Evaluation of Methods to Produce Tough Cr₃Si Based Composites

Author

Terry A. Cruse
Joseph William Newkirk, Missouri University of Science and TechnologyFollow

Abstract

Several methods of improving the toughness of Cr-Cr₃Si composites produced by powder metallurgy have been examined. Mechanical alloying of Cr-3.92 w/o with 0.5 w/o V showed the best improvement in toughness of this phase. Replacing Cr₃Si with a (Cr_0.57, Mo_0.43)₃Si, produced in situ from a mechanically alloyed powder, offered a slight improvement in toughness. By combining these phases a composite was produced with a toughness greater than 10 MPa m^-2. Other second phase materials were also examined for providing second phase toughening of Cr₃Si. These include an Fe-Al alloy, Ni₃Al + B, and 304L stainless steel. At the level of 25 v/o these materials at present do not appear to offer much improvement in toughness. Cr-Cr₃Si composites were hot forged to produce a more layered microstructure and refine the micro structure of arc-melted samples. The layered micro structure should be tougher, but has not been tested yet.

Recommended Citation

T. A. Cruse and J. W. Newkirk, "Evaluation of Methods to Produce Tough Cr₃Si Based Composites," Materials Science and Engineering: A, vol. 239-240, pp. 410 - 418, Elsevier, Dec 1997.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Chromium Compounds; Chromium Powder Metallurgy; Composite Materials; Forging; Mechanical Alloying; Microstructure; Toughness; Chromium Silicide; Second Phase Toughening; Intermetallics; Cr-Cr3Si Composites; Layered Microstructure; Powder Metallurgy; Second Phase Toughening

International Standard Serial Number (ISSN)

0921-5093

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1997 Elsevier, All rights reserved.

Publication Date

01 Dec 1997