Report on Principles and Application of Heat Treatment for Titanium Alloys PDF Download

Author: A. J. Griest
Publisher:
ISBN:
Category : Titanium alloys
Languages : en
Pages : 140

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Author: H. J. Henning
Publisher:
ISBN:
Category : Titanium
Languages : en
Pages : 96

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Author: Russell Wanhill
Publisher: Springer Science & Business Media
ISBN: 9400725248
Category : Technology & Engineering
Languages : en
Pages : 58

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This publication reviews most of the available literature on the fatigue properties of β annealed Ti-6Al-4V and titanium alloys with similar microstructures. The focus is on β processed and β heat-treated alloys because β annealed Ti-6Al-4V has been selected for highly loaded and fatigue-critical structures, including the main wing-carry-through bulkheads and vertical tail stubs, of advanced high-performance military aircraft. An important aspect of the review is a concise survey of fatigue life assessment methods and the required types of fatigue data. This survey provides the background to recommendations for further research, especially on the fatigue behaviour of β annealed Ti-6Al-4V under realistic fatigue load histories, including the essential topic of short/small fatigue crack growth. Such research is required for independent fatigue life assessments that conform to the aircraft manufacturer’s design requirements, and also for life reassessments that most probably will have to be made during the service life of the aircraft.

Author: Attwell M. Adair
Publisher:
ISBN:
Category :
Languages : en
Pages : 70

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The extrusion temperature and cooling rate after extrusion were varied for round to round axisymmetric extrusions of the Beta 111 titanium alloy. The microstructures after extrusion and after heat treatment were examined both by optical and transmission electron microscopy and correlated with the room temperature mechanical properties. Heat treatment following extrusion consisted of either aging only or a solution treatment followed by aging. In contrast to air cooling after extrusion, direct water quenching immediately after extrusion was effective in retaining a significant amount of dislocation structure from the hot deformation, the effect being greater at the lowest extrusion temperature. This retained dislocation structure effectively promoted the formation of alpha during aging and retarded the tendency for the omega phase to form. The effect was greatest when specimens were aged without the intermediate solution treatment. The greater amount and finer distribution of alpha obtained in this manner resulted in significantly higher tensile strengths, quite acceptable values of RA, but with a small loss in fracture toughness. For the extrusion temperature range investigated, the extrusion pressures for the Beta 111 titanium alloy were somewhat lower than for the older, more well established beta titanium alloy. he extrusion pressures for Beta 111 were also lower than for alpha and alpha plus beta titanium alloys, for temperature ranges where they have significant amounts of alpha present. (Author).

Author: D. J. Maykuth
Publisher:
ISBN:
Category : Annealing of metals
Languages : en
Pages : 24

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The report discusses both theory and practice related to the occurrence and elimination of residual stresses in titanium and its alloys. Following a brief section on the general principles of heat treatment of titanium alloys, a description of the origin and effects of residual stresses due to forming, specifically, of the Bauschinger Effect, is presented. Additional data covers residual stresses due to mechanical operations such as grinding, shot peening, grit blasting, vibratory tumbling, and joining. Methods of treatment to eliminate residual stresses are described. (Author).

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 69

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Book Description
Although titanium alloys have been widely used for aerospace applications, they have seldom been used in armor systems. In an effort to provide increased information to armored vehicle designers, the U.S. Army Research Laboratory (ARL) and the U.S. Department of Energy's Albany Research Center (ARC) performed a joint research program to evaluate the effect of thermo-mechanical processing on the ballistic limit velocity for an extra-low interstitial grade of the titanium alloy Ti-6Al-4V. ARC obtained MIL-T-9046J, AB-2 plates from RMI 1 Titanium Company, rolled these plates to final thickness, performed the annealing, and collected mechanical and micro-structural information. ARL then evaluated the plates with 2O-mm fragment- simulating projectiles and l2.7-mm armor-piercing M2 bullets in order to determine the ballistic limit velocity of each plate. Titanium processing and annealing did have an effect on the ballistic limit velocity, but the magnitude of the effect depended on which penetrator was used.

Author:
Publisher: Springer
ISBN: 9789400725256
Category :
Languages : en
Pages : 64

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Author: Matthew S. Burkins
Publisher:
ISBN: 9781423551881
Category :
Languages : en
Pages : 69

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Book Description
Although titanium alloys have been widely used for aerospace applications, they have seldom been used in armor systems. In an effort to provide increased information to armored vehicle designers, the U.S. Army Research Laboratory (ARL) and the U.S. Department of Energy's Albany Research Center (ARC) performed a joint research program to evaluate the effect of thermo-mechanical processing on the ballistic limit velocity for an extra-low interstitial grade of the titanium alloy Ti-6Al-4V. ARC obtained MIL-T-9046J, AB-2 plates from RMI 1 Titanium Company, rolled these plates to final thickness, performed the annealing, and collected mechanical and micro-structural information. ARL then evaluated the plates with 2O-mm fragment- simulating projectiles and l2.7-mm armor-piercing M2 bullets in order to determine the ballistic limit velocity of each plate. Titanium processing and annealing did have an effect on the ballistic limit velocity, but the magnitude of the effect depended on which penetrator was used.