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turbine blades

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270138
EISBN: 978-1-62708-301-0
... Abstract A high-pressure turbine blade in an aircraft engine failed prematurely, fracturing close to the root. Visual examination revealed significant plastic deformation on the leading edge of the blade, blocky cleavage on the trailing edge, and a region covered with fissures in between. Based...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270087
EISBN: 978-1-62708-301-0
... Abstract A turbine blade in an aircraft engine failed, fracturing at the root above the fir tree region. Fractography indicated that a fatigue crack initiated at the trailing edge of the blade and the final fracture occurred when the crack reached critical length. Although the exact cause of...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270135
EISBN: 978-1-62708-301-0
... Abstract A second-stage turbine blade in an aircraft engine failed in service, fracturing along a path through the shroud hole. Cracks were also found in the shroud holes of the two adjacent blades. Based on the results of visual examination and SEM fractography, investigators concluded that...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270067
EISBN: 978-1-62708-301-0
... Abstract A low-pressure turbine rotor blade failed in service, causing extensive engine damage. A section of the blade broke off around 25 mm from the root platform, producing a flat fracture surface that appeared smooth on one end and grainy elsewhere. Based on their examination, investigators...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270143
EISBN: 978-1-62708-301-0
... Abstract A low-pressure turbine rotor blade failed during a test run, causing extensive damage to an aircraft engine. Visual examination showed that the nickel-base superalloy blade broke above the root platform in the airfoil section, leaving a fracture surface with two distinct regions, one...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270182
EISBN: 978-1-62708-301-0
... Abstract A turbine in a fertilizer plant began to vibrate and was shut down to investigate the problem. A first stage rotor blade was found fractured and was removed along with several other blades for further examination. Based on their observations and testing, investigators concluded that...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270005
EISBN: 978-1-62708-301-0
... locking mechanisms turbine blades IT IS NOW a well-recognized adage that failures do not just happen; they are caused. There are compelling reasons for investigating failures. Unless the true cause of the failure is discovered, no remedial action is possible to prevent its recurrence. Secondly...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270191
EISBN: 978-1-62708-301-0
... following the failure of the turbine rotor. The damage was maximum in the 18th/19th-stage seal land region of the compressor, with the 19th-stage blades sheared off. Metallurgical investigations were carried out on the roots and airfoil sections of the damaged blades. The blade roots had suffered excessive...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270168
EISBN: 978-1-62708-301-0
..., several components of the turbine disc and fixtures fractured with a loud noise, followed by a fire. The LPT blade locking plate became dislodged due to the shearing of the screws holding it. The dislodgement could be attributed to nonadherence to design drawings and aggravation by the lower strength of...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080249
EISBN: 978-1-62708-304-1
... Industry: Past, Present, and Opportunities for the Future , Surf. Coat. Technol. , Vol 108/109 , 1998 , p 1 10.1016/S0257-8972(98)00642-2 5. Koul A.K. , Immarigeon J.P. , Dainty R.V. , and Patnaik P.C. , Degradation of High Performance Aero-Engine Turbine Blades...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300013
EISBN: 978-1-62708-323-2
... be analyzed based on energy dissipation. It describes the stick-slip behavior observed in wiper blades, the concept of asperities, and the significance of the shape, lay, roughness, and waviness of surfaces in sliding contact. It explains how friction forces are measured and how they are influenced...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280079
EISBN: 978-1-62708-267-9
... external pattern of the desired component (e.g., turbine blade), and then wax fills the die, encapsulating the core with wax. The result is a wax pattern that, at the wax interfaces with the air or the ceramic core, has the form desired for the finished part. Figure 5.2 shows a cast turbine blade with...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000001
EISBN: 978-1-62708-313-3
...-resistant surfaces ( Ref 5 ). By the time the United States had developed its first aircraft GTE in 1943, cobalt-base superalloys had been introduced, and Haynes Stellite 21 (a cast alloy intended primarily for dental implants) was chosen as the very first turbine blade material. Most of the early...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280011
EISBN: 978-1-62708-267-9
... gas turbines, especially as airfoils, that is, blades and vanes. Most castings are polycrystalline (PC) equiaxed, but others are directionally solidified (DS). The PC castings contain many grains that may vary in size from one component to another. Directionally solidified castings may have a...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280117
EISBN: 978-1-62708-267-9
... component on the GTCP 331 auxiliary power unit (APU) engine had accumulated more than 12 million cycles without failure. Based on this experience, other turbine applications have either been introduced or are being designed and certified. Nearly 10,000 as-HIP turbine disks with integral or inserted blades...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280091
EISBN: 978-1-62708-267-9
... gas turbine disks and, in some instances, as forged blades in gas turbines. Cast cobalt alloys still maintained an edge for certain applications, but wrought-processed precipitation-hardened superalloys were in great demand, and still are, for a variety of gas turbine applications. A knowledge of the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460277
EISBN: 978-1-62708-285-3
... Turbines by Cold Gas Dynamic Spraying and Its Durability Evaluation ,” Ph.D. thesis, Tohoku University, Japan, March 2009 11.30 Ogawa K. and Seo D. , Chap. 21, Repair of Turbine Blades Using Cold Spray Technique , Advances in Gas Turbine Technology , Benini E. , Ed., InTech...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080005
EISBN: 978-1-62708-304-1
... Abstract Many metallic components, such as retorts in heat treat furnaces, furnace heater tubes and coils in chemical and petrochemical plants, waterwalls and reheater tubes in boilers, and combustors and transition ducts in gas turbines, are subject to oxidation. This chapter explains how...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280323
EISBN: 978-1-62708-267-9
... turbine applications generally are exposed to the most demanding combinations of high temperature and stress. Wrought alloys have been used in the past for turbine blades and vanes in aircraft gas turbines. The approximate metal temperature range for airfoils of such alloys, when used, was about 1340 to...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280339
EISBN: 978-1-62708-267-9
... , however, groups all superalloys considered into a single chart. Fig. 15.1 Temperature-strength capability of selected superalloys as a function of year of availability (about 1945–1970). (a) Compressor and turbine disks, (b) burner cans and combustors, (c) turbine vanes, and (d) turbine blades...