Journal of Materials Engineering and Performance, ( ISI ), Volume (25), No (4), Year (2016-4) , Pages (1269-1275)

Title : ( Hot deformation processing map and microstructural evaluation of the Ni-based superalloy IN-738LC )

Authors: Seyed Abdolkarim Sajjadi , Ardalan Chaichi , Hamid Reza Ezatpour , aria maghsoudlou , mohammad amin kalaei ,

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Hot deformation behavior of the Ni-based supralloy IN-738LC was investigated by means of hot compression tests over the temperature range of 1000-1200 °C and strain rate range of 0.01-1 s-1. The obtained peak flow stresses were related to strain rate and temperature through the hyperbolic - sine equation with activation energy of 950 kJ/mol. Dynamic material model was used to obtain the processing map of IN-738LC. Analysis of the microstructure was carried out in order to study each domain’s characteristic represented by the processing map. The results showed that dynamic recrystallization occurs in the temperature range of 1150-1200 °C and strain rate of 0.1 s-1 with the maximum power dissipation efficiency of 35%. The unstable domain was exhibited in the temperature range of 1000-1200 °C and strain rate of 1 s-1 on the occurrence of severe deformation bands and grain boundary cracking.

Keywords

, Keywords: IN, 738LC superalloy; Hot deformation; Constitutive equation; Processing
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@article{paperid:1055004,
author = {Sajjadi, Seyed Abdolkarim and Chaichi, Ardalan and Hamid Reza Ezatpour and Maghsoudlou, Aria and Kalaei, Mohammad Amin},
title = {Hot deformation processing map and microstructural evaluation of the Ni-based superalloy IN-738LC},
journal = {Journal of Materials Engineering and Performance},
year = {2016},
volume = {25},
number = {4},
month = {April},
issn = {1059-9495},
pages = {1269--1275},
numpages = {6},
keywords = {Keywords: IN-738LC superalloy; Hot deformation; Constitutive equation; Processing map.},
}

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%0 Journal Article
%T Hot deformation processing map and microstructural evaluation of the Ni-based superalloy IN-738LC
%A Sajjadi, Seyed Abdolkarim
%A Chaichi, Ardalan
%A Hamid Reza Ezatpour
%A Maghsoudlou, Aria
%A Kalaei, Mohammad Amin
%J Journal of Materials Engineering and Performance
%@ 1059-9495
%D 2016

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