Relaxation of residual stress in MMC after combined plastic deformation and heat treatment

Bruno, Giovanni; Ceretti, Monica; Girardin, E.; Giuliani, Alessandra; Mănescu, Adrian

doi:10.1016/j.scriptamat.2004.07.016

Cited by 21 publications

(9 citation statements)

References 13 publications

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“…After unloading, we observe additional tensile residual strain in the axial direction and compressive in the radial. This agrees with previous observations in Al-matrix composites [6,31,32].…”

Section: In-situ Neutron Diffractionsupporting

confidence: 93%

Stress-induced damage evolution in cast AlSi12CuMgNi alloy with one- and two-ceramic reinforcements. Part II: effect of reinforcement orientation

et al. 2019

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While there is a large body of literature on the micro-mechanical behavior of metal matrix composites (MMCs) under uniaxial applied stress, very little is available on multi-phase MMCs. In order to cast light on the reinforcement mechanisms and damage processes in such multi-phase composites, materials made by an Al-based piston alloy and containing one and two ceramic reinforcements (planar-random oriented alumina fibers and SiC particles) were studied. In-situ compression tests during neutron diffraction experiments were used to track the load transfer among phases, while X-ray computed tomography on pre-strained samples was used to monitor and quantify damage. We found that damage progresses differently in composites with different orientations of the fiber mat. Because of the presence of intermetallic network, it was observed that the second ceramic reinforcement changed the load transfer scenario only at very high applied load, when also intermetallic particles break. We rationalized the present results combining them with previous investigations and using a micromechanical model.

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Section: In-situ Neutron Diffractionsupporting

confidence: 93%

Stress-induced damage evolution in cast AlSi12CuMgNi alloy with one- and two-ceramic reinforcements. Part II: effect of reinforcement orientation

et al. 2019

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“…7, 8 obtained for the fractured samples) are also well predicted by the model, assuming zero initial stresses. This results agree well with previous works showing relaxation and complete exchange of stress state in the Al/SiC p composite and also in other materials subjected to plastic deformation [11,13,30,31]. The new finding of the present work is that the stress relaxation occurs very early i.e.…”

Section: Evolution Of Lattice Strains In the Al/sic P Composite And Asupporting

confidence: 93%

“…The interpretation of the diffraction data using Eshelby type models (including self-consistent method) showed that important mismatch stresses are induced during composite cooling due to the difference in thermal expansion coefficient of the phases [29]. These stresses can be significantly modified by plastic deformation [30] or combination of thermal and mechanical treatments [31] long before damage of the material. The release/modification of the residual phase stresses is of vital importance due to their influence on fatigue cracking process in MMC [32].…”

Section: Introductionmentioning

confidence: 99%

Neutron Diffraction Study of Phase Stresses in Al/SiCp Composite During Tensile Test

et al. 2018

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The stress partitioning between phases, phase stress relaxation as well as origins of Al/SiC p composite strengthening are studied in the present work. In this aim, the measurements of lattice strains by neutron diffraction were performed in situ during tensile test up to sample fracture. The experimental results were compared with results of elastic-plastic self-consistent model. It was found that thermal origin phase stresses relax at the beginning of plastic deformation of Al/SiC p composite. The evolution of lattice strains in both phases can be correctly simulated by the elastic-plastic self-consistent model only if the relaxation of initial stresses is taken into account. A major role in the strengthening of the studied composite plays a transfer of stresses to the SiC p reinforcement, however the hardness of Al metal matrix is also important.

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“…Both domestic and foreign researchers [1][2][3][4][5][6][7] are actively involved in development and study of the methods of combined and joint machining.…”

Section: Introductionmentioning

confidence: 99%

Dimensional Joint Running-in of Cylindrical Parts of Mining Machinery

et al. 2020

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The current task of engineering is to ensure the quality and reliability of critical parts of an extended cylindrical shape. This task is especially relevant in the production of power hydraulics parts for mining equipment (ME). One of the ways to ensure the required quality of the surface layer (SL) of mining equipment parts is the use of combined and joint methods of parts hardening by surface plastic deformation (SPD). Combined methods present sequential machining in which the methods used are separated into different technological steps, while the joint machining is carried out by concentrating the methods into one technological step (setup). The analysis shows that this approach, although it has a number of indisputable advantages, allowing an increase in the accuracy, machining efficiency and SL quality, is not without drawbacks that hinder the use of combined and joint machining methods in the manufacture of parts with IT 8-9 accuracy. The dimensional joint running- in method (DJR) is based on the original scheme of interaction between the cutting and deforming tools allowing a cylindrical surface with an accuracy of IT 8-9 and a roughness of no more than Ra 0.4 μm, hardened to a depth of 10 mm in one pass. The study shows the possibilities of a much greater SL deformation without its destruction than with the traditional SPD. The analysis of the structure and basic technologies has shown the feasibility of replacing a number of turning and grinding operations with one dimensional joint running-in operation. The design of the device for DJR based on a lathe is given. The completed economic calculations have established that it is possible to implement this method in the existing economic situation.

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Relaxation of residual stress in MMC after combined plastic deformation and heat treatment

Cited by 21 publications

References 13 publications

Stress-induced damage evolution in cast AlSi12CuMgNi alloy with one- and two-ceramic reinforcements. Part II: effect of reinforcement orientation

Stress-induced damage evolution in cast AlSi12CuMgNi alloy with one- and two-ceramic reinforcements. Part II: effect of reinforcement orientation

Neutron Diffraction Study of Phase Stresses in Al/SiCp Composite During Tensile Test

Dimensional Joint Running-in of Cylindrical Parts of Mining Machinery

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