Controlling pool depth during VAR of Alloy 718
نویسندگان
چکیده
منابع مشابه
Characterization of the Dendritic Microstructure of Investment Cast Alloy 718
The as-cast alloy 718 shows a multiphasic structure which consists of dendrites, carbides and Laves phases. The amount, size, shape, and dispersion of these phases affect the properties and the processing which follows, This structure was characterized by measurements of volume fraction, size, dispersion, and shape factor of carbide and Laves phases. Secondary arm spacing and Vickers hardness w...
متن کاملModeling and Simulation of Alloy 718 Microstructure and Mechanical Properties
Alloy 718 is a unique superalloy that has been in use for a number of years. It also has the distinction to be utilized throughout the aerospace and general industrial communities. The applications for this material are often very unique and require tailoring of the microstructure and subsequently the mechanical properties to meet these specific needs. To support optimization of Alloy 718 mecha...
متن کاملEffect of Microstructural Variations on the Tensile and Fracture Toughness Properties of Alloy 718 Welds
The effect of microstructural variations on the tensile and fracture toughness properties of Alloy 718 welds is reviewed. The microstructural parameters surveyed include heat treatment, longterm thermal aging and neutron irradiation. The two heat treatments that were characterized include the conventional heat treatment, per ASTM B637, and a modified heat treatment designed to improve the tough...
متن کاملAn Investigation of the Homogenization and Deformation of Alloy 718 Ingots
The segregation of Alloy 718 ingots and the technical factors which affect the ingot homogenization practice are studied in this paper. The segregation and melting point of Alloy 7 18 ingots are studied by DTA, electron microprobe and structure analysis. The elimination of Laves phase is studied in detail. After the solution of Iaves phase the segregation elimination of Nb is reviewed further. ...
متن کاملEstimating Pool-depth on Per Query Basis
This paper demonstrates a simple and pragmatic approach for the creation of smaller pools for evaluation of ad hoc retrieval systems. Instead of using an apriori-fixed depth, variable pool-depth based pooling is adopted. The pool for each topic is incrementally built and judged interactively. When no new relevant document is found for a reasonably long run of pool-depths, pooling can be stopped...
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ژورنال
عنوان ژورنال: IOP Conference Series: Materials Science and Engineering
سال: 2016
ISSN: 1757-8981,1757-899X
DOI: 10.1088/1757-899x/143/1/012014