Реферат: Механические свойства элементов Периодической системы Менделеева

Elongation at Break 25% Longitudinal or Transverse

Hafnium (Strip)

Tensile Strength, Ultimate 450 MPa Longitudinal or Transverse

Tensile Strength, Yield 170 MPa Longitudinal

Tensile Strength, Yield 275 MPa Transverse

Elongation at Break 30% Longitudinal or Transverse

Tantalum (Annealed)

Hardness, Brinell 95 Converted from Vickers for 3000 kg load/10 mm ball Brinell test

Hardness, Rockwell A 35 Converted from Vickers

Hardness, Rockwell B 51 Converted from Vickers

Hardness, Vickers 100

Tensile Strength, Ultimate 450 MPa

Modulus of Elasticity 186 GPa

Poisson's Ratio 0,35

Fatigue Strength 230 MPa 50,000,000 cycles, E-beam melted sample; rotating beam test,

Shear Modulus 69 GPa

Tantalum (Cold Worked)

Hardness, Brinell 195 Converted from Vickers for 3000 kg load/10 mm ball Brinell test

Hardness, Rockwell A 56 Converted from Vickers

Hardness, Rockwell B 92 Converted from Vickers

Hardness, Rockwell C 12 Converted from Vickers

Hardness, Vickers 200

Tensile Strength, Ultimate 900 MPa

Tungsten

Hardness, Brinell 294 Estimated from Vickers

Hardness, Knoop 318 Estimated from Vickers

Hardness, Rockwell A 66 Estimated from Vickers

Hardness, Rockwell C 31 Estimated from Vickers

Hardness, Vickers 310

Tensile Strength, Ultimate 980 MPa

Tensile Strength, Yield 750 MPa 0,2% Offset

Modulus of Elasticity 400 GPa

Poisson's Ratio 0,28