Mrs. A.Sunanda, Dr. M. V. Jagannadha Raju. “Impact of Controlled Heating and Cooling on Hardness, Impact and Structure of Sand-Casted SAE 1040 Specimen”. International Journal of Advanced Science and Technology, Vol. 29, no. 05, May 2020, pp. 9602 -09, http://sersc.org/journals/index.php/IJAST/article/view/19408.