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| 1 | Key roles of micro-particles in water on occurrence of cavitation-erosion of hydro-machinery显示文摘It has been believed for about one hundred years that the cavitation directly induces the cavitation erosion. It is proposed in this research that cavitation is only the necessary condition but not the sufficient condition of the cavitation erosion. The experiment performed on the rotary disk cavitation system shows that the micro-particles in the fluid play indispensable roles in the cavitation erosion process, and the generation of the erosion pits on the steel surface is also affected by the particles' size. These cracks and deformations on the sample surface indicate that the erosion is the result of the mechanical behavior. Numerical calculations are also provided to support this mechanism. | WANG JiaDao CHEN HaoSheng QIN Li LI Yongdian CHEN DaRong | 2008 | Chinese Science Bulletin2008，53，10： | 4 |
| 2 | Fusion boundary evolution, precipitation behaviour, and interaction with dislocations in an Fe–22Cr–15Ni steel weldment during long-term creep显示文摘A tungsten inert gas welded joint between a novel heat-resistant austenitic steel and ERNiCrCoMo-1 weld metal was investigated before and after creep in this study. The evolution of the microstructures in the base and weld metals was discussed based on the electron back-scatter diffraction(EBSD) and transmission electron microscopy(TEM) analyses. The preferred orientations of the fusion boundary after creep revealed the influence of the applied stress on creep deformation mechanism. A cooperative nucleation process of M23C6 carbides in the base metal was proposed. The finely distributed Cu-rich phase was cut off by the dislocations during creep, leading to increased mean size and reduced amount of the nano-Cu phase. A modified triple-precipitate hardening model was constructed based on TEM observations of the interactions between the particles and the dislocations in the base metal after creep at 200 MPa. The evolution of a μ phase in the weld metal involved epitaxial growth and dissolving into the matrix. | Yu Zhang Hongyang Jing Lianyong Xu Yongdian Han Lei Zhao Xishan Xie Zhengxin Tang | 2019 | Progress in Natural Science:Materials International2019，29，1： | 2 |
| 3 | Experimental study on creep damage evolution process of Type IV cracking in 9Cr–0.5Mo–1.8W–VNb steel welded joint显示文摘 | Lei Zhao Hongyang Jing Lianyong Xu Yongdian Han Junjie Xiu | 2011 | Engineering Failure Analysis2011，，： | 1 |
| 4 | Experimental investigation of specimen size effect on creep crack growth behavior in P92 steel welded joint显示文摘 | Lei Zhao Hongyang Jing Junjie Xiu Yongdian Han Lianyong Xu | 2014 | Materials and Design2014，，： | 1 |
| 5 | Process-microstructure-properties of CuAlNi shape memory alloys fabricated by laser powder bed fusion显示文摘Cu-based shape memory alloys(SMAs)show great potential in the application of high temperature,but their performance improvement combining with additive manufacturing is still challenging.In this paper,nearly defect-free(99.7%relative density)CuAlNi SMAs with two types of thermal-induced martensites,18R and 2H,were successfully fabricated by laser powder bed fusion(LPBF).The remelting printing strat-egy with systematic optimization framework including densification and printability analysis was used to get optimal process window.The twin-related self-accommodation structure with long period stacking order substructure was formed during additive manufacturing process.The as-build samples show excel-lent mechanical properties(ultimate compressive strength of 1593±10 MPa and large fracture strain of 23.0%±0.1%)with double-yielding,and outstanding shape memory effect,with maximum recoverable strain of 3.39% and nearly 100%recovery rate under compressive strain not exceeding 6%.Furthermore,the microstructural evolution in LPBF involving remelting,martensitic transformation,and 2H marten-site was discussed.This result not only builds the microstructure framework involving high reflectivity alloys and martensitic transformation but also provides insight into the applicability of LPBF process in producing Cu-based SMAs. | Yankun Zhang Lianyong Xu Lei Zhao Danyang Lin Minqian Liu Xueyan Qi Yongdian Han | 2023 | Journal of Materials Science & Technology2023，，21： | 0 |
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