Pilot Production and Evaluation of Tantalum Alloy Sheet
Abstract
Studies of the processing and properties of tantalum rich alloys in the Ta-W-Hf system were carried out. Procedures for the production of pilot quantities of low interstitial T-111 (Ta-8W-2Hf) sheet from 3-in. diameter ingots were developed, and detailed evaluations of mechanical and physical properties were conducted. The effects of intentional additions of interstitial elements, carbon, oxygen, and nitrogen, on fabricability, weldability, and mechanical properties of T-111 were investigated. Limited amounts of carbon and nitrogen improved mechanical properties while oxygen had little or no effect. Interstitial additions on the order of 0.03 wt-% had no adverse effect on fabricability or weldability. The determination of the optimum composition of T-111 with respect to the substitutional solutes, tungsten and hafnium, consistent with good fabricability, weldability, and high temperature strength is described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1963
- Accession Number
- AD0409896
Entities
People
- R. L. Ammon
- R. T. Begley