An investigation of the isothermal creep response of Al-based composites by neutron diffraction

Winand, H.M.A.; Whitehouse, A.F.; Withers, Philip J.

doi:10.1016/s0921-5093(00)00762-0

Cited by 38 publications

(18 citation statements)

References 29 publications

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“…As seen, this view differs from the simpler explanation proposed in the present research. High values of the load transferred to the reinforcement have been obtained in similar composite from in situ direct measurements by neutron diffraction [25]. In this case, a value of 0.25 GPa has been measured (see Table 1 of reference [25]).…”

Section: Elongated Particle Reinforced Compositesmentioning

confidence: 77%

“…High values of the load transferred to the reinforcement have been obtained in similar composite from in situ direct measurements by neutron diffraction [25]. In this case, a value of 0.25 GPa has been measured (see Table 1 of reference [25]). This value is, in principle, relatively low in comparison to that calculated for the composite of reference [13].…”

Section: Elongated Particle Reinforced Compositesmentioning

confidence: 77%

“…Furthermore, it also implies that the maximum load that the composite can sustain is low. Additionally, the aspect ratio of the reinforcement in the composite studied in reference [25] is also lower than in reference [13].…”

Section: Elongated Particle Reinforced Compositesmentioning

confidence: 85%

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Load partitioning during creep of powder metallurgy metal matrix composites and Shear-Lag model predictions

Fernández¹,

González-Doncel²

2009

Materials Science and Engineering: A

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a b s t r a c tIt was shown in a previous work that the load transfer mechanism plays a relevant role during the high temperature deformation of discontinuously reinforced metal matrix composites, MMCs. This idea emerged from the comparison of the creep data of a powder metallurgy, PM, 6061Al-15vol%SiC w composite and the corresponding un-reinforced 6061Al alloy. The idea was further supported by a qualitative analysis of the creep data of MMCs from a number of investigations reported in the literature, particularly of PM composites. In the present work a quantitative and more thorough study of the creep data of these PM composites is presented. Specifically, a well-known Shear-Lag model is used to compare the composites creep strength increment and the predicted load transferred to the reinforcement. These new results sustain more thoroughly the relevance of the load transfer mechanism during creep of MMCs.

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Section: Elongated Particle Reinforced Compositesmentioning

confidence: 77%

Section: Elongated Particle Reinforced Compositesmentioning

confidence: 77%

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Load partitioning during creep of powder metallurgy metal matrix composites and Shear-Lag model predictions

Fernández¹,

González-Doncel²

2009

Materials Science and Engineering: A

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“…This approach aids the development of these models, while at the same time providing a physical interpretation of the experimental results. Experimental data to validate self-consistent models within the creep regime are limited [1,4,[6][7][8][9][10]. For example, Ma et al [10] studied internal stress evolution using in situ neutron diffraction when a polycrystalline superalloy was creep deformed at 900°C and a primary stress level of 425 MPa for about 35 h. The selection of such a high test stress and temperature seems to be limited by the availability of neutron beam time.…”

Section: Introductionmentioning

confidence: 99%

Internal strains between grains during creep deformation of an austenitic stainless steel

Chen

Wang

et al. 2015

J Mater Sci

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Internal strains that develop between grains during creep of an austenitic stainless steel were measured using in situ neutron diffraction. The secondary creep prestrained test specimens were considered. Measurements were undertaken before, during and post creep deformation at 550°C. There was no measurable change of internal strains between grains during in situ creep for 4 h at 550°C. In addition, the effect of increasing/reducing temperatures in a range from 470 to 550°C on the internal strains was measured and interpreted with respect to contributions from thermal expansion/contraction. No further internal misfit strains between grains were created when specimen crept during the dwell time at 530, 510, 490 and 470°C. Results are discussed with respect to (i) the general structure of self-consistent models and (ii) the optimised use of neutron sources for creep studies.

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“…However, the impact of interfacial strength on the fatigue strength is not completely understood up to now, because high as well as low interfacial strength may correlate with high fatigue strength [4,9,10].…”

Section: Introductionmentioning

confidence: 99%

Residual stress and damage development in the aluminium alloy EN AW-6061 particle reinforced with Al2O3 under thermal fatigue loading

Klaska

Beck

Wanner

et al. 2009

Materials Science and Engineering: A

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An investigation of the isothermal creep response of Al-based composites by neutron diffraction

Cited by 38 publications

References 29 publications

Load partitioning during creep of powder metallurgy metal matrix composites and Shear-Lag model predictions

Load partitioning during creep of powder metallurgy metal matrix composites and Shear-Lag model predictions

Internal strains between grains during creep deformation of an austenitic stainless steel

Residual stress and damage development in the aluminium alloy EN AW-6061 particle reinforced with Al2O3 under thermal fatigue loading

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