Accession Number : ADA017452

Title :   High Toughness Titanium Alloy Development.

Descriptive Note : Final technical rept. Apr 74-Jul 75,

Corporate Author : ROCKWELL INTERNATIONAL CORP LOS ANGELES CALIF LOS ANGELES AIRCRAFT DIV

Personal Author(s) : Berryman,R. G. ; Froes,F. H. ; Chesnutt,J. C. ; Rhodes,C. G. ; Williams,J. C.

Report Date : JUL 1975

Pagination or Media Count : 112

Abstract : This is the final engineering report for a Naval Air Systems Command sponsored program to develop new titanium alloys for aircraft applications. During the first of the two phases in this effort, four thermomechanical processing/final heat treatment sequences were evaluated for each alloy. Evaluations at the conclusion of this phase revealed that mechanical properties of three of the four process conditions investigated for Ti-5Mo-4.5Al-1.5Cr met or exceeded the high toughness/moderate strength goal, indicating good reproducibility of these properties over a wide range of processing conditions. On the other hand, mechanical properties of the alloy designed to meet the moderate toughness goal at high strength levels, Ti-8Mo-2.5Al-4.5Cr, fell short of those goals. Because of a real need to develop an alloy of this type, particularly for forging applications, the second phase of this effort was concentrated on further development of this latter alloy.

Descriptors :   *Titanium alloys, *Airframes, Toughness, Tensile strength, Molybdenum alloys, Aluminum alloys, Chromium alloys, Forging, Heat treatment

Subject Categories : Aircraft
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE