Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 23    No. 9    September 2013

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Rheological characteristics of injection molded titanium alloys powder
Jia-hui WANG1, Qing-nan SHI2, Cheng-ling WU1, Jian XI2

1. City College, Kunming University of Science and Technology, Kunming 650051, China;
2. Faculty of Materials Engineering, Kunming University of Science and Technology, Kunming 650093, China

Abstract:Ti-6Al-4V alloy powder was taken as raw material. 60% (mass fraction) paraffin, 35% low density polyethylene and 5% stearic acid were employed as binders to prepare injection feedstocks. Capillary rheometer was adopted to determine the rheological parameters and to analyze the rheological properties of the feedstocks at different milling time, powder loading and temperature. It is indicated through the results that the viscosity increases and the value of n decreases with the increase of milling time. The more the powder loading is, the higher the viscosity is. The empirical formula on the relationship between the viscosity and the powder loading is: . The value m is calculated as 0.33. The flow activation energy Ea decreases with the increase of shear rate.

 

Key words: injection molding; titanium alloy; feedstock; rheological properties

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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