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Effects of Nitrogen Ion Implantation in 304 Stainless Steel at High Temperatures

Published online by Cambridge University Press:  25 February 2011

Sadhna Shrivastava ,
Ram D. Tarey ,
M.C. Bhatnager ,
Amttaeh Jain  and
K.L. Chopra
Sadhna Shrivastava
Affiliation:
Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
Ram D. Tarey
Affiliation:
Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
M.C. Bhatnager
Affiliation:
Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
Amttaeh Jain
Affiliation:
Current address: 13 4050, Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
K.L. Chopra
Affiliation:
Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
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Abstract

We studied the effect of varying the target temperature (by changing the beam power) on the structure and properties of nitrogen ion implanted 304 stainless steel. With a beam power of 0.1 W/ cm2 the target temperature is restricted to 150°C. After a dose of 3. 5x1017N2+/cm2 the microhardness measured at 10g increases by 15%. With a beam power of 1.1 W/cm2 the target temperature is 500°C. After the same dose as before, the irdcrohardness increase is 40%. Glancing Angle X-ray Diffraction and Auger depth profiling results suggest that the increased hardness is due to the presence of nitrogen in solution as opposed to complete precipitation. A sample deformed by compression formed an enhanced oxide layer during implantation. This oxide layer appears to have a capping action against the out-diffusion of nitrogen.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 157: Symposium A – Beam-Solid Interactions: Physical Phenomena , 1989 , 843
Copyright
Copyright © Materials Research Society 1990

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References

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