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Microstructural Evo...
Microstructural Evolution during Accelerated Tensile Creep Test of ZK60/SiCp Composite after KoBo Extrusion
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- Wang, Yang-Yang (författare)
- Xian Siyuan Univ, Sch Engn, Xian 710038, Peoples R China.
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- Jia, Chen (författare)
- Xian Aerosp Prop Test Technol Inst, Xian 710100, Peoples R China.
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- Tayebi, Morteza (författare)
- Islamic Azad Univ, Sci & Res Branch, Young Researchers & Elites Club, Tehran 1477893855, Iran.
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- Hamawandi, Bejan, PhD (författare)
- KTH,Biomedicinsk fysik och röntgenfysik
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Xian Siyuan Univ, Sch Engn, Xian 710038, Peoples R China Xian Aerosp Prop Test Technol Inst, Xian 710100, Peoples R China. (creator_code:org_t)
- 2022-09-16
- 2022
- Engelska.
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Ingår i: Materials. - : MDPI AG. - 1996-1944. ; 15:18
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- In the current study, the creep properties of magnesium alloy reinforced with SiC particles were investigated. For this purpose, ZK60/SiCp composite was produced by the stir casting method following the KoBo extrusion and precipitation hardening processes. The creep tests were performed at 150 degrees C under 10-110 MPa. The results showed that the stress exponent (n) and the average true activation energy (Q) was changed at high stresses, was found with increasing stress, the creep mechanism changing from grain boundary sliding to dislocation climb. The results of microstructure characterization after the creep test showed that at low stresses, the dynamic recrystallization resulting from twinning induced the GBS mechanism. However, at high stresses, with increasing diffusion rates, conditions are provided for dynamic precipitation and the dislocation climb of the dominant creep mechanism. Examination of the fracture surfaces and the surrounding areas showed that the cavity nucleation in the ternary boundary and surrounding precipitation was the main cause of damage. The evaluation of the samples texture after creep showed that the unreinforced alloy showed a moderately strong fiber texture along the angle of phi(1) = 0-90 degrees, which was tilted about phi = 10 degrees. A new strong texture component was observed at (90 degrees, 5 degrees, 0 degrees) for the composite sample, which crept due to minor splitting of the basal pole by similar to 5 degrees toward RD.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- ZK60/SiCp composite
- dynamic precipitation
- dynamic recrystallization
- double twinning
- double Friedel-Escaig mechanism
- accelerated creep test
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- art (ämneskategori)
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