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| 1 | Fatigue behavior of high-entropy alloys: A review显示文摘Fatigue failures cost approximately 4% of the United States' gross domestic product(GDP). The design of highly fatigue-resistant materials is always in demand. Different from conventional strategies of alloy design, high-entropy alloys(HEAs) are defined as materials with five or more principal elements, which could be solid solutions. This locally-disordered structure is expected to lead to unique fatigue-resistant properties. In this review, the studies of the fatigue behavior of HEAs during the last five years are summarized. The four-point-bending high-cycle fatigue coupled with statistical modelling, and the fatigue-crack-growth behavior of HEAs, are reviewed. The effects of sample defects and nanotwins-deformation mechanisms on four-point-bending high-cycle fatigue of HEAs are discussed in detail. The influence of stress ratio and temperature on fatigue-crack-growth characteristics of HEAs is also discussed. HEAs could exhibit comparable or greater fatigue properties, relative to conventional materials. Finally,the possible future work regarding the fatigue behavior of HEAs is suggested. | CHEN PeiYong LEE Chanho WANG Shao-Yu SEIFI Mohsen LEWANDOWSKI John J DAHMEN Karin A JIA HaoLing XIE Xie CHEN BiLin YEH Jien-Wei TSAI Che-Wei YUAN Tao LIAW Peter K | 2018 | Science China(Technological Sciences)2018，61，2： | 3 |
| 2 | Energy Absorption and Deformation Mechanism of Lotus-type Porous Coppers in Perpendicular Direction显示文摘As metallic foams used for energy absorption in the automotive and aerospace industries, recently invented lotus-type porous metals are viewed as potential energy absorbers. Yet, solid conclusion on their eligibility as energy absorbers is still in question, particularly when compression is in the direction perpendicular to the axial orientation of cylindrical pores. In this work, the energy absorption of lotus-type porous coppers in the perpendicular direction is investigated at strain rates from 0.001 s^(-1) to^2400 s^(-1). The energy absorption capacity and the energy absorption efficiency are calculated to be4–16 k J/kg and 0.32–0.7, respectively, slightly inferior to metal foams and the same porous solid compressed in the parallel direction due to the shortened extent of the plateau stress region. The deformation mechanism is examined experimentally in conjunction with finite element modeling. Both suggest that gradual squeeze and collapse of pores are the mechanisms accommodating the energy absorption. The deformation is generally evenly distributed over pore ligaments and independent of strain rate. | Weidong Li Kai Xu Honghao Li Haoling Jia Xinhua Liu Jianxin xie | 2017 | Journal of Materials Science & Technology2017，33，11： | 2 |
| 3 | Cell Wall Buckling Mediated Energy Absorption in Lotus-type Porous Copper显示文摘The energy absorption characteristics of the lotus-type porous coppers at the strain rate of 10–3s–1to^2400 s–1were systematically investigated. Depending on the relative density and loading rate, the energy absorption capability of the tested samples varied from ~20 to ~85 MJ m–3, while the energy absorption efficiency fluctuated around ~0.6. An energy absorption efficiency curve based approach was proposed for unambiguous identification of the plateau regime, which gave an extension of ~0.50 strain range for the presently investigated porous coppers. With detailed observations of cell wall morphologies at various deformation stages, it was suggested that buckling of cell walls was the dominant mechanism mediating the energy absorption in lotus-type porous coppers. | Weidong Li Haoling Jia Chao Pu Xinhua Liu Jianxin Xie | 2015 | Journal of Materials Science & Technology2015，31，10： | 1 |
| 4 | Alloy composition dependence of formation of porousNi prepared by rapid solidification and chemical dealloy- ing 显示文摘 | QI ZHEN ZHANG ZHONGHUA JIA HAOLING | 2009 | Journal of Alloys and Compounds2009，，472： | 1 |
| 5 | Spin-canting and weak ferromagnetism in two novel 1D alternating chains with single cis-end-to-end azido bridges显示文摘By combining trans-4-styrylprydine (tsp) with azide system, we obtained two rare 1D cis-EE-azido-bridged compounds of [M2(N3)4(tsp)4(H2O)2] [M = Mn (1), Co (2)]. The magnetic study reveals that metal ions are anti-ferromagnetically coupled by cis-EE-azido-bridges and they show weak ferromagnetism below 4.0 K (1) and 4.2 K (2) due to the spin-canting caused by asymmetric magnetic interaction. | SUN HaoLing XIONG Jin JI ShaoFei ZHEN Xue JIA Li LIU Tao | 2012 | 中国科学:化学2012，42，6： | 0 |
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