Accession Number : AD0772725

Title :   Titanium Castings Today,


Personal Author(s) : Kura,J. G.

Report Date : DEC 1973

Pagination or Media Count : 118

Abstract : Titanium castings weighing from a few grams to over half a ton are being produced. Three foundries produce castings in rammed graphite molds chiefly for applications where high resistance to corrosion is important. Three other foundries use investment molds exclusively to produce precision castings, chiefly for the aerospace industry. Maximum pour weight is about 350 pounds. Investment castings are almost free of surface contamination while rammed-mold castings have a contaminated skin that does not affect the corrosion resistance of the castings. The contaminated skin can be completely removed by chemical milling. Casting design guides and inspection standards are similar to those used for steel castings or superalloy castings. Defects encountered are similar to those common to other castings. Weld repairing of defects is practiced and, when properly done, has no adverse effect on the properties of the castings. Radiographic standards are being developed specifically for titanium castings. One rammed-mold foundry uses a water-soluble core which allows the production of cored cavities of complex shapes. Several grades of castings are produced in unalloyed titanium and in the Ti-6Al-4V alloy. In general, the mechanical properties of titanium castings compare favorably with those for forgings. (Author)

Descriptors :   *Castings, *Casting, *Titanium, *Titanium alloys, Mechanical properties, Specifications, Production, Utilization, Microstructure, Corrosion

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE