Study on Mechanical Relaxations of 7075 (Al–Zn–Mg) and 2024 (Al–Cu–Mg) Alloys by Application of the Time-Temperature Superposition Principle

Figure 1

Isothermal storage modulus (a) and loss modulus (b) versus logarithm of the frequency from DMA tests on AA 7075-T6 at frequencies ranging from 1 to 100 Hz and from 50 to 375°C.

(a)

(b)