Influence of temperature and heat treatment on the crack resistance of powder metallurgy tungsten

1983 ◽  
Vol 19 (1) ◽  
pp. 48-51
Author(s):  
E. I. Uskov ◽  
A. V. Babak ◽  
N. D. Bega
Keyword(s):  
Heat Treatment ◽  
Powder Metallurgy ◽  
Crack Resistance ◽  
Influence Of Temperature ◽  
Powder Metallurgy Tungsten

The Effect of Forging Variables on the Supersolvus Heat-Treatment Response of Powder-Metallurgy Nickel-Base Superalloys

2014 ◽  
Vol 45 (13) ◽  
pp. 6231-6251 ◽  
Author(s):  
S. L. Semiatin ◽  
J. M. Shank ◽  
A. R. Shiveley ◽  
W. M. Saurber ◽  
E. F. Gaussa ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Powder Metallurgy ◽  
Treatment Response ◽  
Nickel Base Superalloys ◽  
Nickel Base

Influence of Temperature and Water Activity on Aflatoxin Production by Aspergillus flavus in Cowpea (Vigna unguiculata) Seeds and Meal

1985 ◽  
Vol 48 (12) ◽  
pp. 1040-1043 ◽  
Author(s):  
P. E. KOEHLER ◽  
L. R. BEUCHAT ◽  
M. S. CHHINNAN
Keyword(s):  
Heat Treatment ◽  
Water Activity ◽  
Aspergillus Flavus ◽  
Vigna Unguiculata ◽  
Dry Weight ◽  
Aflatoxin Production ◽  
Weight Basis ◽  
Influence Of Temperature

Experiments were done to determine the influence of temperature (21, 30 and 37°C) and aw (0.76 to 0.98) on aflatoxin production by Aspergillus flavus on cowpea (Vigna unguiculata) seeds, meal and meal supplemented with onion. Larger quantities of aflatoxin were produced at 21 and 30°C than at 37°C. The highest amount of aflatoxin (2777 μg/20 g, dry weight basis) was observed in meal containing onion at aw 0.98 after 20 d of incubation at 21°C. A level of 870 |μg/20 g was detected in seeds at aw 0.95 after 14 d of incubation at 30°C. Meal at aw 0.96 supported production of 551 μg of aflatoxin per 20 g after 20 d at 30° C. Temperature had little influence on the optimal aw for aflatoxin production in cowpea meal. However, an increase in temperature resulted in a decreased optimal aw for aflatoxin production on whole cowpeas. When known quantities of aflatoxin were added to cowpea meal which was subsequently steamed for 5 min, only 29% was extractable using a variety of procedures, indicating that the toxin may be bound in some manner to cowpea constituents as a result of heat treatment.

scholarly journals Recrystallization Process of Powder Metallurgy Tungsten Wires

1989 ◽  
Vol 53 (12) ◽  
pp. 1198-1207 ◽  
Author(s):  
Shu-Fan Chen ◽  
Hiroyuki Komeda ◽  
Koji Fujii ◽  
Koji Tanoue ◽  
Hidehiko Matsuda
Keyword(s):  
Powder Metallurgy ◽  
Recrystallization Process ◽  
Powder Metallurgy Tungsten
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