The Alamo may be the most renowned structure in the city, but there are plenty of magnificent historical buildings to see—from the Emily Morgan Hotel to the Meyer Halff House. Stretched along the San Antonio River is the famous River Walk, where residents and visitors alike can walk or bike from the San Antonio Zoo to the Witte Museum, the ...
In this work, the mechanical response as a function of ageing time at 700 °C for a cold-rolled complex alloy with a chemical composition of Co 40 Ni 33 Cr 15 Al 5 Ti …
Asymmetric rolling (AsR) was carried out to achieve a gradient ultrafine ferrite and martensite duplex structure in a commercial low-carbon microalloyed steel and compared with symmetric rolling. Two specific fiber textures 〈110〉//RD and 〈111〉//ND were developed through the thickness when imposing shear strains by AsR.
Structural refinement by cold rolling (10 to 80 pct reductions) of interstitial free (IF) steel containing Mn and B has been investigated from samples with different initial structures: (a) lath martensite, (b) coarse ferrite (grain size 150 μm), and (c) fine ferrite (22 μm). Unalloyed IF steel with a coarse grain size (120 μm) has also included based on a …
The effects of MDI on the thermal properties of lignin and the graphite-like microcrystalline structure of lignin-based ultrafine carbon fibers were extensively studied and investigated. The incorporation of MDI decreased the thermal stability of lignin, increased the carbon yield and enhanced the formation of graphite-like microcrystallites ...
book Catalog Search. Search the physical and online collections at UW-Madison, UW System libraries, and the Wisconsin Historical Society.
The second episode of AMC's post-apocalyptic series 'The Walking Dead: Daryl Dixon – The Book of Carol,' the sophomore season of 'The Walking Dead: Daryl Dixon,' follows the aftermath of Carol Peletier and Ash Patel's journey to France.After starting their life-threatening trip amid a brutal attack by a herd of walkers, they land on …
The submicron silica material achieved the highest compressive strength with a 40% dosage. In the test and analysis of the ultrafine powder concrete bridge building structure, the fuzzy comprehensive judgment grade is III. That is, there is a certain degree of damage state, and measures must be taken, which is consistent with the field test ...
It was found that the ferrite and austenite structure gradually evolved into an ultrafine structure from the random directional lath structure to lamellar structure with lath longitudinal direction parallel to the rolling direction with increasing rolling strain. It was found that the thickness of the laths was gradually refined with increasing ...
Unraveling the atomic structures of ultrafine iron clusters is critical to understanding their size-dependent catalytic effects and electronic properties. Here, we describe the stable close-packed structure of ultrafine Fe clusters for the first time, thanks to the superior properties of graphene, including the monolayer thickness, chemical ...
2.4. Characterization2.4.1. Mechanical property. The universal tensile machine (Instron-68TM-10, USA) was used to measure tensile strength and tensile modulus of the composite paper (50 mm × 5 mm) at room temperature and with a strain rate of 5 mm/min, The tensile strength of the PLA/CFs composite paper (120 mm × 15 mm) were …
A novel way was introduced to design ultrafine lamellar eutectic structure. • A new bimodal structure was fabricated by semi-solid sintering. • It contains coarse Ti 2 (Co, Fe) embedded in ultrafine lamellar eutectic matrix.. Its balanced strength and ductility exceeds reported values of similar alloys.
Engineering of the catalysts' structural stability and electronic structure could enable high-throughput H2 production over electrocatalytic water splitting. Herein, a double-shell interlayer confinement strategy is proposed to modulate the spatial position of Ru nanoparticles in hollow carbon nanoreactors for achieving tunable sizes and electronic …
Direct synthesis and structure characterization of ultrafine CeO 2 nanoparticles. Chenguo Hu 1,2, Zuwei Zhang 1, Hong Liu 2,3, Puxian Gao 2 and Zhong Lin Wang 2. Published 22 November 2006 • IOP Publishing Ltd Nanotechnology, Volume 17, Number 24 Citation Chenguo Hu et al 2006 Nanotechnology 17 5983 DOI 10.1088/0957 …
Microstructure analysis indicate that although all SSSed alloys have the same three phase constitutions of bcc β-Ti, bcc Ti(Fe, Co), and fcc Ti 2 (Co, Fe), the morphology and distribution of the eutectic structure transforms from limited length and minor quantity, to partial fine alternating bcc β-Ti and bcc Ti(Fe, Co) lamellae, and further ...
