Effects of interfacial stress in phase field approach for martensitic phase transformation in NiAl shape memory alloys

Roy, Arunabha M.

doi:10.1007/s00339-020-03742-9

Cited by 28 publications

(8 citation statements)

References 67 publications

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“…Fiber-modified cement clay is a special material mixed with fiber, cement, coastal soft clay and water, which has complex chemical composition. Under complex conditions, such as normal maintenance and freeze-thaw cycle, the process of strength development and internal structure change may be accompanied by complex phase transformation [47,48]. It is a new idea to study the mechanical properties of fiber-reinforced cement clay with phase transformation theory.…”

Section: Discussionmentioning

confidence: 99%

Unconfined Compressive Properties of Fiber-Stabilized Coastal Cement Clay Subjected to Freeze–Thaw Cycles

Zhu

Zhang

et al. 2021

JMSE

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This study aimed to investigate the feasibility of using polypropylene fiber-cement-stabilized coastal clay as base-course material or foundation material for city sustainable development by assessing its mechanical performance. The influence of the number of freeze–thaw cycles and curing ages on the mechanical properties of ordinary cemented clay (OCC) and polypropylene fiber-cemented clay (PCC) was investigated by using unconfined compressive test. The experimental results show that the addition of fiber with 1% content can increase the strength as well as the ductility of cemented clay by 12.5% and 15.6%, respectively. The strength of PCC and OCC at 22d age was 1.5 times than at 7d age. Under differently timed freeze–thaw cycles, the mechanical performance of PCC is improved, and, better than that, OCC improves by 11.8% in strength, 16.5% in strain and by 5% in degree of damage, indicating that fiber can improve the freeze–thaw resistance of cemented clay. The frost resistance of PCC and OCC increases with the increase in curing age. Finally, the variation of strength of OCC was explained through the change of micro-structure while the strength enhancing mechanism of polypropylene fiber for cemented clay was also revealed.

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Section: Discussionmentioning

confidence: 99%

Unconfined Compressive Properties of Fiber-Stabilized Coastal Cement Clay Subjected to Freeze–Thaw Cycles

Zhu

Zhang

et al. 2021

JMSE

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“…Different shape memory alloys exhibit martensitic PTs and form different interesting and non-trivial nanostructure during PT due to stress and temperature. [9][10][11][12][13][14] For stress-induced martensitic PT, the material interface experiences biaxial tension of magnitude of the surface energy. However, it is difficult to characterize such interface as material parameters in general at the interface are unknown for heterogonous nature of the interface.…”

Section: Short Communicationmentioning

confidence: 99%

“…[15][16][17][18] Such interface stress has also been introduced in multiphase PF theory for generalized n phases [19][20][21] as well as martensitic PTs. [15][16][17][18] The PF theory in, [11][12][13][14] formulated in polar coordinate system, requires single order parameter to capture martensite-martensite PT and twinning.…”

Section: Short Communicationmentioning

confidence: 99%

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Evolution of Martensitic Nanostructure in NiAl Alloys: Tip Splitting and Bending

Roy

2020

Mat. Sci. Res. India

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A phase-field (PF) model for the phase transformation (PT) between austenite and martensite and twinning between two martensite is presented where PT is described by a single order parameter. Such a description helps us to obtain the analytical solution of interface energetics and kinetics. PF-elasticity problems are solved for cubic-to-tetragonal PT in NiAl. The stress and temperature-induced PT and corresponding twinning and growth of the martensitic phase inside a nanocrystal are simulated. It reproduces nontrivial experimentally observed nanostructure such as splitting and bending of martensitic nanostructure as well as twins crossing. The evolution and morphology of such interesting nanostructures are discussed.

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“…Combined with our recent results as Al [67], FeNi [68], AlNi [69], Ni 1−x Fe x [70], Ni 1−x Cu x [71], Ni [72,73], these results show that the transition temperature (T m ) of Ni material; T m is always proportional with atom number (N), N −1/3 [74,75], and the electronic structure of AuCu [76] and AgAu [77]. The phase transition of Ni material can be determined by stress or temperature [78][79][80][81], and the bonding length of Ni-Ni determined by the experimental method is r = 2.43 Å [82], while the simulation method of Dung, N.T is r = 2.45 Å [73], and P.H. Kien is r = 2.52 Å [72].…”

Section: Introductionmentioning

confidence: 99%

The Structure and Crystallizing Process of NiAu Alloy: A Molecular Dynamics Simulation Method

2021

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This paper studies the influence of factors such as heating rate, atomic number, temperature, and annealing time on the structure and the crystallization process of NiAu alloy. Increasing the heating rate leads to the moving process from the crystalline state to the amorphous state; increasing the temperature (T) also leads to a changing process into the liquid state; when the atomic number (N), and t increase, it leads to an increased crystalline process. As a result, the dependence between size (l) and atomic number (N), the total energy of the system (Etot) with N as l~N−1/3, and −Etot always creates a linear function of N, glass temperature (Tg) of the NiAu alloy, which is Tg = 600 K. During the study, the number of the structural units was determined by the Common Neighborhood Analysis (CNA) method, radial distribution function (RDF), size (l), and Etot. The result shows that the influencing factors to the structure of NiAu alloy are considerable.

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Effects of interfacial stress in phase field approach for martensitic phase transformation in NiAl shape memory alloys

Cited by 28 publications

References 67 publications

Unconfined Compressive Properties of Fiber-Stabilized Coastal Cement Clay Subjected to Freeze–Thaw Cycles

Unconfined Compressive Properties of Fiber-Stabilized Coastal Cement Clay Subjected to Freeze–Thaw Cycles

Evolution of Martensitic Nanostructure in NiAl Alloys: Tip Splitting and Bending

The Structure and Crystallizing Process of NiAu Alloy: A Molecular Dynamics Simulation Method

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