• Asha Kumari
• Pradeep Kumar
• Alok Bihari Singh

: The utility and applicability of medium carbon steel for engineering applications is very precisely and widely popular these days. There are so many engineering applications of this material including shaft manufacturing in different fields of industries. It was also observed that the reason behind approximately 90 percent of the failure is fatigue. So it is very important and prestigious work to study the different reasons, behavior and aspects of fatigue failure so that the best possible life of a given specimen, types of fracture and its features can be studied. The material selected for this current investigation is EN9 which contains 0.52% carbon. It is selected because of its wide applicability in engineering application especially in shaft application. Further it is subjected to different heat treatment processes at different temperatures and for different time period. The microstructure analysis has done before and after heat treatment. The endurance limit was also determined for all the cases.

Medium Carbon Steel, Fatigue failure, EN9 Steel, Heat Treatment, Endurance Limit

"Fatigue Behavior Analysis of Differently Heat Treated EN9 Steel", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.227-235, June 2019, Available :http://www.jetir.org/papers/JETIR1907337.pdf

"Fatigue Behavior Analysis of Differently Heat Treated EN9 Steel", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp227-235, June 2019, Available at : http://www.jetir.org/papers/JETIR1907337.pdf