Paper Title:
Kinetics of Coarsening and Solid Sphericity during Reheating of Ductile Iron and Al Alloys
  Abstract

Reheating process in the semi-solid state is a very important step in the thixoforming process. In this research semi-solid ductile cast iron and Al alloys (Al-2.5Si, Al356) prepared by inclined plate method, were reheated to examine the effect of reheating conditions on the microstructure and coarsening kinetics of the alloys. For ductile cast iron, solid fraction at different reheating temperatures and holding times was obtained and based on these results the optimum reheating temperature range was determined. In the case of Al alloys increase of holding time in the semi-solid state, leads to increase of liquid fraction, solid grain size and improvement of sphericity of solid particles. In addition, the results show that coarsening kinetics of microstructures of both alloys during reheating was diffusion controlled and can be mostly treated by Ostwald ripening theory.

  Info
Periodical
Solid State Phenomena (Volumes 116-117)
Edited by
C.G. Kang, S.K. Kim and S.Y. Lee
Pages
205-208
DOI
10.4028/www.scientific.net/SSP.116-117.205
Citation
P. Babaghorbani, S. Salarfar, M. Nili-Ahmadabadi, "Kinetics of Coarsening and Solid Sphericity during Reheating of Ductile Iron and Al Alloys", Solid State Phenomena, Vols. 116-117, pp. 205-208, 2006
Online since
October 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jeong Min Kim, Ki Duk Seong, Joong Hwan Jun, Ki Tae Kim, Woon Jae Jung
Abstract:Semi-Solid Al-5%Mg-3%Zn-1%Mn alloys with or without 0.2%Zr were prepared by the isothermal heating of either cast ingot or extruded billet....
284
Authors: Xing Chao Wu, Yong Sheng Li, Zhi Yuan Hou, Wei Liu, Hao Jie Mei
Symposium P: Superalloys
Abstract:A quantitative phase field simulation was performed on the dynamics evolution of γ′ (L12-Ni3X) phase in Ni-based...
655
Authors: Shui Qing Xiao, Shang Hua Wu
Chapter 2: Nano and Inorganic Functional Materials
Abstract:Mechanical properties of ceramic materials are closely related to the grain size, and control the ceramic material grain size is the key to...
374
Authors: Jin Long Fu, Yu Wei Wang, Kai Kun Wang, Xiao Wei Li
Chapter 4: Development of Materials Processing Technologies
Abstract:To investigate the influence of refined grains on the microstructure of 7075 aluminum alloy in semi-solid state, a new strain induced melting...
294