A Study on the Tensile and Fracture Toughness Behavior of Pure Rhenium Metal
Abstract
High-temperature tensile properties of pure rhenium metal were studied to better understand the materials behavior under load at elevated temperatures. Different processing procedures, particularly hot isostatically pressing (HIP) and diffusion bonding of cold-rolled plate, cause microstructure differences (grain size, porosity, texture) that significantly affect the resulting tensile properties. For this study, tensile specimens were tested at 2500 deg F and characterized through extensive metallography and fractography. Results indicate rhenium is inherently ductile at 2500 deg F with transgranular fracture being the dominant fracture mode. The HIPed specimens deform primarily through slip while the cold-rolled specimens deform through twinning. Additionally, the stress/strain properties of the HIPed material are consistently better than the cold-rolled plate. Fracture toughness testing on cold-rolled rhenium plate was conducted at room temperature. Two plates of different thickness and grain sizes were tested per ASTM E 1820 and evaluated using Appendix A9: JIC and KJIC Evaluation. The two plates yielded significantly different results, likely due to the difference in the percent cold-work and grain size between the plates.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2006
- Accession Number
- AD1068151
Entities
People
- Amy C. Robinson
- Brian P. L'heureux
- Jennifer G. Gaies
- Xian J. Zhang
Organizations
- Naval Surface Warfare Center Carderock Division