Changes in the misfit stresses in an Al/SiCp metal matrix composite under plastic strain

Fitzpatrick, Michael E.; Withers, Philip J.; Baczmański, Andrzej; Hutchings, M. T.; Levy, Robert; Ceretti, Monica; Lodini, Alain

doi:10.1016/s1359-6454(01)00401-3

Cited by 58 publications

(35 citation statements)

References 6 publications

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“…The values are consistent with thosem easured previously, [7,28] at around 70 MPa in the matrix and -340 MPa in the reinforcement.A st he composite is loaded elastically,t here is initially no change in the misfit stress:t his justifies the use of an aspect ratio of 1.6, as am iscalculation of the elastic load transfer would manifest itselfa savariation in the calculated misfit stress during elastic loading (even a change of 0.1 in the aspectratio does produce ameasurable difference in the results). The misfit stress should remain constant unless there is achange in temperature or the onset of plastic effects.…”

Section: Stress Separationsupporting

confidence: 93%

Effect of cyclic plasticity on internal stresses in a metal matrix composite

Daymond

Fitzpatrick

2006

Metall Mater Trans A

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Neutron diffraction has been used to measurethe elastic strains in asilicon carbide particle-reinforced aluminum alloy during cyclic plasticity.S trains were recorded in both phases of the material, in sufficient directionst oa llowf or calculation of the internal stresses. The shape misfit stress in the composite was calculated from the macroscopics tress data using an Eshelby-based model. Changes in the misfit stress causedbyplastic deformation can be clearlyobserved. Local plastic anisotropy of the matrix material is also seen and was monitored by comparing results from the two diffraction planes, {111} and {200}, that were measured. The results haveb een comparedt ot hoseo btained using an elasto-plastic self-consistent modeling approach, which shows the evolution of load sharing between the matrix and reinforcement, as well as the origin of the plastic anisotropy strains in the aluminum.

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Section: Stress Separationsupporting

confidence: 93%

Effect of cyclic plasticity on internal stresses in a metal matrix composite

Daymond

Fitzpatrick

2006

Metall Mater Trans A

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“…Metal matrix composites are well-known to generate internal residual stresses in the two phases, because of the difference in coefficient of thermal expansion (CTE) of the matrix and reinforcement [12][13][14]. For an Al-SiC system with 20% SiC partlices, where the matrix has a CTE around five times higher than the reinforcement (~4.5 µε/K compared with 23.4 µε/K), typical residual stresses at room temperature arising from the shape misfits are +70 MPa in the matrix and -280 MPa in the reinforcement [13].…”

Section: Introductionmentioning

confidence: 99%

Fatigue and fracture of a 316 stainless steel metal matrix composite reinforced with 25% titanium diboride

Bacon

Edwards

Moffatt

et al. 2013

International Journal of Fatigue

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“…However, during the manufacturing and subsequently heat treatments, tensile stresses are always generated [1]. As the formed tensile stresses may deteriorate the fatigue properties, it is therefore of interest to apply a mechanical surface treatment to change the unfavorable stress state [4]. As an effective and important surface treatment method, shot peening (SP) can considerably improve fatigue strength and fatigue life of cyclically loaded metallic components by inducing compressive residual stress (CRS) and work hardening into the surface region [5].…”

Section: Introductionmentioning

confidence: 99%