Effect of Deformation Processing on Mechanical Properties of Nb-10 a/o Si In-situ Composite

Authors

Isaac Weiss
M. Thirukkonda
Raghavan Srinivasan, Wright State University - Main CampusFollow

Document Type

Conference Proceeding

Publication Date

1994

Abstract

Nb-10 a/o Si alloy is an in-situ composite. The microstructure of the cast alloy consists of pro-eutectic Nb dendrites distributed in a matrix of eutectic Nb₃Si + Nb phases. The microstructure of the as-cast alloy was modified by multiple hot extrusions producing an oriented composite. Extensive grain size refinement occurred in both the Nb and Nb₃Si phases. The ductile primary (pro-eutectic) Nb particles were aligned along the extrusion direction. Bend strength and fracture toughness measured by three point bend and four point bend tests, respectively, showed that both the yield strength and fracture toughness of the alloy increases considerably following this thermomechanical processing. These improvements have been attributed to the changes in size, morphology and spacing of the constituent phases and their microstructural refinement.

Comments

Presented at Symposium F on High Temperature Silicides and Refractory Alloys, held in conjunction with the 1993 Fall Materials Research Society (MRS), Boston, MA.

Copyright © Materials Research Society 1994.

Repository Citation

Weiss, I., Thirukkonda, M., & Srinivasan, R. (1994). Effect of Deformation Processing on Mechanical Properties of Nb-10 a/o Si In-situ Composite. MRS Symposium Proceedings: High-Temperature Silicides and Refractory Alloys, 322.
https://corescholar.libraries.wright.edu/mme/155

DOI

10.1557/PROC-322-377