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titanium alloy with tri-modal microstructure [J]. Materials Science and Engineering A, 2019, 739: 203-213. [27] LIU L M, DU X, ZHU M L, CHEN G Q. Research on the microstructure and properties of weld......
-sheng. Microstructure evolution during solution treatment of extruded Al-Zn-Mg profile containing a longitudinal weld seam [J]. Journal of Alloys and Compounds, 2017, 729: 210-221. [6] LI Bo, PAN......
, CHEN X X, ZHANG W D. Effects of extrusion parameters and post-heat treatments on microstructures and mechanical properties of extrusion weld seams in 2195 Al-Li alloy profiles [J]. Journal...): 1683-1697. [4] YI J, WANG G, LI S K, LIU Z W, GONG Y L. Effect of post-weld heat treatment on microstructure and mechanical properties of welded joints of 6061-T6 aluminum alloy [J]. Transactions......
fracture. Hot extrusion can weld and eliminate most casting defects in the composites. Additionally, hot extrusion causes the agglomerated Al2O3p to disperse evenly due to its the excellent preferential......
quality. The increase in surface roughness is probably due to the formation of machining-induced surface pores during polishing or it may be generated by means of a grain fall-off mechanism. FREI... machining may not be feasible. In conventional machining, surface roughness of substrate increases due to the formation of machining-induced surface pores during polishing or grain fall-off......
liquid, the water occupies the pores. While in case of unsaturated soil, as pore water and pore air coexist in the pores, the seepage process is generally a two-phase flow problem with different flow......
and inside the pores, thus improving the catalytic performance [64]. The methods for preparing porous perovskite-type oxides generally include hard template method and soft template method. According..., and the formation of pores and required oxides can occur simultaneously [68-70]. As a soft template for preparing porous perovskite-type oxides, polymeric materials, such as poly(methylmethacrylate) (PMMA......
feature of a closed cell metallic foam is the ordered collapse of pores in compressive conditions, which allows for the controlled conversion of impact energy during plastic deformation up to very... of the entire structure [49,51,56]. 3 Results and discussion 3.1 Structure of metallic foams Closed cell foams consist of numerous pores, cell walls (cell faces) and cell struts (plateau borders) [57,58......
-linear deformation, which is derived principally from the closure of the pre-existing microscopic pores or cracks inside the samples. Then, the approximate elastic deformation is reached and sustained... energy is close to 1.0, which is caused by the adjustment of the applied stress of the specimen. Subsequently, due to the closure of the pores and/or microcracks in the sample and the initiation......
. Their average pore diameters are 0.35-0.45 mm and the pore size distribution becomes narrow with the increase of cold-pressure. Sintered preform C2 has evenly distributed pores. Its compact structure......
