Activated sintering of Tungsten heavy alloy
نویسندگان
چکیده
منابع مشابه
SURFACE HARDENING OF TUNGSTEN-BASED HEAVY ALLOY VIA PACK BORONIZING
The boronizing of a tungsten heavy alloy containing Ni and Fe as the major alloying elements were performed in the present study to increase its surface hardening. Pack cementation method was employed as a well-known, successful solid-state process for boronizing. The coating treatment was accomplished at different temperatures of 1000, 1050 and 1100°C for 6 and 9 hours. The formation of tu...
متن کاملComputer Study of Skeletal Settling Combined with Extrication of Solid Phase Domains during Liquid Phase Sintering of Tungsten Heavy Alloy
In this paper, we investigated numerically gravity induced skeletal settling during liquid phase sintering. The microstructural evolution will be simulated by simultaneous computation of displacement of the center of mass and mass transport due to dissolution and precipitation at the interfaces between solid-phase and liquid matrix. Common to this study based on domain methodology for definitio...
متن کاملDEVELOPMENT OF A TUNGSTEN HEAVY ALLOY, W-Ni-Mn, USED AS KINETIC ENERGY PENETRATOR
Abstract: The objective of this research was to develop a tungsten heavy alloy (WHA) having a microstructure and properties good enough to penetrate hard rolled steels as deep as possible. In addition this alloy should not have environmental problems as depleted uranium (DU) materials. For this purpose a wide spread literature survey was performed and on the base of information obtained in ...
متن کاملFinite Element Simulation of Liquid Phase Sintering with Tungsten Heavy Alloys
Densification and distortion of W-Ni-Fe tungsten heavy alloys during liquid phase sintering are modeled using constitutive laws of grain growth, densification, and deformation. The models are ‘‘calibrated’’ via carefully designed experiments to obtain the necessary parameters to enable modeling. Metallographic analysis of quenched samples is used to obtain grain size data as functions of time a...
متن کاملThin intergranular films and solid-state activated sintering in nickel-doped tungsten
Nickel-doped tungsten specimens were prepared with high purity chemicals and sintered. Although activated sintering starts more than 400 C below the bulk eutectic temperature, the nickel-rich crystalline secondary phase does not wet the tungsten grain boundaries in the solid state. These results contrast with the classical activated sintering model whereby the secondary crystalline phase was pr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science of Sintering
سال: 2017
ISSN: 0350-820X,1820-7413
DOI: 10.2298/sos1704445c