TY - JOUR
TI - Thermal effect of quench rate on mechanical properties of SIMA 7075-T6
AU - Guner Ali Tekin
AU - Dispinar Derya
AU - Tan Engin
JN - Thermal Science
PY - 2023
VL - 27
IS - 4
SP - 3199
EP - 3208
PT - Article
AB - In this study, thermal effects of quench rate on mechanical properties of  7075-T6 alloy fabricated by strain induced melt activation (SIMA) process  were investigated. The T6 heat treatments were applied in various  parameters after SIMA: solutionizing at 490°C for 15-30-45-60-120 minutes,  quenching at 60-100°C, and aging at 120°C for 12-24-48 hours. Optical and  SEM analyses were performed for characterization, hardness, and tensile  tests for mechanical evaluation. Analysis of variance tests was carried out  to indicate the validity of the interactions quenching temperatures and  tensile properties. Secondary phases were dissolved homogeneously after  solutionizing but at higher quenching temperatures and reprecipitated,  particularly at grain boundaries. Strength values decreased with increasing  quenching temperature. Analysis of variance tests suggest that cryogenic  quenching can further increase the tensile properties. Oxide bifilms,  porosities, low surface quality, and continuous brittle secondary phases  surrounding spheroidal particles reduce the mechanical properties.