：
Sunitha Jallepalli Satya
Vivek Kumar
Nilam S. Barekar
Koushik Biswas
Brij K. Dhindaw
机构：
[1] Indian Institute of Technology,Metallurgical and Materials Engineering
[2] Kharagpur,Institute for Complex Materials
[3] Leibniz Institute for Solid State and Materials Research Dresden,School of Materials and Mineral Resources Engineering
[4] University Sains Malaysia,undefined
来源：
Journal of Materials Engineering and Performance | 2012年 / 21卷
关键词：
convection; microstructure; semi solid; shear stress;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Microstructural features of LM25 alloy processed by two different routes: (1) conventional casting, and (2) shear casting based on inclined heated surface are studied. The microstructures of the primary phase for the shear-cast samples show rosette or ellipsoidal morphologies. Heat transfer of contacting melt with the inclined tube surface and shear stress exerted on the layers of the melt as result of gravitational force are crucial parameters for the microstructural evolution. Compared to those produced by conventional casting, shear-cast samples have a much improved tensile strength and ductility due to globular microstructure.
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页码：2283 / 2289
页数：6
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