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thermomechanical treatments

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047199
EISBN: 978-1-62708-234-1
... materials (referred to here as materials 1, 2, and 3). Specifically, the factors investigated were the grain structures developed by thermomechanical treatments, thermal treatment, and the quenching rate subsequent to the solution heat treatments. Effect of Grain Structure A section through a forging...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091761
EISBN: 978-1-62708-229-7
... and temperatures, the shroud tip fractured due to thermomechanical fatigue in its degraded state. Recommendations included special chromium or silicon-rich coating to minimize corrosion in gas turbines operating in a marine environment with operating temperatures in the range of type 2 corrosion (650 to 750 deg C...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001265
EISBN: 978-1-62708-215-0
... the compositional, microstructural, and mechanical properties of TI-6Al-4V used in implant devices. Microstructurally, these specifications suggest that the alloy be used in the bimodal form obtained by thermomechanical treatment in the α + β phase field. According to these specifications, no coarse α platelets...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
... records that the ring had been removed for hydrotest and welded without any postweld heat treatment. The final cause of failure was concluded to be cracking that developed during the installation of the new shroud ring. Stress-relief heat treatments were recommended to be performed to reduce residual...
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
... an impact on SCC susceptibility. When selecting a material resistant to SCC, it is important not only to understand its bulk chemical composition and observable microstructural constituents but also to consider the processing (e.g., thermomechanical history) of the material and the levels of chemical...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001305
EISBN: 978-1-62708-215-0
... site. Fracture surface in the flange is typical of fatigue Metallography Microstructural Analysis Metallographic examination of a sample cut from the wheel rim indicated that the structure was tempered martensite with a few small patches of ferrite. The wheel thus met the heat treatment...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001819
EISBN: 978-1-62708-241-9
..., and lower cost when compared with austenitic stainless steels. On the other hand, DSSs have some disadvantages, such as difficult thermomechanical processing and low resistance to pitting corrosion [ 2 ]. In order to meet the typical requirements for toughness, strength, and corrosion resistance, phases...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003521
EISBN: 978-1-62708-180-1
... is not necessarily complete because it does not point to the specific environment that results in a fatigue damage mode. Instead, specific mechanisms that can result in a fatigue damage mode have to be examined. Examples include corrosion fatigue, thermomechanical fatigue, creep-fatigue interaction, and mechanical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001543
EISBN: 978-1-62708-218-1
... evidence of softening. When two of the pistons were reheat treated and aged at 310 to 340 F, the resulting hardness (R E 92 to 99) proved that the alloy responded properly to heat treatment. Thus, severe in-service heating during the 500 mile race had overaged the alloy appreciably. Radiography...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001609
EISBN: 978-1-62708-229-7
..., and the weld had received a postweld heat treatment (PWHT). Metallographic examination revealed that the corroded areas contained undertempered martensite. Fully tempered weld areas with a hardness of 93 HRB were not attacked. No evidence of corrosion fatigue was found. Uneven temperature control during PWHT...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006756
EISBN: 978-1-62708-295-2
... mechanisms that can result in a fatigue damage mode must be examined. Examples include corrosion fatigue, thermomechanical fatigue, vibrationally induced fatigue, creep-fatigue interaction, and fatigue induced only by mechanical cyclic stresses. Determination of damage mechanisms starts by characterizing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001603
EISBN: 978-1-62708-228-0
..., and welding from the following sources: entrapment of slag inclusion oxide entrapment during Ca-Si treatment exogenous inclusion entrapment during welding It was confirmed that the steel was not subjected to Ca-Si treatment, and the presence of Ca rules out the possibility of inclusion...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... to creep behavior and associated failures of alloys used in high-temperature applications. The complex effects of creep-fatigue interaction are also discussed, although more detail on this is described in the article “Thermomechanical Fatigue: Mechanisms and Practical Life Analysis” in this Volume. Life...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001636
EISBN: 978-1-62708-217-4
... (SEM). The Failure Analysis Topics Table 1 The Failure Analysis Topics Hub Manufacture Thermomechanical processing and heat treatment Metallurgical defects Microstructural factors influencing fatigue Chemical composition Finishing Stress relief anneal Final machining...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
... be prevented by eliminating the bolt hole, using a different type of bolt, or adjusting the fastening torque. cylinder head overload failure overtorquing cast aluminum alloy casting pores metallurgical analysis thermomechanical fatigue strength EN 46200 (aluminum alloy AlSi8Cu3) Introduction...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... and heat treatment. In heat treatable alloys, variations in composition can produce unexpected responses to heat treatments, which result in hard or soft spots, quench cracks, or other flaws. Excessive segregation that leads to significant variations in hardness can lead to premature failure and extreme...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
..., are thermal-metallurgical phenomena related to alloy-specific phase transformations and local stress-strain behavior controlled by thermomechanical conditions. Process modeling and simulation are important tools to evaluate thermomechanical and metallurgical conditions ( Ref 34 ). Early AM modeling research...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... in high-temperature applications. The complex effects of creep-fatigue interaction are also discussed, although more detail on this is described in the article “Thermomechanical Fatigue: Mechanisms and Practical Life Analysis” in this Volume. Life assessment is also covered in the article “Elevated...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001848
EISBN: 978-1-62708-241-9
... ). These trapped gases not only expel the piece at the end of forging and prevent sticking, but they also increase the forging load and increase wear and delamination of surface by a thermomechanical fatigue process ( Fig. 5 ). After a forging hit, the lubricant develops the “diesel effect,” expands, and ignites...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... of a structure is dependent on many variables. The most important influences are material type, material strength and toughness, component size, surface finish, surface treatment, notch effect, mean stress, and environmental influences. A typical equation to determine the fatigue strength (nominal stress...