AMPP Store - Products tagged with 'fatigue'

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Fatigue Crack Initiation In Zr-2.5Nb Tested In Heavy-Water At 300°C

Product Number: ED22-17233-SG

Author: H.M. Nordin, A.J. Phillion, Q. Wang, M. Lenzi, H.Yu, T.M. Karlsen

Publication Date: 2022

$20.00

Pressure tubes, manufactured from Zr-2.5Nb, are used within a CANDU power reactor to contain the fuel bundles and coolant forming the primary pressure boundary in the core with an expected operating lifetime of 25 years. As part of the Canadian Standards Association (CSA) fitness-for-service requirements for pressure tubes, flaws or stress risers that potentially lead to cracks cannot exist in pressure tubes in operating reactors. Flaws may include: fuel bundle scratches, crevice corrosion marks, fuel bundle bearing pad fretting flaws and debris fretting flaws.

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Fatigue Properties of Zirconium and Zirconium Alloys and their Application in Design and FFS

Product Number: 51323-19188-SG

Author: Nathaniel G. Sutton, Phillip E. Prueter

Publication Date: 2023

$20.00

Zirconium and Zirconium alloys have been used successfully in a range of corrosive environments, both as base materials and as cladding on other backing materials. Zirconium is used extensively as fuel-rod “cladding” in nuclear reactors. In the chemical process industries, Zirconium and its alloys are used in urea production, acetic acid and vinyl acetate production, and various sulfuric, hydrochloric, and organic acid services.

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Fusion Bonded Joint: A Fatigue Friendly Connector for Cost Efficient Plastic Lined Pipe Installation and Operation

Product Number: MPWT19-14415

Author: François LIROLA

Publication Date: 2019

$0.00

This paper presents the features of the Fusion Bonded Joint sleeve and addresses its design, manufacturing, and the outcomes of the comprehensive physical testing campaign that was performed. The summary of the tests that were carried out begin from the proof of concept phase to the integrated system tests, covering both carbon steel and High-Density PolyEthylene components assembled under conditions representative of its offshore operating conditions.The present paper covers preliminary manufacturing testing phase, electro-fusion welds qualification along with the required equipment and finally full-scale testing demonstrating the sleeve is compatible with standard welding processes. An in-depth analysis of the conditions and results of the fatigue testing campaign specifics, covering both carbon steel and electro-fusion welds dynamic behavior is proposed.

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Investigating the Application of the Effective Area Approach to Estimating Fatigue Life

Product Number: 51324-21053-SG

Author: Zach Booth; Ben Hanna; Steven J Polasik

Publication Date: 2024

$40.00

Fitness-for-service assessments of corrosion flaws in line pipe often use an Effective Area Method approach (e.g., RSTRENG) to estimate criticality. This method evaluates all contiguous combinations of flaw dimensions that can be defined via a detailed profile. The lowest burst pressure of those combinations is considered the estimated burst pressure of the flaw. This paper investigates the use of an effective area approach to estimate the remaining fatigue life of crack-like flaws described by a detailed profile. Using flaws reported from in-line inspection, the burst pressure and fatigue life of all combinations of flaw dimensions were estimated using the CorLAS™ fracture mechanics model. For some profiles, the effective area corresponding to the lowest burst pressure is not the same as the effective area corresponding to the lowest fatigue life. Therefore, additional analyses of flaws with detailed profiles may be warranted when developing remediation plans considering both fatigue life and burst pressure.

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Monitoring Rebar Corrosion Propagation Embedded in Concrete

Product Number: 51317--9094-SG

ISBN: 9094 2017 CP

Author: Francisco Presuel-Moreno

Publication Date: 2017

$20.00

As a means to assess achieving intended service life on marine exposed bridge structures, corrosion of steel reinforcement was monitored on selected laboratory specimens for several years and on other specimens for a few months.

