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《Journal of University of Science and Technology Beijing》 1987-S1
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Investigation of Internal Porosity of Argon-Atomised FGH95 Alloy Powders

Wang Panxing Du Xiaomei Liu Chuanxt Yu Kelan  
The percentage of porous particles in argon-atomised FGH95 alloy powder and the relationship between average size of pores and the particles size were studied by real density measureng method, stereological metalography and Image Analyser.The study was led to the conclusion that as the particles size increases,both the percentage of porous particles and the average size of pores become larger. Most of the pores are equaxial or sphere like.And the larger the particle size is, the more spherical the shapes of the pores are. The internal porosity of FGH95 alloy powder determined by density method deviates a little from that determined by other two methods. The change regularity obtained by the above three methods is the same.The average size of the porosity measured by optical microscope and by Image Analyzer is also the same.
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