Wrought TiAl Blades

What Hath We Wrought?

Cost - Effective TiAl based Materials

Because of their inherent low ductility, TiAl-based materials are difficult to fabricate, especially thin gage titanium gamma aluminide (TiAl) sheet and foil. In this paper, an innovative powder metallurgy approach for producing cost-effective thin gage TiAl sheets (with 356 mm long and 235 mm wide, and a thickness of 0.74, 1.09, 1.55, and 2.34 mm, respectively) is presented. The microstructure...

Isothermal and cyclic oxidation of TiAl composites

Titanium Aluminide and TiAl matrix composites reinforced with alumina fibers (PRD166) were fabricated by powder metallurgy. During isothermal oxidation at 950 and 1070 OC, composites containing PRD166 fibers exhibited larger weight gains than monolithic TiAI; the composites showed evidence of oxidation along the perimeter of the fibers. A fiber reaction, which was observed after oxidation in ai...

Travel bans will increase the damage wrought by ebola.

Cases of Ebola that have turned up in Dallas and New York City have prompted calls for a travel ban to prohibit travelers from Sierra Leone, Liberia, and Guinea from entering the US during the ongoing Ebola outbreak. But travel bans have not worked in past epidemics and will not stop Ebola from spreading. Banning travel would slow the movement of people and goods to those countries, harm the in...

Brian Blades , William Ford Anid

P ULMONARY ARTERY aneurysms are relatively rare lesions. One hundred and fifty-two cases have been found in world literature. The purpose of this communication is to review briefly available information on the subject and to report a case in which successful surgical treatment has been achieved. Boyd and MeGavack,' in 1939, reported 111 cases of pulmonary aneurysm proved at necropsy. In 1947, D...