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Specifying Corrosion Protection for the Offshore Wind Turbine Industry

Product Number: 51317--9091-SG

ISBN: 9091 2017 CP

Author: Birit Buhr Jensen

Publication Date: 2017

$20.00

Specifying corrosion protection for the offshore wind turbine industry in the European CEN TC219(2) committee. This comprises corrosion protection specification for external as well as internal parts of the turbine foundations.

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The Optimized Inspection Approaches of PSA Adsorber Weldment Integrity with the Buried Cracks

Product Number: 51324-20689-SG

Author: Seokmin Kim; Yunjo Ro; Dongsik Lee

Publication Date: 2024

$40.00

The weldments in PSA adsorbers have been examined by several non-destructive examination (NDE) methods, and then the metallurgical examinations were followed by NDE to confirm the nature of defects. Time of flight diffraction (TOFD), manual ultrasonic testing (UT), and phased array ultrasonic testing (PAUT) were employed to determine the location and size of defects inside of the weldments. Then, many crack-like defects were found in the weldments, and all of them were transverse defects with various sizes and orientations. To understand the nature of crack-like defects, we destructively examined the defects using the metallurgical characterization tools. The defects were found to be in two types: a chevron(1) and a vertical transverse crack. It has been conjectured that the chevron crack was caused by hydrogen during the welding process. And the vertical transverse crack was originated from the small defect that occurred in the weldment during the manufacturing of the vessel. In response to the occurrence of these defects, the effectiveness of manufacturing and in-service inspections was evaluated, and an inspection strategy for aged and future PSA adsorbers has been established. The details of NDE and metallurgical studies and the newly established inspection policy will be discussed in the proceedings.

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ulti-Axial Fatigue Initiation Testing and Specimen Characterization of 304 Stainless Steel

Product Number: ED22-18372-SG

Author: Eleanor M Grieveson, Peter Gill, Paul Onwuarolu, Ben Coult, Alistair Garner

Publication Date: 2022

$20.00

Current fatigue assessments for the fatigue life of a plant component are usually based on methodologies that use uniaxial fatigue test data (i.e. ASME Section III, and are intended to be conservative for design and fitness-for-purpose assessments when applied to plant components and loading. This data is generated through cyclic loading of specimens at a constant amplitude, and failure is usually defined as when there is a load drop of 25% from steady state stress under strain-controlled conditions (or specimen separation for stress control). The corresponding number of cycles is then used as the definition of fatigue life for a particular strain amplitude. It is known that there are differences between fatigue behaviour in an idealised laboratory setting and in-service components which can contribute to excessive conservatism in plant assessments.

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Understanding the Influence of Surface Condition on the Fatigue and Corrosion Fatigue Behavior of SLM718

Product Number: 51324-21234-SG

Author: Helmuth Sarmiento Klapper; Nils Holzapfel; Wei Chen; Juan Carlos Flores

Publication Date: 2024

$40.00

Selective laser melting (SLM) is a widely used additive manufacturing (AM) process, also for producing components using precipitation-hardenable nickel alloy 718 (UNS N07718). SLM has been largely accepted into many industries including oil and gas (O&G) with current research efforts focused on demonstrating materials performance in demanding applications including directional drilling and reservoir characterization tools. A broader applicability of additively manufactured UNS N07718 in such applications is currently conditioned by characterization efforts limited to corrosion testing on machined surfaces, which are not representative of the surface resulting from SLM process. The lack of understanding regarding the influence of as-printed surface conditions for UNS N07718 produced via SLM on fatigue and corrosion fatigue limits its applicability to the machined surface condition, thus negating benefits gained during the manufacturing process. In this research work, the fatigue and corrosion fatigue behavior of additively manufactured UNS N07718 in as-printed conditions was investigated. Besides fatigue in air at ambient temperature, corrosion fatigue of SLM718 was tested in alkaline 5 M chloride-containing brines at 125 °C to simulate a typical drilling environment. Experimental results have shown that as-printed surfaces of SLM718 are significantly more prone to fatigue and corrosion fatigue compared to machined surfaces. Besides increased surface roughness the presence of near-surface defects typical of AM can be seen as the reason for the observed fatigue behavior.

Products tagged with 'fatigue'

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