Paper Title:
Development of Processing Maps for DC Cast Modified and Unmodified Hypereutectic Al-Si Alloys
  Abstract

The hot deformation behavior of DC cast phosphorous modified and unmodified hypereutectic Al-Si alloys was studied in the temperature range of 400-500 °C and strain rate range of 0.001-1 s-1. Processing maps were developed to evaluate the efficiency of the hot deformation and to identify the instability region. The results show that the peak stresses of the unmodified alloy are higher than that of the modified alloy at the strain rate of 1 s-1 and temperatures of 400 and 440 °C. The maximum power dissipation efficiencies for both the alloys are in the region of T=480-500 °C and =0.01-0.1 s-1. The flow instabilities for both the alloys occur in regions of high strain rate about 1 s-1 and temperature about 400 and 500 °C. The instability region area of the unmodified alloy is larger than that of the modified alloy. In addition, the primary Si cracking frequencies of the unmodified alloy are higher than that of the modified alloy when compared at the same deformation rate and temperature. The coarser primary Si particles of the unmodified alloy cause higher stress concentration around them when deformed at low temperature and high strain rate.

  Info
Periodical
Edited by
Zhang Yushu
Pages
116-120
DOI
10.4028/www.scientific.net/AMR.213.116
Citation
K. Z. He, F. X. Yu, D. Z. Zhao, L. Zuo, "Development of Processing Maps for DC Cast Modified and Unmodified Hypereutectic Al-Si Alloys", Advanced Materials Research, Vol. 213, pp. 116-120, 2011
Online since
February 2011
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: Jacques Stolarz
Abstract:Low cycle fatigue of porosity free Al-Si alloys containing between 11 and 18 wt.% Si and produced through directed solidification has been...
231
Authors: De Hong Lu, Ming Zhou, Shao Sheng Wei, Ye Hua Jiang, Rong Zhou
Abstract:The effect of the temperature at the friction surface on spheroidization and refinement of Si particles in hypereutectic Al-30Si alloys was...
102
Authors: Ai Qin Wang, Jing Pei Xie, Wen Yan Wang, Luo Li Li
Chapter 1: Material Science
Abstract:In the present work, the Al-21Si-0.8Mg-1.5Cu-0.5Mn alloys composite modified by P+RE was prepared by metal mold casting. The tribological...
28
Authors: Ke Zhun He, Fu Xiao Yu, Da Zhi Zhao, Liang Zuo
Chapter 3: Materials Engineering
Abstract:The hot deformation behavior and microstructure evolution of a DC cast hypereutectic Al-Si alloy was studied in the temperature range of...
332
Authors: Bo Gao, Fei Jiang, Yi Hao, Gan Feng Tu, Lei Chen, Weixi Shi
Chapter 1: Non-Ferrous Metal Material
Abstract:The influence of Nd on structure and properties of hypereutectic Al-Si alloys (Al-17.5%Si, Al-25%Si) was investigated in this paper. For...
105