Plastic Flow and Fracture Processes in Powder Metallurgical Nickel-Base Superalloys.
Abstract
The use of fine-mesh powder has been suggested as a method to alleviate the non-metallic inclusion problems in current powder products. In the present study, -325 mesh MERL 76 loose powder was characterized in detail and the properties of the consolidation compared with those of the -80 mesh powder. Higher interstitial contents and some interesting powder microstructures have been observed in the -325 mesh powder. However, no influence of these powder variables on tensile and stress-rupture properties of either fine-grain or coarse grain consolidations has been observed. During the course of the first-year and the current second-year efforts in this program, notch-rupture has emerged as an interesting and poorly understood phenomenon. A major effort has, therefore, been directed to the elucidation of the rupture mechanism and to identify important variables.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1979
- Accession Number
- ADA068909
Entities
People
- C. C. Law
- M. J. Blackburn
Organizations
- Pratt & Whitney