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Metallurgical and Corrosion Studies of Modified T91 Grade steel

Published online by Cambridge University Press:  01 February 2011

Pankaj Kumar ,
Debajyoti Maitra  and
Ajit K Roy
Pankaj Kumar
Affiliation:
panku65@gmail.com, University of Nevada Las Vegas, Mechanical Engineering, 1173 Maryland Circle Apt#3, Las Vegas, NV, 89119, United States, 702-332-7022
Debajyoti Maitra
Affiliation:
maitrad@gmail.com, University of Nevada Las Vegas, Mechanical Engineering, 1173 Maryland Circle Apt#3, Las Vegas, NV, 89119, United States
Ajit K Roy
Affiliation:
aroy@unlv.nevada.edu, University of Nevada Las Vegas, Mechanical Engineering, 4505 Maryland Parkway, Mechanical engineering department, University of Nevada Las vegas, Las Vegas, NV, 89154, United States
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Abstract

Modified 9Cr-1Mo steels containing different Silicon (Si) content have been tested for evaluation of their metallurgical and corrosion properties. The results of tensile testing indicated reduced failure strain up to 400°C followed by its enhancement at a higher temperature. Stress corrosion cracking tests at constant load did not show any failure in any materials. However, reduced ductility and true failure stress were noted in slow strain rate (SSR) testing, indicating increased cracking susceptibility at elevated temperatures. The corrosion potential became more active with increasing temperature in polarization studies. A combination of intergranular and cleavage failures was observed in specimens tested by the SSR technique.

Keywords

corrosiontransmission electron microscopy (TEM)scanning electron microscopy (SEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 929: Symposium II – Materials in Extreme Environments , 2006 , 0929-II05-02
Copyright
Copyright © Materials Research Society 2006

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References

[1] ASTM Designation E 8, “Standard test methods for tensile testing of metallic materials”Google Scholar
[2] ASTM Designation G 5, “Standard Test Methods for Tensile Testing of Metallic Materials”.Google Scholar
[3] Kishore, R., Singh, R.N and Kashyap, B.P, Journal of Materials Science 32 (1997) pp. 437–442 Google Scholar