VNU Journal of Science Mathematics – Physics, Vol 37, No 2 (2021) 31 42 31 Original Article Combining the Mie Lennard Jones and the Morse Potentials in Studying the Elastic Deformation of Interstitial Alloy AGC with FCC Structure under Pressure Nguyen Quang Hoc1, Vu Quoc Trung1, Nguyen Duc Hien2,*, Nguyen Minh Hoa3 1Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam 2Mac Dinh Chi High School, 21 Quang Trung, Phu Hoa, Chu Pah, Gia Lai, Vietnam 3Hue University of Med[.]