Thermal Expansion Behaviour of Ternary Nickel-Based, Cobalt-Based, and Iron-Based Alloys Containing Very High Fractions of Carbides

Table 1

Thermal expansion coefficients measured on the dilatometry curves, deformation at 𝑇 reaching 1200°C, deformation and total deformation values after the 1200°C-isothermal stage (Δ𝜀_1200%) and after return to 100°C (Δ𝜀_100%)—nickel-based alloys.

Temperature (°C)	Average linear thermal expansion coefficient (×10^−6°C^−1)
	Ni-30Cr-2.5C	Ni-30Cr-3.0C	Ni-30Cr-3.5C
Average 𝛼 (10^−6 K^−1)	16.6	18.2	17.8
𝑇 range for 𝛼	100–1200°C	100–1200°C	100–900°C
𝜀1200% end heating	1.843	2.012	1.674
𝜀1200% start cooling	1.751	1.881	1.439
Total Δ𝜀1200%	−0.092	−0.131	−0.235
Total Δ𝜀100%	−0.035	+0.077	−0.180