DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
ADA010886
Title:
Structure and Properties of Cast Alloys: (1) The Growth and Thermal Stability of Unidirectionally Solidified Nb-Nb2C Composites; (2) Structure and Properties of Cast Nonferrous Alloys.
Corporate Author:
PITTSBURGH UNIV PA DEPT OF METALLURGICAL AND MATERIALS ENGINEERING
Report Date:
1975-02-01
Abstract:
By a floating zone melting and freezing technique, eutectic and hyper-eutectic Nb-Nb2C alloys may be grown with well aligned two phase composite structures. The morphology of the carbide phase may be rod-like, plate-like or a combination of rods and plates depending on the growth rate and carbon content. The rod spacing or plate-spacing is a function of growth rate. The structural stability of as grown rod-like Nb-Nb2C composites grown at two different growth rates and the stability of deformed Nb-Nb2C composites have been examined after isothermal annealing at temperatures in excess of one half the eutectic temperature for periods up to 700 hrs. In part two, aspects of cast structure, including interfaces, segregation, particles, and discontinuities, are discussed in relation to their dependence on casting conditions and in relation to their effect on properties.
Descriptive Note:
Interim rept.,
Pages:
0052
Contract Number:
N00014-75-C-0800
File Size:
0.00MB
