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main rotor blades

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270154
EISBN: 978-1-62708-301-0
... Abstract The aluminum alloy skin on the main rotor blade of a helicopter tore off in flight, and an investigation was subsequently conducted to find the cause. Visual examination and SEM fractography revealed that a fatigue crack originated on the underside of a rivet hole at the trailing edge...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270191
EISBN: 978-1-62708-301-0
...-stage seal land region. In a combined-cycle power plant, during the initial stages of operation, the main rotor developed problems. The compressor part of the rotor had 19 stages and the turbine portion had four stages. The major damage was confined to the area between the 18th and 19th stages...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270107
EISBN: 978-1-62708-301-0
... inner side of the skin, is shown in Fig. CH18.5 . Figure CH18.6 shows a magnified image of this crack. Secondary crack branching from the main crack can also be seen in this figure. In Fig. CH18.5 , another small crack also emanating from the rivet hole can be seen. Fig. CH18.5 Cracks...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870085
EISBN: 978-1-62708-299-0
... Abstract This chapter explains how mechanical processes, including erosion, cavitation, impingement, and fretting, contribute to the effects of corrosion in aluminum alloys. It describes the two main types of erosion-corrosion and the factors involved in cavitation and liquid impingement...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780147
EISBN: 978-1-62708-268-6
... performance at tolerance extremes. Chapter 1 mentions the Apache helicopter main rotor blade failures. McDonnell Douglas Helicopter Company engineers designed the Apache helicopter blade (a bonded stainless steel, carbon fiber, and titanium structure) to withstand a direct hit from high-explosive enemy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000009
EISBN: 978-1-62708-313-3
... Abstract This chapter provides a brief overview of nickel-iron-base, cobalt-base, and nickel-base superalloys, discussing their basic metallurgy and defining characteristics. coefficient of thermal expansion superalloys SUPERALLOYS ARE CLASSIFIED according to the main alloying...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130151
EISBN: 978-1-62708-284-6
..., changing composition or temperature can lead to their precipitation. This means they can form in the ladle, during transport to the mold, or in the mold during solidification. Pinholes and blowholes are the two main kinds of porosity caused by the presence of gas (Ref 8) . Gas porosity...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030117
EISBN: 978-1-62708-282-2
... steam turbines. Cavitation occurs in diesel engine main bearings and wrist pin bearings. Two sources have been identified in diesel bearings ( Ref 22 ) downstream from bearings lubrication grooves and in engines subjected to rapid radial shaft movement. The reference suggests ways to design bearings to...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140021
EISBN: 978-1-62708-335-5
... designs are also differentiated by parting plane orientation. In practice, the dies are mounted on platens that can operate in either vertical or horizontal directions. Early die casting was typically performed with vertical die movement. Today, with exceptions, vertical die casting is restricted to rotor...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140021
EISBN: 978-1-62708-335-5
... casting is restricted to rotor production. Locking pressure defines the capacity of the machine to contain the pressure generated during the injection cycle. The larger the plan area of the casting and the greater the hydraulic pressure applied, the greater the required locking pressure. Die casting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870001
EISBN: 978-1-62708-314-0
... its separate chemical, physical, and mechanical properties. The two constituents are a reinforcement and a matrix. The main advantages of composite materials are their high strength and stiffness, combined with low density, when compared with bulk materials, allowing for a weight reduction in the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040257
EISBN: 978-1-62708-300-3
... similar in properties to conventionally forged parts. Thus, the main advantage of using isothermal forging stems from the differences in the manufacturing costs. The cost of making a forging can be split up into the following categories [ Semiatin et al., 1983 ]: Die material Die machining and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550001
EISBN: 978-1-62708-307-2
... gamma TiAl blades. TiAl is also being considered for both intake and exhaust valve applications for automotive engines ( Fig. 1.14 ). The other main area of interest for the application of TiAl in the automotive sector is as a turbocharger wheel material in diesel engines. Fig. 1.14 Gamma...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610585
EISBN: 978-1-62708-303-4
.... Failure analysis revealed both the compressor rotor and the shaft sustained fatigue failures. Fig. 22 Compressor blade fracture surface showing fatigue origins on low-pressure (i.e., right) side of blade, as indicated by the arrows. Original magnification: 13×. Source: Ref 1 Fig. 23...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220273
EISBN: 978-1-62708-259-4
... also discusses the concepts of hardenability, critical diameter, quench severity, and Jominy testing. annealing carburizing normalizing quenching steel tempering hardenability Jominy testing quench cracking The aim of this chapter is to discuss the main conventional heat treatments...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550511
EISBN: 978-1-62708-307-2
..., and carbides. Table 10.1 Classification of advanced ceramics Main function Properties required Applications (examples) Thermal High-temperature and thermal shock resistance, thermal conductivity (high or low, respectively) High-temperature components, burner nozzles, heat...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270031
EISBN: 978-1-62708-301-0
... ). The technique has been successfully used to monitor the condition of power plant components such as main steam pipe weldments; turbine-generator rotors; steam turbine disks; steam control valves; headers; piping; heat exchangers; and chemical, petrochemical, and nuclear reactor vessels. A test...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610415
EISBN: 978-1-62708-303-4
... and chemical plants and turbine components. Typical materials and application temperatures of some creep-resistant alloys are listed in Table 2 . Often, the main concern is dimensional stability, although prolonged creep will eventually lead to rupture. Table 1 Approximate temperatures for...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.9781627083355
EISBN: 978-1-62708-335-5
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870001
EISBN: 978-1-62708-299-0
... weathering. Low cost, ductile for deep drawing, and easy to weld. Used for high-purity applications such as chemical processing equipment. Also for nameplates, fan blades, flue lining, sheet metal work, spun holloware, and fin stock 1350 Electrical conductors 2011 Screw machine products. Appliance...