Paper Title:
Manufacturing and Analysis of Mechanical Properties of Superalloy 718 in Hydraulic Forging
  Abstract

Alloy 718 ingot with a diameter of 400mm was made by the vacuum melting process ; VIM followed by VAR. Compression tests were conducted on samples collected from columnar zone of the VIM/VAR-processed Alloy 718 ingot in wide temperature and strain rate ranges, i.e. 750~1,200OC and 10~0.001s-1 in order to understand the deformation behavior and evolution of microstructure. Tensile tests at high temperature were also conducted on samples in temperature ranges, i.e. 750~1,100OC. Effects of process parameters on the flow behavior as well as on the microstructure evolution during compression tests at high temperatures are considered. As a result of the deformation simulation, The VIM/VAR ingot was heat-treated for homogenization, and casting structure of the ingot was broken down for uniform microstructures and mechanical properties by controlled cogging process using a hydraulic press. The observation of the microstructure and grain size distribution was carried out to evaluate the effects of optimum process parameters during cogging and mechanical property tests were performed in this study.

  Info
Periodical
Materials Science Forum (Volumes 539-543)
Main Theme
Edited by
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
Pages
3124-3129
DOI
10.4028/www.scientific.net/MSF.539-543.3124
Citation
Y. S. Song, M.R. Lee, J. T. Kim, "Manufacturing and Analysis of Mechanical Properties of Superalloy 718 in Hydraulic Forging", Materials Science Forum, Vols. 539-543, pp. 3124-3129, 2007
Online since
March 2007
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