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Viewing 1 to 30 of 1152
2014-04-28
Technical Paper
2014-28-0024
Swapnil Pawar, Sandip Patil, Suhas Joshi, Rajkumar Singh
Abstract Tapping is an important process in assembly of aircraft structures because on an average one millions of tapped holes are made on an aircraft structure. However, sudden breakage of the tap is the most undesirable event frequently encountered during the tapping process. In particular, this can mostly occur when small diameter internal threads are made in a ‘difficult-to-cut’ material like titanium. For this reason, it has been a topic of industrial interest in the manufacturing sector for many years. The ultrasonic vibrations assisted tapping (UVAT) is a novel manufacturing technology, where ultrasonic vibrations are provided to the work piece in the axial direction. The present work is a comprehensive study involving experimental characterization. The experimentation shows that UVAT reduces the torque during tapping as compared to that of in conventional process. There is a 19.1% reduction in torque and about 20.3% reduction in cutting temperature in UVAT over that of in CT.
2014-08-01
Magazine
3-D manufacturing of titanium components takes off MRO providers are discovering ways to innovate their procedures while remaining viable and profitable through the current downturn in government spending. Commercial programs are flying high With economic regeneration underway this year, the rate of ordering new aircraft has been at an all-time high, with the result that backlogs for undelivered new production stretch well into the next decade for some popular models.
2015-01-01
Book
F H Froes
This new book covers all aspects of the history, physical metallurgy, corrosion behavior, cost factors and current and potential uses of titanium. The history of titanium is traced from its early beginnings through the work of Kroll, to the present day broadening market place. Extensive detail on extraction processes is discussed, as well as the various Beta to Alpha transformations and details of the powder metallurgy techniques. The relationship of microstructure to mechanical properties, and the topic of corrosion are described in detail. A comprehensive section presents applications of titanium. Anyone involved in any aspect of titanium science, technology, or application (including personnel in industry, government, and academia) can benefit from this book.
CURRENT
2011-06-23
Standard
AMS4964B
This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings, and stock for forging or flash welded ring.
HISTORICAL
2008-01-03
Standard
AMS4963B
This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings, and stock for forging, flash welded rings, or heading.
HISTORICAL
2003-03-14
Standard
AMS4963A
This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings, and stock for forging, flash welded rings, or heading.
CURRENT
2016-12-06
Standard
AMS4962B
This specification covers a premium grade titanium alloy in the form of investment castings.
HISTORICAL
1995-09-01
Standard
AMS4963
This specification covera a titanium alloy in the form of bars, wire, forgings, flash welded rings, and stock for forging, flash welded rings, or heading. These products have been used typically for parts to be rough machined prior to solution and precipitation heat treatment and for parts requiring high strength-to-weight ratios at or near room temperature, but usage is not limited to such applications. Certain processing procedures and service conditions may cause these products to become subject to stress-corrosion cracking; ARP983 recommends practices to minimize such conditions.
HISTORICAL
2005-08-29
Standard
AMS4964A
This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings, and stock for forging or flash welded ring.
HISTORICAL
2000-07-01
Standard
AMS4964
This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings, and stock for forging or flash welded ring.
CURRENT
2016-08-01
Standard
AMS4963D
This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings up through 3.999 inches (101.57 mm), inclusive and stock for forging, flash welded rings, or heading.
HISTORICAL
2012-08-17
Standard
AMS4963C
This specification covers a titanium alloy in the form of bars, wire, forgings, flash welded rings, and stock for forging, flash welded rings, or heading.
HISTORICAL
1992-07-01
Standard
AMS4994
This specification covers powdered metal products consolidated by hot isostatic pressing (HIP) of titanium alloy powder compacts.
CURRENT
2006-03-10
Standard
AMS4994A
This specification covers powdered metal products consolidated by hot isostatic pressing (HIP) of titanium alloy powder compacts.
2017-04-26
WIP Standard
AMS4988D
This specification covers a titanium alloy in the form of sheet, strip, and plate in thicknesses up through 4.000 inches (101.60 mm).
CURRENT
2014-03-07
Standard
AMS4988C
This specification covers a titanium alloy in the form of sheet, strip, and plate in thicknesses up through 4.000 inches (101.60 mm), inclusive (See 8.7).
HISTORICAL
2008-01-03
Standard
AMS4988A
This specification covers a titanium alloy in the form of sheet, strip, and plate.
HISTORICAL
2013-02-07
Standard
AMS4988B
This specification covers a titanium alloy in the form of sheet, strip, and plate in thicknesses up through 4.000 inches (101.60 mm).
HISTORICAL
2003-04-17
Standard
AMS4988
This specification covers a titanium alloy in the form of sheet, strip, and plate. This material has been used typically for parts to be formed or machined in the solution heat treated condition and subsequently precipitation heat treated requiring high strength-to-weight ratio and stability up to 550 degrees F (288 degrees C) in the precipitation heat treated condition, but usage is not limited to such applications. Certain processing procedures and service conditions may cause these products to become subject to stress-corrosion cracking; SAE ARP 982 recommends practices to minimize such conditions.
HISTORICAL
2001-11-20
Standard
AMS4898A
This specification covers a titanium alloy in the form of sheet. This sheet has been used typically for parts requiring high strength, toughness, and fatigue strength up to 750 degrees F (399 degrees C), but usage is not limited to such applications. The product an be super-plastically formed above 1500 degrees F (816 degrees C) and it can be aged after air cooling from the solution treatment or super-plastic forming temperature to increase the strength. Certain processing procedures and service conditions may cause this sheet to become subject to stress-corrosion cracking; ARP982 recommends practices to minimize surch conditions.
HISTORICAL
2008-12-19
Standard
AMS4898C
This specification covers a titanium alloy in the form of sheet.
HISTORICAL
1996-09-01
Standard
AMS4898
This specification covers a titanium alloy in the form of sheet.
2017-04-04
WIP Standard
AMS4898E
This specification covers a titanium alloy in the form of sheet in nominal thicknesses 0.016 through 0.1874 inch (0.41 through 4.760 mm).
HISTORICAL
2007-05-15
Standard
AMS4898B
This specification covers a titanium alloy in the form of sheet.
CURRENT
2014-01-16
Standard
AMS4898D
This specification covers a titanium alloy in the form of sheet in nominal thicknesses 0.016 through 0.1874 inch (0.41 through 4.760 mm).
HISTORICAL
2003-01-07
Standard
AMS4899A
This specification covers a titanium alloy in the form of sheet, strip, and plate.
HISTORICAL
1996-04-01
Standard
AMS4899
This specification covers a titanium alloy in the form of sheet, strip, and plate. These products have been used typically for parts requiring high fracture toughness, fatigue strength, formability, and strenth up to 480 degrees F (249 degrees C), but usage is not limited to such applications. The alloy is superplastic below 1520 degrees F (827 degrees C) and hot formable from 1200 to 1560 degrees F (649 to 849 degrees C).
HISTORICAL
2011-09-13
Standard
AMS4899C
This specification covers a titanium alloy in the form of sheet, strip, and plate.
Viewing 1 to 30 of 1152

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