EFFECT OF SPECIMEN DIAMETER AND NOTCH DIAMETER ON THE FRACTURE TOUGHNESS OF AL7075 T6 ALLOY- AN EXPERIMENTAL APPROACH

Trimbak K. Todkari, M. C. Swami, P. S. Patil

Abstract: In this paper fracture toughness (KIC) of Al7075 T6 alloy has been determined by using circumferentially cracked round bar (CCRB) specimen having three specimen diameters (D) 12mm, 10mm,8mm and three notch diameters(d) 10mm,8.3mm,6.7mm respectively with constant D/d ratio as 1.2. The purpose of the study was to determine the effect specimen diameter and notch diameter on the fracture toughness of the Al7075 T6 alloy. The obtained fracture toughness results for different notch diameter are compared with ASTM standards. The result shows that the notch diameter has significant effect on the value of fracture toughness (KIC)

Keywords: Al7075 T6 alloy, CCRB specimen, Fracture toughness, notched specimen.

DOI: https://doi.org/10.15623/ijret.2015.0401012