Hastelloy Molybdenum Segregation Tendency
Hastelloy molybdenum segregation tendency: Local enrichment of molybdenum and tungsten during solidification in nickel alloys. Requires homogenization through targeted post-treatments.
Physical-Chemical Mechanism of Action
During solidification of Hastelloy molybdenum, the metal alloys in a complex crystal lattice. Molybdenum and tungsten become locally enriched, leading to uneven distribution.
Metallurgical Relevance & Welding Risks
This segregation tendency can lead to local stresses and cracking. The uneven distribution of additives impairs the strength and toughness of the material, which can be particularly dangerous at high temperatures and under chemical loads.
Workshop Practice & Action Guidelines
To minimize segregation tendency, homogenization is necessary. This is done through uniform heat treatment (e.g., austenitizing and quenching) or diffusion treatment. The exact temperature and time for homogenization must be precisely maintained depending on the alloy and application.