Temperature and Stress Evaluation during Three Different Phases of Friction Stir Welding of AA 7075-T651 Alloy

Table 2

Variation of thermal and mechanical properties of AA 7075.

Temperature (°C)	Thermal conductivity (W/m·°C)	Density (kg/m^3)	Young’s modulus (GPa)	Poisson’s ratio	Coefficient of thermal expansion (1/°C)	Specific heat capacity (J/Kg·°C)
25	130	2810	71.1	0.33	2.16E − 005	870
100	186	2800	65.2	0.33	2.34E − 005	910
200	197	2770	56.3	0.33	2.36E − 005	960
300	194	2750	38.0	0.33	2.43E − 005	980
400	196	2730	31.5	0.33	2.52E − 005	1040
500	196	2700	25.0	0.33	2.61E − 005	1100
532	193	2690	24.0	0.33	2.75E − 005	1110