Accession Number:

ADA379268

Title:

Fatigue Behavior of Toughened Materials

Descriptive Note:

Final rept. 1 May 1996-31 Dec 1999

Corporate Author:

CASE WESTERN RESERVE UNIV CLEVELAND OHDEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

• Lewandowski, John J.
• Aikin, Robert M.

Report Date:

2000-03-01

Pagination or Media Count:

37.0

Abstract:

The mechanisms controlling the fatigue and fracture behavior of material toughened with ductiletough phases are the focus of this work. This research is utilizing materials processed at WPAFB from the binary Nb-Si system, as well recently developed Nb-Ti-Hf-Si-Al-Cr i.e. at GE CRD base materials in order to determine the factors controlling the mechanical behavior under both monotonic and cyclic loading conditions. Considerable work has already demonstrated the positive effects of compositing Nb5 Si3 with Nb on the toughness of such materials, although relatively little is known regarding the cyclic fatigue behavior of the materials obtained from the binary Nb-Si systems as well as those obtained via alloying. A complementary AASERT program investigated the fracture and fatigue behavior of bulk metallic glasses produced at California Institute of Technology and Howmet, Inc.

Descriptors:

• *FRACTURE(MECHANICS)
• *FATIGUE(MECHANICS)
• MECHANICAL PROPERTIES
• COMPOSITE MATERIALS
• LOADS(FORCES)
• TOUGHNESS
• AMORPHOUS MATERIALS
• GLASS
• BULK MATERIALS
• SILICIDES
• NIOBIUM ALLOYS

Subject Categories:

• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE