首页|Microstructural Evolutions and Mechanical Properties of Energetic Al1(TiZrNbTaMoCr)15 High-Entropy Alloys
Microstructural Evolutions and Mechanical Properties of Energetic Al1(TiZrNbTaMoCr)15 High-Entropy Alloys
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The present study focuses on investigating the microstructural evolutions and mechanical properties of energetic Al1(TiZrNbTaMoCr)15 refractory high-entropy alloys with the different heat treatments at low Al content state.It is found that even with a reduction in the Al content,the strength of these alloys remains unaffected at room temperature and high temperature,while the plasticity improves significantly.In particular,the coherent BCC/B2 microstructure with needle-like B2 nanoprecipitates dispersed into the BCC matrix is formed in 873 K-aged Al1Ti6Zr2Nb3Ta3Mo0.5Cr0.5 alloy.Therefore,this alloy exhibits the highest compression yield strength(σYS=1333 and 717 MPa)at room temperature and 1073 K,respectively.After 973 K-aged,the coherent BCC/B2 microstructure underwent destabilization,and the B2 phase transforms into the brittle Zr5Al3 phase which then coarsens and dominates the microstructure of S3-AITa3 alloy after 1073 K-aged.Moreover,these current alloys exhibit exceptionally high theoretical exothermic enthalpy(ΔH),surpassing 11606 J.g-1,which highlights their significant potential as innovative high-performance energetic structural materials.
Xuan-Hong Cai、Zhen-Hua Wang、Ben Niu、Jin-Feng Li、Qing Wang
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Key Laboratory of Materials Modification By Laser,Ion and Electron Beams(Ministry of Education),Engineering Research Center of High Entropy Alloy Materials(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China
Institute of Materials,China Academy of Engineering Physics,Mianyang 621908,China
Key Basic Research Project of National Foundation Strengthening ProgramNational Natural Science Foundation of China
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