EXPERIMENTAL EVALUATION OF FRACTURE TOUGHNESS FOR MULTI-LAYERED AL/CU/MG COMPOSITE PRODUCED BY COLD ROLL BONDING PROCESS
In recent years, multi layered composite have been attention of many researchers and different industries. Cold roll bonding (CRB) is one of the method for produce layered composi...
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| Veröffentlicht in: | مهندسی مکانیک شریف 2019-05, Vol.35.3 (1), p.83-92 |
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| Format: | Artikel |
| Sprache: | per |
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| Zusammenfassung: | In recent years, multi layered composite have been attention of many researchers and different industries. Cold roll bonding (CRB) is one of the method for produce layered composite that compared to other composite manufacturing methods are more economically and have the ability to produce layered composite with different material. In the present study, Al/Cu/Mg layered composite was produced through CRB method at room temperature, without lubricant and via using laboratory rolling machine by applying 60\% reduction in thickness and plane stress fracture toughness was investigated experimentally, by R curve method for initial aluminum, copper, magnesium and Al/Cu/Mg composite. Results showed that the value of plane stress fracture toughness depends on both strength and ductility. Also, fracture toughness of produced layered composite reached 32.1, which increased 3.24, 2.18 and 2.73 times, respectively, compared to the initial samples of aluminum, copper and magnesium. In addition to investigations of the plane stress fracture toughness, mechanical properties, fracturgraphi and microstructure investigated through uniaxial tensile test, microhardness measurement, and scanning electron microscope (SEM) and optic microscope (OM). Results of carried out tests, showed the value of ultimate tensile strength (UTS) and microhardness for Al/Cu/Mg layered composite compared to initial Al 1050, pure Cu and Mg AZ31B increased but the elongation decreased sharply, that the main cau |
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| ISSN: | 2676-4725 2676-4733 |
| DOI: | 10.24200/j40.2018.10831.1448 |