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alpha-beta titanium alloys

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001782
EISBN: 978-1-62708-241-9
... are very sensitive to surface damage, as a dramatic reduction in fatigue properties can result if conventional machining operations are not carefully controlled. In addition, when welding alphabeta titanium alloys, shielding atmospheres are required to inhibit weld contamination and the development...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001667
EISBN: 978-1-62708-235-8
... and is a strengthener in alpha titanium alloys (unalloyed titanium), but too much oxygen causes embrittlement of the alpha phase. The presence of an alpha case in an alpha-beta titanium alloy, such as Ti-6Al-4V, can cause a reduction in the mechanical properties of the material [ 1 ]. The potential absorption of oxygen...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001801
EISBN: 978-1-62708-241-9
.... orthopedic fixation device fracture surface damage titanium alloy notches roughness metallography fatigue crack growth rates ASTM F136 (alpha-beta titanium alloy) UNS R56401 Introduction Investigation Discussion Conclusions References References 1. http://www.scoliosis.org...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001660
EISBN: 978-1-62708-236-5
... band formation owing to their high strength and low thermal conductivity [ 3 ]. It has been reported that shear band formation in Ti-6Al-4V alpha-beta alloys is extremely temperature dependent [ 4 ]. Below 704 C (1300 F) plastic deformation is highly localized (forming shear bands); while above...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001649
EISBN: 978-1-62708-234-1
... in the observed fracture topography was not present. Fig. 9 Micrograph of the failed right-hand bolt microstructure (Kroll's Reagent; 350× magnification at 6.6 in. width). The duplex microstructure consists of elongated alpha (light) in a beta (dark) matrix. Microhardness measurements were taken...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
... the composition as well as the properties of the surface layer. The alpha case in titanium (oxygen contamination) becomes very brittle and can act as a damage-initiation site ( Fig. 24 ). Fig. 24 (a) Etched Waspaloy superalloy. (b) Ti-6Al-4V with alpha case. 2% HF etch Austenitic stainless steels...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001558
EISBN: 978-1-62708-217-4
... observations. The valve body was produced from Ti-5Al-2.5Sn ELI (extra low interstitial) and had 0.095% oxygen and 21 ppm hydrogen (by weight), and conformed to the specified composition limits. The material was cross-forged at a starting temperature of 1227 K, which is in the middle of the alpha-beta two...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... on fracture path Effects on fracture mechanics properties Phase morphology in α-β titanium alloys Change from α and β grains to α in β Crack branching and irregularity greatly increased Higher K Ic and K Issc Increased resistance to fatigue crack growth Large particles in steels...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... analysis, alloy selection, improper mechanical/thermal processing, improper assembly, and failure to accommodate an adverse operating environment. Fractography provides a unique tool to determine potential causal factors, such as: Whether a material was used above its design stress Whether...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... is relatively free from those inclusions that may cause unwanted discontinuities. Air-melted alloys commonly contain inclusions. Vacuum- or electroslag-remelted alloys more commonly contain nonmetallic inclusions, such as titanium carbonitrides or carbides, when carbon or the hardening element form precipitate...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003514
EISBN: 978-1-62708-180-1
...) Nonsymmetric Bounded to the left (cannot be negative) Applications: life and time between failures of electronic components and systems; fatigue (initial crack size) Beta Beta Two parameters and two bounds May be symmetric or nonsymmetric, depending on parameters Bounded on both sides...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... R. , “ Bismuth—Its Effect on the Hot-Working and Cold-Working Properties of Alpha and Alpha-Beta Brasses ,” Technical Publication 1441, American Institute of Mining and Metallurgical Engineers , 1942 12. Chen L.-C. and Shewmon P. , Metall. Mater. Trans. A , Vol 26 , p 2317...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785
EISBN: 978-1-62708-295-2
... caustic solutions High-nickel alloys High-purity steam Alpha brass Ammoniacal solutions, chloramine, amine Aluminum alloys Aqueous chloride, bromide, and iodide solutions Titanium alloys Aqueous chloride, bromide, and iodide solutions; organic liquids; N 2 O 4 Magnesium alloys Aqueous...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... analysis, metallographic analysis, and simulated-service tests. It provides case studies for the analysis of SCC service failures and their occurrence in steels, stainless steels, and commercial alloys of aluminum, copper, magnesium, and titanium. aluminum alloys austenitic stainless steel carbon...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001573
EISBN: 978-1-62708-226-6
... the microarcing. Arcing Pitting (wear) Surgical implants Wire Ti-6Al-4V Titanium nitride coating UNS R56406 Surface treatment related failures (Other, miscellaneous, or unspecified) wear Background Observations and Results Discussion And Conclusion Selected Reference Selected...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001690
EISBN: 978-1-62708-226-6
... of Titanium and Titanium Alloys , ASM International . 9th ed. , vol.13 , 1987 , pp. 669 – 706 . 29. Castleman L.S. , Motzkin S.M. , Alicandri F.P. , and Bonawit V.L. : J. Biomed. Mater. Res. , 1976 , vol. 10 , pp. 695 – 731 . 30. Duerig T. , Pelton...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047681
EISBN: 978-1-62708-229-7
...Abstract Abstract A fluorescent liquid-penetrant inspection of an experimental stator vane of a first-stage axial compressor revealed the presence of a longitudinal crack over 50 mm (2 in.) long at the edge of a resistance seam weld. The vane was made of titanium alloy Ti-6Al-4V (AMS 4911...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047641
EISBN: 978-1-62708-235-8
... of the segmented backup ring was provided, and a fine-mesh stainless steel screen diffuser was incorporated in the channel section of the backup ring to prevent air from leaking in. A titanium alloy color chart was furnished to permit correlation of weld-zone discoloration with the degree of atmospheric...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091726
EISBN: 978-1-62708-217-4
...Abstract Abstract In January 1965, a Reaction Control System (RCS) pressure vessel (titanium alloy Ti-6Al-4V) on an Apollo spacecraft cracked in six adjacent locations. It used N2O4 for vehicle attitude control through roll, pitch, and yaw engines, and was protected from the N2O4 by a Teflon...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091727
EISBN: 978-1-62708-217-4
...Abstract Abstract During an acceptance test of the Apollo spacecraft 101 service module prior to delivery, an SPS fuel pressure vessel (SN054) (titanium Ti-6Al-4V, approximately 1.2 m (4 ft) in diam and 3 m (10 ft) long) containing methanol developed cracks adjacent to the welds. The test...