A method of quantitative characterization for the component of C/C composites based on the PLM video

Li, Y X; Qi, Lehua; Song, Yongshan; Li, H J

doi:10.1088/1757-899x/137/1/012016

Cited by 2 publications

(4 citation statements)

References 12 publications

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Section: Resultsmentioning

confidence: 99%

“…[ 24 ] As Al content increases, the stacking fault energy decreases and the DRX is more completed, however, both the amount and size increase, resulting in a fluctuation between the average grain size. [ 25,26 ] When the Al content is 3%, the amount of Mg 17 Al 12 and Al 11 (La, Sm) 3 phases is nearly the same, and the DRX is relatively easy and the grain breakages are relatively uniform, at the same time, the fine and uniformly dispersed Mg 17 Al 12 and Al 11 (La, Sm) 3 phases could inhibit the dislocation motion in the grain interior and pin the grain boundaries (shown in Figure 8), resulting in the minimized average grain size.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, in the as‐extruded AZE31‐05 alloy, 66.4% DRX with 32.7% sub‐structure resulted in weak texture could be related to the following two reasons: First, the as‐extruded AZE31‐05 alloy has the minimized average grain size, meaning the largest grain boundary area and more regions with high storage energy, and this could lead to recrystallized nucleation or imminent nucleation, thus accelerating the nuclear rate of recrystallization. Second, slip activation in 49.6% LAGBs indicates the easy start of the slips, which is responsible for the weakening (0001) basal texture, meanwhile, high grain boundary energy in 46.88% HAGBs suggests dislocations could pile up along the grain boundary and high stress for moving a dislocation cross grain boundary, [ 26 ] which combined with the slip activation is responsible for the strengthening and toughening result. Li has proved the fine DRXed grains have a large intermittent fluctuation in misorientation and different orientations, which weakened the recrystallized texture.…”

Section: Resultsmentioning

confidence: 99%

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Microstructures and Tensile Properties of New Mg–0.9Zn–0.2Mn–0.5RE Alloys via Different Al Additions

Zhang

et al. 2023

Adv Eng Mater

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Effects of Al content on the microstructure and tensile properties of Mg–0.9Zn–0.2Mn–0.5RE (0.2Sm + 0.3La) alloy have been systematically investigated. In the as‐cast Mg–0.9Zn–0.2Mn–0.5RE alloy, intermetallic compounds are identified as Mg41Sm5, Mg12La, and Mg12(La, Sm) phases, while when Al is added, new Mg17Al12 and Al11(La, Sm)3 phase is formed instead of Mg12(La, Sm) phase. As Al content increases, Al11(La, Sm)3 phase increases and the morphology changes from a bright needle to a short rod in the as‐cast alloys. Al11(La, Sm)3 phase is broken and characterized as polygonal and rod shapes in as‐extruded alloys, and gradually increases in size and segregation as Al content increases, resulting in an increase in the ultimate strength and fluctuation of the average grain size, yield strength, and elongation. It should be noted that the as‐extruded alloy has good elongation (A ≈ 25.3%) with 3% Al content and good tensile strength (280 MPa ≤ Rm ≤ 300 MPa) with 6% and 9% Al content. Besides, the as‐extruded Mg–0.9Zn–0.2Mn–0.5RE–3Al alloy shows outstanding ductility due to the weakened texture of DRXed and sub‐structured grains and the high SF value in pyramidal slip and basal slip.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Microstructures and Tensile Properties of New Mg–0.9Zn–0.2Mn–0.5RE Alloys via Different Al Additions

Zhang

et al. 2023

Adv Eng Mater

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“…The density or porosity is one of the most important quality criteria of spray-formed materials in the assprayed condition, because porosity reduces mechanical, thermal and electrical properties [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Spray forming of high density sheets

Meyer

Ellendt

Mädler³

et al. 2014

Materialwissenschaft Werkst

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Porosity is one of the most important quality criteria of spray‐formed materials in the as‐sprayed condition. Typically, spray‐formed sheets have a porous rim close to the substrate and depending on the spray conditions cold or hot porosity may also be present in the core of the deposit. This porosity has to be removed or minimized to make further processing steps such as rolling, forging or extrusion possible. In this paper, the influence of both substrate temperature and deposit surface temperature on porosity in spray‐formed sheets is studied. For this purpose spray forming experiments (sheet size 1000 mm × 250 mm) were carried out using three different materials: aluminium‐bronze, tin‐bronze and a nitriding steel. For the copper‐base alloys preheated steel‐substrates with different temperatures were moved through a scanning spray cone. In the case of steel a ceramic substrate at room temperature was used. In addition to the variation of the substrate temperature, the gas to metal mass flow ratio (GMR) was varied to achieve different deposit surface temperatures. During the run the surface temperature in the deposition zone was measured using a scanning, multi‐wavelength pyrometer. Samples of the deposits were polished and rasterized by light microscopy. The local porosity was characterized by digital image analysis. The influence of the substrate temperature and the GMR on the porosity in the vicinity of the substrate is evaluated and discussed in detail. The impact of the deposit surface temperature on the porosity was analyzed and is discussed as well. It was found that the deposit surface temperature has a strong impact on porosity for spray‐formed sheets. Finally, experimental results were used to develop a new approach to predict the porosity in spray‐formed sheets. The results clearly show the dependence on material properties. This approach can be used to identify process parameters to generate high density sheets in the future.

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A method of quantitative characterization for the component of C/C composites based on the PLM video

Cited by 2 publications

References 12 publications

Microstructures and Tensile Properties of New Mg–0.9Zn–0.2Mn–0.5RE Alloys via Different Al Additions

Microstructures and Tensile Properties of New Mg–0.9Zn–0.2Mn–0.5RE Alloys via Different Al Additions

Spray forming of high density sheets

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