Creep properties of ball-milled and HIPed pure tantalum

• Published in: Scripta materialia Vol. 45; no. 4; pp. 447 - 454
• Main Authors: Xu, Q, Hayes, R.W, Lavernia, E.J
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Ltd 31.08.2001; Elsevier Science
• Subjects: Applied sciences; Ball-milling; Creep; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; HIP; Materials science; Materials synthesis; materials processing; Metals. Metallurgy; Physics; Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation; Tantalum; Tantalum; Creep; Ball-milling; HIP; Ball mill; Metal powder; Hot isostatic pressing; Mechanical properties; XRD; Experimental study; Powder metallurgy; Sintered metal; Sintering; Powder grinding; Microstructure
• DOI: 10.1016/S1359-6462(01)01044-2
• ISSN: 1359-6462

A relatively new processing approach which could reduce manufacturing costs emcompasses the hot isostatic pressing of net and near-net shapes from particulate material. In addition to minimizing machining, this method also has the capacity to improve microstructural and mechanical properties. The equivalent creep properties between powder source samples and wrought ones suggest that powder metallurgy is a viable approach for attaining equivalent high temperature properties in the refractory metals and alloys. Ball-milling is one of various techniques for the synthesis of nanocrystalline alloys. In this process, powders are repeatedly fractured and welded during collisions among the rapidly moving balls and the containment vessel. This technique may be used to synthesize nanocrystalline alloys from pre-alloyed powders (referred to as 'mechanical milling') as well as from elemental powder blends ('mechanical alloying'). In the present study, bulk Ta material was produced by using ball-milling and HIP techniques, and its creep properties were evaluated. The objective of this paper is to provide the preliminary results about the ball-milled and HIPed pure Ta.