Spinodal decomposition existence of the β Ti–Cr binary alloy: computer simulation of the real alloy system and experimental investigations

Mebed, Abdelazim M.; Koyama, Toshiyuki; Miyazaki, T.

doi:10.1016/s0927-0256(98)00124-4

Cited by 12 publications

(8 citation statements)

References 12 publications

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“…Numerous investigators worked on the spinodal decomposition of Ti based alloys [106][107][108][109][110]. In the affirmed papers, mainly Ti-Al, Ti-Cr, TiSi and Ti-V based alloys were studied using transmission electron microscopy, electron diffraction and atom probe field ion microscopy.…”

Section: Spinodal Decomposition In Ti-based Alloysmentioning

confidence: 99%

Improvements in spinodal alloys from past to present

Fındık

2012

Materials & Design

111

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Section: Spinodal Decomposition In Ti-based Alloysmentioning

confidence: 99%

Improvements in spinodal alloys from past to present

Fındık

2012

Materials & Design

111

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“…The second hardening stage, which starts at 50h, showed predominantly brittle fractures, in which it presence of almost cleavage fracture regions is observed, as indicated, by arrows, in Figure 3b. These fracture regions are related with the α' ordinate phases growing, which, in time, tend to line up throughout the directions {100}, [17].…”

Section: Transformation Of the Microstructure From 425 To 475º Cmentioning

confidence: 99%

“…The presence of side strips, resulting from the arrangement of phases due to the spinodal decomposition mechanism, has been observed through diffraction of the selected area through Transmission Electronic Microscopy and X-ray diffraction, [17,18,19].…”

Section: Transformation Of the Microstructure From 425 To 475º Cmentioning

confidence: 99%

Phase transformations evaluation on a UNS S31803 duplex stainless steel based on nondestructive testing

Silva

Albuquerque

Leite

et al. 2009

Materials Science and Engineering: A

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Duplex stainless steel presents special mechanical properties such as, for example, mechanical and corrosion strength, becoming competitive in relation to the other types of stainless steel.One of the great problems of duplex stainless steel microstructural changes study is related to embrittlement above 300ºC, with the precipitation of the α' phase occurring over the ferritic microstructure. Aiming to characterise embrittlement of duplex stainless steel, hardening kinetics, from 425 to 475 o C, was analysed through the speed of sound, Charpy impact energy, X-ray diffraction, hardness and microscopy parameters. The presence of two hardening stages, detected through the speed of sound, was observed, one being of brittle characteristic and the other ductile. Moreover, the speed of sound showed a direct correlation with the material's hardness. Thus, it is concluded that the speed of sound is a promising nondestructive parameter to follow-up embrittlement in duplex stainless steel.

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“…An aspect of Co-Cu systems that has been well studied for the past decades is their mechanisms of phase transition [5][6][7][8][9][10]. These mechanisms are spinodal decomposition [11,12], nucleation-growth [13], and growth by grain boundary diffusion [14].…”

Section: Introductionmentioning

confidence: 99%

Microstructural study and numerical simulation of phase decomposition of heat treated Co–Cu alloys

Mebed

Abd‐Elnaiem

2014

Progress in Natural Science: Materials International

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The influence of heat treatment on the phase decomposition and the grain size of Co-10 at% Cu alloy were studied. Few samples were aged in a furnace for either 3 or 5 h and then quenched in iced water. The materials and phase compositions were investigated using energy dispersive spectrometry and X-ray diffraction techniques. X-ray diffraction analysis showed that the samples contained Co, Cu, CuO, CoCu 2 O 3 , CoCuO 2 phases in different proportions depending on the heat treatment regimes. The formation of dendrite Co phase rendered the spinodal decomposition while the oxidations prevent the initiation of the spinodal decomposition even for a deep long aging inside the miscibility gap. Since the Bragg reflections from different phases of Co-Cu alloy significantly overlap, the crystal structural parameters were refined with FULLPROF program. The shifts in the refined lattice constants (a, b and c), the space group and the grain size were found to be phase-and heat treatment-dependant. Two-dimensional computer simulations were conducted to study the phase decomposition of Co-Cu binary alloy systems. The excess free energy as well as the strain energy, without a priori knowledge of the shape or the position of the new phase, was precisely evaluated. The results indicate that the morphology and the shape of the microstructure agree with SEM observation.

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Spinodal decomposition existence of the β Ti–Cr binary alloy: computer simulation of the real alloy system and experimental investigations

Cited by 12 publications

References 12 publications

Improvements in spinodal alloys from past to present

Improvements in spinodal alloys from past to present

Phase transformations evaluation on a UNS S31803 duplex stainless steel based on nondestructive testing

Microstructural study and numerical simulation of phase decomposition of heat treated Co–Cu alloys

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