Mechanical Behavior of metallic Materials 500 Forged 400 Extruded 乏300 200 100 0.5 1.5 2.5 Fig. 9. Comparison of tensile behavior of sinter-forged 2080/SiC/20p- T6 composite versus extruded composite
Mechanical Behavior of Metallic Materials
Mechanical Behavior of metallic Materials 20 um Plastically transformed walls of the dimples in the phase ③千大
Mechanical Behavior of Metallic Materials Plastically transformed walls of the dimples in the phase
Mechanical Behavior of metallic Materials ●Hook'slaw:o=EE Youngs modulus or modulus ofelasticity: E strength of the inter-atomic forces between adjacent atoms or ions and relatively insensitive to changes in microstructure For metals and ceramics. E values will decrease with increasing temperature Elastic deformation reversible strain Brittle materials: glasses, rocks, many ceramics, heavily cross linked polymer, some metals at low temperature ③大季
Mechanical Behavior of Metallic Materials ⚫ Hook’s law: = E ⚫ For metals and ceramics, E values will decrease with increasing temperature. ⚫ Elastic deformation: reversible strain ⚫ Brittle materials: glasses, rocks, many ceramics, heavily crosslinked polymer, some metals at low temperature Young’s modulus or modulus of elasticity: E strength of the inter-atomic forces between adjacent atoms or ions and relatively insensitive to changes in microstructure
Mechanical Behavior of metallic Materials Strength level Proportional limit Elastic limit Yield strength or 0.2 offset yield strength(A) a stress level related to the onset of irreversible plastic deformation o Ultimate tensile strength(C e True fracture strengt th b5y500.250f 0.002
Mechanical Behavior of Metallic Materials Strength level ⚫ Proportional limit ⚫ Elastic limit ⚫ Yield strength or 0.2 offset yield strength (A) a stress level related to the onset of irreversible plastic deformation ⚫ Ultimate tensile strength (C) ⚫ True fracture strength 0.2 , , , b y f
Mechanical Behavior of metallic Materials Tensile Properties for Selected Alloys Material Treatment Tensile Yield Strength, MPa Strength, MPa Elongation 1015 steel As-rolled 420 315 39 1050 steel As-rolled 7 A 415 20 1080 steel As-rolled 965 585 12 Ti-5A1-2. 5Sn annealed 860 805 16 Ti-8A1-1Mo-1V annealed 1000 950 15 AZ31B Mg annealed 220 105-125 9-12 AZ80A Mg Extruded bar 290-295 185-195 4-9 2024Al T3 485 345 18 2024A T6,T651 475 395 10 6061AI T4,T451 240 145 23 7075AI T6 570 505 11 ③千大
Mechanical Behavior of Metallic Materials Material Treatment Tensile Strength,MPa Yield Strength,MPa Elongation 1015 steel As-rolled 420 315 39 1050 steel As-rolled 725 415 20 1080 steel As-rolled 965 585 12 Ti-5Al-2.5Sn annealed 860 805 16 Ti-8Al-1Mo-1V annealed 1000 950 15 AZ31B Mg annealed 220 105-125 9-12 AZ80A Mg Extruded bar 290-295 185-195 4-9 2024 Al T3 485 345 18 2024 Al T6, T651 475 395 10 6061 Al T4, T451 240 145 23 7075 Al T6 570 505 11 Tensile Properties for Selected Alloys