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accelerated aging

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001674
EISBN: 978-1-62708-234-1
...Abstract Abstract Accelerated aging tests on detonator assemblies, to verify the compatibility of gold bridgewire and Pd-In-Sn solder with the intended explosives, revealed an unusual form of corrosion. The tests, conducted at 74 deg C (165 deg F) and 54 deg C (130 deg F), indicated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006406
EISBN: 978-1-62708-217-4
... corrosion and fatigue. The cracking was accelerated because of an inadvertent fit up stress during installation. The age of the crack could not be established. However, a reevaluation of prior x-ray inspections in this area would result in some close estimate of the age of the crack. End grain exposure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001451
EISBN: 978-1-62708-224-2
... was there any indication of a pre-existing crack or major discontinuity at the point of origin. A sulfur print suggested the hook had been forged from a billet cogged down from an ingot of semi-killed steel. Failure of this hook was attributed to strain-age embrittlement of the material at the surface...
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
... is promoted by crazing of the protective oxide film. It was learned that minor changes in the testing procedures could inhibit or accelerate the reaction. Recommendations included replacing the methanol with a suitable alternate fluid. Isopropyl alcohol was chosen after considerable testing. This incident...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001738
EISBN: 978-1-62708-220-4
... materials is usually lower than for new materials. In the accelerated creep tests on the aged material it was observed that the tertiary creep regime starts at 7% elongation. This observation has been made earlier 8 . From the damage case in 1977 it is known that 20% diametrical expansion occurred without...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
... is followed by fracture. Tertiary creep occurs when reduction in cross-sectional area resulting from cracking, necking, or both accelerates the creep rate. Environmental conditions that decrease the cross-sectional area may also increase the rate. Tertiary creep may also result from metallurgical changes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001616
EISBN: 978-1-62708-229-7
... sites for local pitting bursting. Nonuniform heat transfer in Stage 3 operation accelerated the selective corrosion of front-end tubes. The relatively high heat transfer in this stage resulted in condensation of some corrosive gases and consequent corrosion. Continuous operation of the plant with some...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001727
EISBN: 978-1-62708-225-9
... for a Titan vehicle failed at Cape Kennedy ( Fig. 2 ). They were made of 17-4 PH in the H900 condition — a martensitic, age-hardening alloy. In the H900 condition (solution treated and aged 1 hr at 900 F), the material had nominal strengths of 180,000 psi yield and 200,000 psi tensile. The alloy's composition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001590
EISBN: 978-1-62708-228-0
..., the crack contains a metallic filament enclosed by a chromium-rich layer. The crack zone is usually hard (Vickers Hardness > 200 Hv). The hardness increase is attributed to intermediate temperature-aging reactions that are often accelerated by prior cold work. Alloys containing the age hardening...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001455
EISBN: 978-1-62708-234-1
... to an accelerated salt spray test also suffered from this form of corrosion. Ageing for 28 hours, however, reduced the amount of the attack considerably, while a 72-hour treatment served to eliminate it; it was also apparent that the sample having the lower copper content required a longer ageing treatment...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
... the microstructure of the cutting tool itself can accelerate wear. For example, if the cutting tool has a hard surface coating, wear accelerates after the coating wears or separates to expose the underlying softer core to excessive temperature, oxidation, melting, and concomitant wear ( Ref 3 ). Refinement...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047636
EISBN: 978-1-62708-217-4
... to determine cause of failure. In one, the threaded boss had separated from the elbow at the weld. In the other, the failure was by fracture of the elbow near the flange. The separation of the threaded boss from the elbow was due to a poor welding procedure. Crack propagation was accelerated by fatigue caused...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006794
EISBN: 978-1-62708-295-2
.... , Dutta I. , Sarihan V. , Frear D.R. , and Renavikar M. , Effects of Strain Rate and Aging on Deformation and Fracture of Sn-Ag-Cu Solder Joints , 11th Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems , IEEE , 2008 , 10.1109/ITHERM...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006807
EISBN: 978-1-62708-329-4
..., leading to a synergistic effect. These include thermally activated microstructural changes or aging that occurs in metallic materials in the same temperature range where creep is a concern. This article is aimed at providing an overview of the damage mechanisms of concern, with a focus on creep...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001594
EISBN: 978-1-62708-229-7
... needed to characterize the vibration includes its intensity (amplitude/acceleration), frequency, and whether it manifests as bending loads or pressure pulsation. An inspection program should be modified as the plant ages because components wear and there is a tendency for vibration levels to increase...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001022
EISBN: 978-1-62708-214-3
... and adjoining wall between the steel sleeve and the steel diaphragm washer. Metallographic analysis and accelerated corrosion tests showed that the cracks had originated as stress-corrosion failures. Forgings, corrosion Landing gear, corrosion 2014 UNS A92014 Intergranular corrosion Stress-corrosion...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... and metal dusting, sulfidation, hot corrosion, chloridation, hydrogen interactions, molten metals, molten salts, and aging reactions including sensitization, stress-corrosion cracking, and corrosion fatigue. It concludes with a discussion on various protective coatings, such as aluminide coatings, overlay...
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
... in shipboard service were replaced with retainers made to the improved design using alloy C64700. The parts were blanked and formed in the solution, heat treated and 37% cold-reduced tempered, aged after forming, and then shot blasted. Over a period of several years, only a few isolated SCC failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001632
EISBN: 978-1-62708-234-1
... S.A. , Sommer W.F. , Brown R.D. , Roberts J.E. , Eddleman J. , Zimmermann E. , and Willcutt G. : “Progress Report on the Accelerator Production of Tritium Materials Irradiation Program” , Materials for Spallation Neutron Sources , Wechsler M.S. , Mansur L.K...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001813
EISBN: 978-1-62708-241-9
.... , Mayorga A. : Evaluation of Aging Equipment for Continued Service, Corrosion 2005, Paper 05558 . NACE International , Houston, USA ( 2005 ) 10.1016/j.tree.2005.04.002 Selected references Selected references • King R.T. , Failures of Pressure Vessels , Failure Analysis...