The Influences of Oxygen Content and Heat Treatment on the Plastic and Fracture Properties of Ti-8 Al Alloy PDF Download

Author: Jae Young Lim
Publisher:
ISBN:
Category :
Languages : en
Pages : 110

View

Book Description

Author: A. GIUNTOLI
Publisher:
ISBN:
Category :
Languages : en
Pages : 1

View

Book Description
After heat treatment consisting of solution treatment at 1700 F and aging at 1000 F for 3 hours, high oxygen material displayed consistently good mechanical properties up to 500 F, the highest temperature investigated. After heat treatment consisting of solution treatment at 1650 F and aging at 900 F for 6 hours the high oxygen material displayed consistently good mechanical properties up to 650 F, the highest temperature investigated. The oxygen contents of the nominal and high materials were 0.13 and 0.19%, respectively, and their hydrogen contents were 0.0250 and 0.0094%, respectively. The consistently higher ductility of the high oxygen content material was chiefly attributed to its low hydrogen content. (Author).

Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1796

View

Book Description

Author: Gerhard Welsch
Publisher: ASM International
ISBN: 9780871704818
Category : Technology & Engineering
Languages : en
Pages : 1206

View

Book Description
Comprehensive datasheets on more than 60 titanium alloys More than 200 pages on metallurgy and fabrication procedures Input from more than 50 contributors from several countries Careful editorial review for accuracy and usefulness. Materials Properties Handbook: Titanium Alloys provides a data base for information on titanium and its alloys, and the selection of specific alloys for specific applications. The most comprehensive titanium data package ever assembled provides extensive information on applications, physical properties, corrosion, mechanical properties (including design allowances where available), fatigue, fracture properties, and elevated temperature properties. The appropriate specifications for each alloy are included. This international effort has provided a broad information base that has been compiled and reviewed by leading experts within the titanium industry, from several countries, encompassing numerous technology areas. Inputs have been obtained from the titanium industry, fabricators, users, government and academia. This up-to-date package covers information from almost the inception of the titanium industry, in the 1950s, to mid-1992. The information, organized by alloy, makes this exhaustive collection an easy-to-use data base at your fingertips, which generally includes all the product forms for each alloy. The 60-plus data sheets supply not only extensive graphical and tabular information on properties, but the datasheets also describe or illustrate important factors which would aid in the selection of the proper alloy or heat treatment. The datasheets are further supplemented with back-ground information on the metallurgy and fabrication characteristics of titanium alloys. An especially extensive coverage of properties, processing and metallurgy is provided in the datasheet for the workhorse of the titanium industry, Ti-6Al-4V. This compendium includes the newest alloys made public. even those still under development. In many cases, key references are included for further information on a given subject. Comprehensive datasheets provide extensive information on: Applications, Specifications, Corrosion, Mechanical Design Properties, Fatigue and Fracture

Author: J. Y. Lim
Publisher:
ISBN:
Category :
Languages : en
Pages : 22

View

Book Description
It is shown that for a Ti-8 wt.%Al alloy aged at a temperature high in the two-phase region (695C) to precipitate the ordered alpha 2 phase, an increase in oxygen content from 600 ppm to 12 ppm increases the yield strength by approximately 10% and decreases the fracture strain from 20 to 1% elongation at room temperature. The fracture mode is changed from dimpled rupture to cleavage. It is demonstrated that oxygen additions alter the position of the alpha/alpha + alpha 2 coherent solvus, resulting in formation of coherent alpha 2 in specimens containing approximately or more than 1000 ppm oxygen aged at 695C. For a given aging time the volume fraction of alpha 2 increases with increasing oxygen up to 1300 wt.ppm and then levels off. The changes in mechanical behavior are attributed to the presence of alpha 2. The experimental evidence suggests that oxygen partitions preferentially into alpha 2.

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 940

View

Book Description

Author: Faustine Ndali Busongo
Publisher:
ISBN: 9783832246433
Category : Titanium alloys
Languages : en
Pages : 121

View

Book Description

Author: CF. Hickey
Publisher:
ISBN:
Category : Hardness
Languages : en
Pages : 4

View

Book Description
The effect of heat treatment on the mechanical properties (including fracture toughness) of the titanium alloy Ti-6Al-6V-2Sn has been investigated. Based upon a preliminary hardness survey of solution temperatures from 1300 to 1800°F, solution treatment temperatures of 1400, 1550, and 1700°F were selected for further aging heat treatments ranging from 700 to 1100°F for times up to 32 h. X-ray and electron microscopic observations and elastic modulus determinations were employed and correlated with the mechanical property data. A detailed discussion of the results and observations is contained in this paper.

Author: Lisa Jane Hunter
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description

Author: D. J. Truax
Publisher:
ISBN:
Category :
Languages : en
Pages : 33

View

Book Description
A program of research was conducted to determine the effects of Al content and Ti3Al precipitation o the micro- and macroplastic behavior of Ti-Al alloys, and also to investigate the effects of Al content and Ti3Al on the susceptibility to, and mechanism of, stress corrosion cracking in a methanol - 1.5% HCl environment. The tensile microstrain parameters sigma sub E and sigma sub A increase with Al content. Tests on aged Ti-6 and Ti-8 wt. % Al material indicate that the influence of Ti3Al on the microstrain parameters and flow stress is athermal. Stress corrosion specimens which had been solution treated and quenched failed primarily by intergranular parting. Specimens in the aged condition exhibit a mixture of cleavage fractures and some intergranular parting. It is thought that stress corrosion failure in Ti-Al alloys proceeds as a consequence of anodic dissolution. (Author).