Thermodynamic modelling of the M6C carbide in cemented carbides and high-speed steel

Thermodynamics of the S–Sn system: Implication for synthesis of earth abundant photovoltaic absorber materials

“…The CALPHAD technique has been used extensively and successfully for many types of material systems. For example, it has been an important tool for alloy development of tool steels (Frisk et al, 2005;Lindwall and Frisk, 2013), Ni-base superalloys (Campbell et al, 2002;Kattner, 2002;Saunders et al, 2000) as well as to model complex behavior of oxides (Kjellqvist and Selleby, 2010;Kjellqvist et al, 2008;Lindwall et al, 2015) and cemented carbides (Ekroth et al, 2000;Frisk et al, 2005). Another example relevant for the current work, is the boron-magnesium (B-Mg) system (Liu et al, 2001b) where the developed description was used to calculated T-x, P-x and P-T diagrams for the purpose to guidance when selecting process condition for preparation of MgB 2 superconductor films (Liu et al, 2001a).…”

Effect of Heat Treatment on Microstructure and Properties of Improved 40CrNi2Si2MoV Steel

“…As shown in Figure 5d, the size of the long carbides decreases significantly (7 nm) in the 1050 °C quenched steel; the carbide particles are nearly spherical and are dispersed on the laths and subgrain boundaries, which have a pinning effect on the grain boundaries. [ 31 ] There is no dislocation accumulation or dislocation cells around it. In addition, martensitic laths, inclusions, and block substructures can be clearly seen in the prior austenite grains.…”

Detection of Microstructural Changes in Metastable AISI 347, HSS Z-M4 and Tool Steel Ferrotitanit WFN by Mechanical Loss Coefficient at Ultrasonic Frequencies

“…Figure 7 shows the microstructure of the materials. The roundly shaped M x C (M = Cr, V, W, Mo) in Z-M4 [ 26 , 27 ] as well as TiC [ 14 ] in WFN are embedded in an initially smooth matrix ( Figure 7 a,b) that changes to a needle shaped phase, as it is characteristic for martensite ( Figure 7 c,d). Similarly, the microstructure of the longitudinal section of an AISI 346 VHCF-specimen after N = 10 9 cycles at a stress amplitude 270 MPa is shown in Figure 7 e. The specimen showed 0.00 FE-% in its shafts and 5.7 FE-% in the gauge length corresponding to the dark area that indicates the deformation induced α′-martensite and to the bright α′-martensite free areas in the shafts [ 28 ].…”