superalloyswelding/ Laves phasesuperalloy 718 weld metalssolidificationNb segregationEffects of the thermally grown wustite on the fatigue crack initiation and growth in HSLA steel are evaluated as a function of oxide thickness, strain amplitude, and gaseous environment in the push-pull plastic strain ...
Investigation of Ta-MX/Z-Phase and Laves Phase as Precipitation Hardening Particles in a 12Pct Cr Heat-Resistant Steel A 12 pct Cr martensitic/ferritic steel was designed and produced to study Laves and Z-phase as precipitation hardening particles under creep conditions (650 °C). According to...
TOPOLOGICALLY CLOSE-PACKED PHASES IN SUPERALLOYS: New Phases and Domain Structures 1 Introduction2 Description of topologically close-packed structures2.1 Coordination polyhedra2.2 Atom layers2.3 Structure units2.4 Classification of phases3 Experimental high-resolution electron microscopy3.1 Preparation of specimens...
Phase Extraction and Analysis in Superalloys—Second Summary of Investigations by ASTM Subcommittee E04.91 A definite procedure has been established to minimize errors in the identification of X-ray diffraction patterns of superalloy phases. The need for ... RT Horstman,KC Lieb,RL Meltzer,... -...
Laves-phase superalloys[J]. Physica Status Solidi,1992,131( 2) : 415-423.J. D. Livingston, Laves-phase superalloys?, Phys. Stat. Sol. A 131 (1992) 415-423.LIVINGSTON J D. Laves-phase superalloys?[J]. Physica Status Solidi(a), 1992, 131 (2): 415-423....
Understanding the formation and elimination mechanism of TCP phases is the key to promote the development of superalloys. In this study, C15-Laves phase was first found in a Hf-containing Co-based superalloy, meanwhile, the formation mechanism and thermal stability of the C15-Laves phase were ...
Laves phases are regarded as topologically close pack phases in superalloys, which damage mechanical properties, especially notch sensitivity of the material. However, here we innovatively found that the formation of large blocky primary Laves phase in Thermo-Span alloys does not cause notch sensitivity...
Laves phaseCrystal structureSynchrotron radiationTransmission electron microscopy TEMZrCo2 and HfCo2 Laves phases were found and characterized in γ-γ′ Co-base superalloys using high-energy X-ray diffraction, energy dispersive X-ray spectroscopy and transmission electron microscopy. They formed during ...
The alloys showed a high thermoshock resistance in spite of the comparatively high brittle to ductile transition temperature. The prospects of alloy development were discussed.G. Sauthoff中国有色金属学会会刊:英文版Sauthoff G.Laves phase alloys for high temperature applications. Transactions of ...
Topologically close-packed (TCP) phases such as Laves phases are usually considered to harm the mechanical properties of classical superalloys for high-temperature applications. However, if an optimal fraction and size are designed, this situation can completely change for some compositionally complex ...