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:

1975-07-01

Pagination or Media Count:

112.0

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 processingfinal 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 toughnessmoderate 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