Lattice parameter dependence on long-range ordered degree during order–disorder transformation

Chen, Guoliang; Ni, Xiaodong; Nsongo, Timothée

doi:10.1016/j.intermet.2004.02.013

Cited by 16 publications

(5 citation statements)

References 17 publications

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“…Ni 3 Al intermetallic compound is known for the linear dependence of its lattice parameter on the LRO parameter. 13,14) The lattice parameter, a, is plotted in Fig. 2 as a function of N and compared with the value determined for the as-homogenized structure, considered fully ordered.…”

Section: Resultsmentioning

confidence: 99%

Heterogeneous Process of Disordering and Structural Refinement in Ni<SUB>3</SUB>Al during Severe Plastic Deformation by High-Pressure Torsion

et al. 2010

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The process of grain refinement in Ni 3 Al by high-pressure torsion (HPT) was investigated up to 100 turns. The entire diametric sections of the deformed samples were analyzed by optical microscopy and image processing methods in order to evaluate both the spatial distribution and the volume fractions of the nanocrystalline and coarse grains. A thick band of nanocrystalline phase was formed in the middle section of the samples, and a structure containing mainly coarser ordered fragments was present in the vicinity of the top and bottom surfaces. Pseudotwinning along {111} was observed at the boundaries of coarse-fragmented grains as well as the inside of the fragments and is put forward as a possible mechanism for disordering and nanocrystalline structure formation in Ni 3 Al.

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Section: Resultsmentioning

confidence: 99%

Heterogeneous Process of Disordering and Structural Refinement in Ni<SUB>3</SUB>Al during Severe Plastic Deformation by High-Pressure Torsion

et al. 2010

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“…When r was 0.0625, r could be seen as Cut point. When q was one positive number and very large, the maximal P ij (r) played a decisive role in Partition Function, when q was one negative number and very small, the minimum P ij (r) played a decisive role in Partition Function [3]. q Fig.…”

Section: Research On the Test Of Ti2alc/tia After Rapid Heat Treatmentmentioning

confidence: 99%

Research of Ti2AlC/TiAl (Nb, B) Composites Based on Multi-Fractal Spectrum

Wen

Yue

Zhang

et al. 2011

MSF

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Spark plasma sintering (SPS) technology was used in-situ to fabricate the Ti2AlC/TiAl (Nb, B) composites. And the composites were treated by rapid heat treatment. which had many advantages, such as heating-up quickly, short holding time and relatively slow cooling. The hidden relationship between images could be reflected by Multi-fractal spectrum, which also could show irregularity apparently. In this paper, the SEM images which fabricated after rapid heat treatment were researched by multifractals. And the parameter was calculated by MATLAB through anglicizing the multi-fractal spectrum theory. There was only small fluctuate between lnχq (r) and lnr when r=0.00625, and lnχq (r) and lnr had well linear relationship in spite of the value of q. After the rapid heat treatment at T=1403 K, the correlation coefficient between τ (q) and q reached 99.99% . The trend of D (q) and q turned to be gently, and the fracture appeared uniformity, and these SEM images were single fractures. τ (q) and q show nonlinear relationship in q∈[-3,-1], and there was one observe steep.The clock shape relationship between the α and f (α) revealed good symmetry of spectrum, wider spectral width, uneven distribution of the fracture, multi-fractal feature clearly, and obvious characteristic of multi-fractal. Key words: multi-fractal spectrum, rapid heating heat treatment, fractal dimension

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“…The MATLAB can analyze the fine structure in handing of the chaotic phenomenon in virtue of the similar principle. It has been widely applied in the analysis of material surface characteristic [5].…”

Section: Computationalmentioning

confidence: 99%

Fractural Research on Ti2AlC/TiAl Compound Materials

Yue

Zhang

et al. 2011

AMR

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The SEM images of Ti2AlC/TiAl materials with different samples showed different fractal dimension.In Multi-fractal spectrum, the parameter is calculated by the multi-fractal spectrum theory. Without r=0.00625, giving rise to the small fluctuate, lnχq(r) and lnr shows the well linear relationship in spite of the value of q. τ (q) and q show nonlinear relationship and the protuberance existed in q∈[-3,-1], D(q) and q turn to be more steep, at last the clock shape relationship between the α and f(α) reveals the good symmetry of spectrum, uneven distribution of the fracture, multi-fractal feature clearly.

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Lattice parameter dependence on long-range ordered degree during order–disorder transformation

Cited by 16 publications

References 17 publications

Heterogeneous Process of Disordering and Structural Refinement in Ni<SUB>3</SUB>Al during Severe Plastic Deformation by High-Pressure Torsion

Heterogeneous Process of Disordering and Structural Refinement in Ni<SUB>3</SUB>Al during Severe Plastic Deformation by High-Pressure Torsion

Research of Ti2AlC/TiAl (Nb, B) Composites Based on Multi-Fractal Spectrum

Fractural Research on Ti2AlC/TiAl Compound Materials

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