In order to obtain good strength−plasticity synergy for a medium entropy alloy(MEA)CrCoNi,cold rolling,asymmetric rolling,cryorolling and asymmetric-cryorolling with subsequent annealing at different temperatures were...In order to obtain good strength−plasticity synergy for a medium entropy alloy(MEA)CrCoNi,cold rolling,asymmetric rolling,cryorolling and asymmetric-cryorolling with subsequent annealing at different temperatures were conducted.The results showed that the asymmetric-cryorolled alloy achieved a high strength of over 1.6 GPa.After annealing at 1073 K,it retained a high strength of~1 GPa while the elongation reached nearly 60%.After annealing,the heterogeneous characteristics were formed in asymmetric-cryorolled samples,which were found to be more distinct than those of the samples subjected to asymmetric rolling.This resulted in the generation of high strength and ductility.展开更多
Sandwich-like Al/Ti/Al-laminated composites have many advantages such as low density and high specific strength with value in mechanical manufacturing and aerospace engineering.Here,Al/Ti/Al-laminated composites were ...Sandwich-like Al/Ti/Al-laminated composites have many advantages such as low density and high specific strength with value in mechanical manufacturing and aerospace engineering.Here,Al/Ti/Al-laminated composites were fabricated by hot roll bonding and subsequent processes:cryorolling(-190℃and-100℃),cold rolling(25℃),and hot rolling(300℃).Their bonding strength and mechanical properties were then studied by an Autograph AGS-X universal electronic testing machine.The results show that cryorolling can improve the interface bonding strength and tensile strength of Al/Ti/Allaminated composites.For the Al/Ti/Al-laminated composites subjected to cryorolling at-100℃,they have the highest strength near 260 MPa—this is 48 MPa and 41 MPa higher than the laminated composites subjected to cold and hot rolling,respectively.These results also show the strongest peeling strength.Finally,the mechanisms of the enhancement of bonding strength and mechanical properties of Al/Ti/Al-laminated composites subjected to cryorolling were mainly discussed.展开更多
基金supported by the Hunan High-Tech Industry Science and Technology Innovation Leading Plan,China(No.2020GK2032)the Huxiang High-Level Talent Gathering Project of Hunan Province,China(No.2018RS3015)+1 种基金the Innovation Driven Program of Central South University,China(No.2019CX006)the Research Fund of the Key Laboratory of High Performance Complex Manufacturing at Central South University,China。
文摘In order to obtain good strength−plasticity synergy for a medium entropy alloy(MEA)CrCoNi,cold rolling,asymmetric rolling,cryorolling and asymmetric-cryorolling with subsequent annealing at different temperatures were conducted.The results showed that the asymmetric-cryorolled alloy achieved a high strength of over 1.6 GPa.After annealing at 1073 K,it retained a high strength of~1 GPa while the elongation reached nearly 60%.After annealing,the heterogeneous characteristics were formed in asymmetric-cryorolled samples,which were found to be more distinct than those of the samples subjected to asymmetric rolling.This resulted in the generation of high strength and ductility.
基金the National Natural Science Foundation of China(Grant Number:51674303)the Huxiang High-Level Talent Gathering Project of HUNAN Province(Grant Number:2018RS3015)+2 种基金the Innovation Driven Program of Central South University(Grant Number:2019CX006)the Research Fund of the Key Laboratory of High Performance Complex Manufacturing at Central South Universitythe Ministry of Science and Higher Education of Russia Federation for the financial support through the Grant 14.Z50.31.0043。
文摘Sandwich-like Al/Ti/Al-laminated composites have many advantages such as low density and high specific strength with value in mechanical manufacturing and aerospace engineering.Here,Al/Ti/Al-laminated composites were fabricated by hot roll bonding and subsequent processes:cryorolling(-190℃and-100℃),cold rolling(25℃),and hot rolling(300℃).Their bonding strength and mechanical properties were then studied by an Autograph AGS-X universal electronic testing machine.The results show that cryorolling can improve the interface bonding strength and tensile strength of Al/Ti/Allaminated composites.For the Al/Ti/Al-laminated composites subjected to cryorolling at-100℃,they have the highest strength near 260 MPa—this is 48 MPa and 41 MPa higher than the laminated composites subjected to cold and hot rolling,respectively.These results also show the strongest peeling strength.Finally,the mechanisms of the enhancement of bonding strength and mechanical properties of Al/Ti/Al-laminated composites subjected to cryorolling were mainly discussed.
