The low cycle fatigue behavior of aluminum alloy based particulate composites
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Case Western Reserve University School of Graduate Studies / OhioLINK
1992
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=case1056483090 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-case10564830902021-08-03T05:30:45Z The low cycle fatigue behavior of aluminum alloy based particulate composites Liu, Changqi low cycle fatigue behavior aluminum alloy based particulate composites <p>MB85 (Al-3.5%Cu-2.4%Mg Alloy reinforced with SiC particulates) and 2014 (Al-4.2%Cu-1.5%Mg alloy reinforced with Al<sub>2</sub>O<sub>3</sub> particulate) composites were heat-teated to underaged and overaged conditions followed by low cycle fatigue testing with total strain control. The results include three aspects: (i) Bauschinger effect and internal residual stress, (ii) Cyclic work hardening behavior, and (iii) Fatigue life and low cycle fatigue damage processes. X-ray diffraction techniques were used to measure the residual internal stress to compare with the Bauschinger measurements. SEM and TEM were used to characterize the microstructures before, during, and after the test. In light of a literature review on the above aspects, the possible mechanisms occuring during cyclic deformation and fatigue are discussed. The main results are as follows: </p><p>(1) Bauschinger parameters (σ<sub>b</sub> and β<sup>1</sup>) increase with increasing plastic prestrain (ε<sub>p</sub>).</p><p>(2) Reinforcements and heat treatment conditions have strong effects on the BEPs: BEP<sub>OA</sub> > BEP<sub>UA</sub> in the same material; BEP<sub>CP</sub> > BEP<sub>CT</sub> in the same heat treatment; BEP<sub>20%SiC</sub> > BEP<sub>15%SiC</sub> in the same heat treatment.</p><p>(3) Internal stress may be measured both by Bauschinger Effect and by x-ray diffraction. Both results are comparable.</p><p>(4) Cyclic deformation behavior is strongly affected by the reinforcements and heat treatment conditions. For a given composite material and a fixed heat treatment condition, the cyclic deformation behaviors is determined by the initial plastic strain.</p><p>(5) The Manson-Coffin expression can be used to predict the fatigue life of the composites.</p> 1992 English text Case Western Reserve University School of Graduate Studies / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=case1056483090 http://rave.ohiolink.edu/etdc/view?acc_num=case1056483090 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
low cycle fatigue behavior aluminum alloy based particulate composites |
| spellingShingle |
low cycle fatigue behavior aluminum alloy based particulate composites Liu, Changqi The low cycle fatigue behavior of aluminum alloy based particulate composites |
| author |
Liu, Changqi |
| author_facet |
Liu, Changqi |
| author_sort |
Liu, Changqi |
| title |
The low cycle fatigue behavior of aluminum alloy based particulate composites |
| title_short |
The low cycle fatigue behavior of aluminum alloy based particulate composites |
| title_full |
The low cycle fatigue behavior of aluminum alloy based particulate composites |
| title_fullStr |
The low cycle fatigue behavior of aluminum alloy based particulate composites |
| title_full_unstemmed |
The low cycle fatigue behavior of aluminum alloy based particulate composites |
| title_sort |
low cycle fatigue behavior of aluminum alloy based particulate composites |
| publisher |
Case Western Reserve University School of Graduate Studies / OhioLINK |
| publishDate |
1992 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=case1056483090 |
| work_keys_str_mv |
AT liuchangqi thelowcyclefatiguebehaviorofaluminumalloybasedparticulatecomposites AT liuchangqi lowcyclefatiguebehaviorofaluminumalloybasedparticulatecomposites |
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1719421111152672768 |