Determination of residual stresses in materials and industrial components by neutron diffraction

Albertini, G.; Bruno, Giovanni; Carradò, Adele; Fiori, F.; Rogante, Massimo; Rustichelli, F.

doi:10.1088/0957-0233/10/3/006

Cited by 27 publications

(13 citation statements)

References 24 publications

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“…The fabrication and external load make it possible to introduce the residual stress into the mechanism. 26,27 Furthermore, the residual stress increases the risk of mechanical failure and fatigue deformation, which affects the linearity characteristics in the displacement/ force transmission for a compliance mechanism. However, both the experimental and simulation results verify the robustness of the design of the flexure-based leverage mechanism.…”

Section: Linearity Characteristicsmentioning

confidence: 99%

Force transmission of flexure-based leverage mechanism for static unbalance measuring system under self-gravity effect

Wang

Liu

Guan

et al. 2017

Advances in Mechanical Engineering

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This article proposes a flexure-based leverage mechanism that improves the performance of the static unbalance measurement system in terms of sensitivity and precision. The primary function of the flexure-based leverage mechanism is to transform the objective unbalance force/moment from the double-frame platform to an electromagnetic force balance sensor. A model of the flexure-based leverage mechanism was established to investigate the displacement/force amplification based on the elastic model. The finite element method was used to verify the analytical solutions. Considering the gravity effects, the self-weight of the rigid bodies in this leverage mechanism has an effect on the reading in the sensors. However, the linearity characteristics are not sensitive to the self-weight of the proposed leverage mechanism and the stiffness of the flexure hinges. Virtual experiments conducted to verify the linearity and sensitivity of the system indicated that depending on the leverage function of the flexure-based leverage mechanism, the systematic sensitivity is less than 0.02 g/(g cm), the resolution is 0.0013 g cm, and the maximum linearity error is 2.7%.

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Section: Linearity Characteristicsmentioning

confidence: 99%

Force transmission of flexure-based leverage mechanism for static unbalance measuring system under self-gravity effect

Wang

Liu

Guan

et al. 2017

Advances in Mechanical Engineering

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“…This load transfer from matrix to reinforcements was caused by the significant difference between the elastic modulus of the two phases. The neutron diffraction technique is also used more and more in load partitioning and internal stress measurement in different kinds of composite materials, primarily due to its greater penetration of the testing materials [47][48][49][50][51]. Other resulting advantages of neutron diffraction include: the ability to study systems containing heavy elements and/or large diameter fibers or particles; the ability to study and separate subsurface micro-and macrostress gradients; and the ability to achieve bulk volume averaging in samples such as tensile test specimens.…”

Section: Strengthening Mechanisms Of MMCmentioning

confidence: 99%

The Microstructure-Processing-Property Relationships in an Al Matrix Composite System Reinforced by Al-Cu-Fe Alloy Particles

Tang

2004

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Tang, Fei, "The microstructure-processing-property relationships in an Al matrix composite system reinforced by Al-Cu-Fe alloy particles " (2004 The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleed-through, substandard margins, and improper alignment can adversely affect reproduction.In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. UMI ABSTRACTMetal matrix composites (MMC), especially A1 matrix composites, received a lot of attention during many years of research because of their promise for the development of automotive and aerospace materials with improved properties and performance, such as lighter weight and better structural properties, improved thermal conductivity and wear resistance. In order to make the MMC materials more viable in various applications, current research efforts on the MMCs should continue to focus on two important aspects, including improving the properties of MMCs and finding more economical techniques to produce MMCs.Solid state vacuum sintering was studied in tap densifled A1 powder and in hot quasiisostatically forged samples composed of commercial inert gas atomized or high purity A1powder, generated by a gas atomization reaction synthesis (GARS) technique. The GARS process results in spherical A1 powder with a far thinner surface oxide. The overall results indicated the enhanced ability of GARS-processed A1 and A1 alloy powders for solid state sintering, which may lead to simplification of current A1 powder consolidation processing methods. Elemental Al-based composites reinforced with spherical Al-Cu-Fe alloy powders were produced by quasi-isostatic forging and vacuum hot pressing (VHP) consolidation methods. Microstructures and tensile properties of Al/Al-Cu-Fe composites were characterized. It was proved that spherical Al-Cu-Fe alloy powders can serve as an effective reinforcement particulate for elemental Al-based composites, because of their high hardness and a preferred type of matrix/reinforcement interfacial bonding, with reduced strain concentration around the particles. Ultimate tensile strength and yield strength of the composites were increased over the corresponding Al matrix values, far beyond typical observations. This remarkable strengthening was achieved without precipitation hardening and without severe strain hardening during consolidation because of the matrix choice vi (elemental Al) and the "low shear" consolidation methods utilized. This reinforcement effectiveness is further evidenced by elastic modulus measurements of the composites that are very close to the upper bound predictions of the rule of mixtures. The load partitioning measurements by neutron diffraction showed that composite samples made from GARS powders present significantly higher load transfer effic...

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“…The knowledge of the spatial and directional distribution of RS is considerably important in order to determine their influence on the material. Different methods can be used for accurate evaluation of the stress field by means of neutron diffraction technique, both in two and three dimensions, and it has been proved already that they are feasible with the main available neutron sources in the world [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Residual stress measurement by neutron diffraction in AA6082 extruded samples submitted to different quenching rates

Rogante

Battistella

Rustichelli

2004

Journal of Alloys and Compounds

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Determination of residual stresses in materials and industrial components by neutron diffraction

Cited by 27 publications

References 24 publications

Force transmission of flexure-based leverage mechanism for static unbalance measuring system under self-gravity effect

Force transmission of flexure-based leverage mechanism for static unbalance measuring system under self-gravity effect

The Microstructure-Processing-Property Relationships in an Al Matrix Composite System Reinforced by Al-Cu-Fe Alloy Particles

Residual stress measurement by neutron diffraction in AA6082 extruded samples submitted to different quenching rates

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