In this paper, based on the dual-scale structure of the yarn and shoe upper fabric, a composite yarn with a core-sheath structure is designed, and a using plating stitch pattern weft-knitted whole garment thermal insulation shoe upper fabric with double-layer structure is proposed. ... Liu L, Fu J, Hu XY, et al. Ultrafine silica aerogels ...
Exposure to cold environments could cause the human blood vessels to constrict, which leads to reduced blood circulation, resulting in frostbite and even death [1].Natural fibers like cotton and wool have been used for warmth retention, thanks to their fluffy structure with a high porosity and ease of access [2, 3].However, these fibers …
Compared with a typical ultrafine-grain in the solid sintered sample fabricated at 900 °C (Fig. 2 c), the SSSed one has a bimodal microstructure comprised of coarse-grained bcc β-Ti matrix (15–30 μm) surrounding coarse-grained fcc Ti 2 (Co, Fe) (5–15 μm) and ultrafine-grained lamellar eutectic structure (β-Ti + Ti(Fe, Co)) (Fig. 2 d ...
Abstract The effect of vanadium microalloying on ultra-high strength dual phase (DP) ferrite-martensite steel microstructure and properties was studied. It was …
To achieve an ultrafine structure, the 0Cu was cold-rolled from 8 mm to 4 mm and annealed at 800 °C for 5 min to refine the coarse grains after homogenization. Then the 4-mm-thick plate was cold ...
Ultrafine powder coating: Smooth surface, dense structure and enhanced corrosion resistance. Author links open overlay panel Jinbao Huang a f, Marshall Yang a, ... and to analyze the impacts of ultrafine powders on film structures and corrosion performance. The ultrafine powder, due to the smaller particle size and larger charge to …
Fairly uniform (ultra)fine–grain structure with the grain size of about 2 µm and the subgrain size of about 1–1.2 µm can be processed in a complex and hard-to …
Ultrafine grained structure with an average grain size of 0.3 È m was uniformly evolved at the cumulative strain of ™ǻİ= 2.0. The multi-directionally forged Mg alloy up to ™ǻİ = 2.0 exhibited marvelous mechanical properties of 530 MPa in yield stress and 650 MPa in ultimate tensile strength with 9% plastic strain to fracture.
The annealing behavior of the cryo-rolled HEA is featured by the formation of ultrafine grain structure, absence of the HCP phase, and profuse Cr-rich σ phase precipitation. The absence of the HCP phase is consistent with the expected HCP → FCC transformation, as also observed in the CR material [30] .
Mechanical alloying allows us to form the nonequilibrium structures (nanocrystalline, ultrafine grain structure, etc.) influencing the improvement of some properties. The process can be controlled by the following parameters: time of milling, the ball to powder mass ratio, type of the mill, milling speed, etc [26,36].
The heterogeneous lamella structure is characterized with soft micrograined lamellae embedded in hard ultrafine-grained lamella matrix. The unusual high strength is obtained with the assistance of high back stress developed from heterogeneous yielding, whereas the high ductility is attributed to back-stress hardening and dislocation …
Structural refinement by cold rolling (10 to 80 pct reductions) of interstitial free (IF) steel containing Mn and B has been investigated from samples with different initial …
This can be attributed to the formation of UFAGs and SMFGs inside the shear bands. It is found that the submicron/ultra-fine grained structure of the steel after …
Wang et al. 22 successfully prepared a hollow structure ultrafine spherical 1,1′-dihydroxy-5,5′-bitetrazole dihydroxyamine salt (TKX-50) with a particle size in the range of 1–6 μm and a bulk density of 1.851 g/cm 3 by spray drying method (Fig. 2). The explosive shows better safety performance.
Computer simulation of superplastic forming of a three-sheet structure containing an ultrafine-grained core, V Ganieva, A Kruglov, R Lutfullin, O Rudenko, F Enikeev
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