Edge-to-edge matching of lattice planes and coupling of crystallography and migration mechanisms of planar interfaces

Nie, Jian Feng

doi:10.1007/s11661-006-0057-3

Cited by 17 publications

(4 citation statements)

References 67 publications

(75 reference statements)

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“…The migration of this interface in its normal direction seems to involve the formation and later gliding of moire´ledges within the interface plane. [32,33] These observations suggest the existence of commensurate matching of 1 " 100 À Á a and 0 " 33 À Á b planes [29,33,34] in the major facet interface, and of 10 " is the near closest-packed plane in the magnesium lattice, suggests that the major and minor side facets of each b plate have relatively low interfacial energies.…”

Section: Precipitationmentioning

confidence: 91%

“…However, one possible approach may involve consideration of phase equilibria and lattice matching of magnesium and precipitate structures. [33,253,254] The precipitate phase may be selected from the equilibrium or near equilibrium phases that form via reactions among magnesium and/or added alloying elements. These phases are expected to be intrinsically strong and, therefore, more resistant to shearing and plastic deformation.…”

Section: Microstructural Design For Higher Strengthmentioning

confidence: 99%

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Precipitation and Hardening in Magnesium Alloys

Nie

2012

Metall Mater Trans A

1,396

519

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Magnesium alloys have received an increasing interest in the past 12 years for potential applications in the automotive, aircraft, aerospace, and electronic industries. Many of these alloys are strong because of solid-state precipitates that are produced by an age-hardening process. Although some strength improvements of existing magnesium alloys have been made and some novel alloys with improved strength have been developed, the strength level that has been achieved so far is still substantially lower than that obtained in counterpart aluminum alloys. Further improvements in the alloy strength require a better understanding of the structure, morphology, orientation of precipitates, effects of precipitate morphology, and orientation on the strengthening and microstructural factors that are important in controlling the nucleation and growth of these precipitates. In this review, precipitation in most precipitation-hardenable magnesium alloys is reviewed, and its relationship with strengthening is examined. It is demonstrated that the precipitation phenomena in these alloys, especially in the very early stage of the precipitation process, are still far from being well understood, and many fundamental issues remain unsolved even after some extensive and concerted efforts made in the past 12 years. The challenges associated with precipitation hardening and age hardening are identified and discussed, and guidelines are outlined for the rational design and development of higher strength, and ultimately ultrahigh strength, magnesium alloys via precipitation hardening.

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Section: Precipitationmentioning

confidence: 91%

Section: Microstructural Design For Higher Strengthmentioning

confidence: 99%

Precipitation and Hardening in Magnesium Alloys

Nie

2012

Metall Mater Trans A

1,396

519

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“…In the present work, we developed an Al and Fe interface model using a face-to-face matching technique [6,7], where two planes of Al (001) and Fe (0-11) gave the minimum lattice misfit along the [100] and [010] directions. According to our knowledge, nobody has studied Al/Fe interface structures and their characteristics, so these simulations will provide grounds and deem to act as reference for further investigation of this system.…”

Section: Introductionmentioning

confidence: 99%

A First-Principles Study of the Al (001)/Fe(0-11) Interface

Friis

Ninive²,

Marthinsen

et al. 2018

MSF

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Using a first-principles methodology we have investigated the interfacial and bonding characteristics of the Al(001)/Fe (0-11) interface. The Al/Fe interface model was developed using a face-to-face matching method. Among many possible interface structures, the Al (001)/ Fe(0-11) orientation relation gave the minimum lattice misfit along the a and b directions (a=b= -0.47%). Hence, this interface structure provided the minimum energy value and was used for this study. To predict the interface strength and stability, the work of separation and interfacial energy were calculated. Here, all systems were calculated under exactly the same conditions (k-point mesh, cutoff energy, lateral lattice strain etc). In order to predict the bonding nature at the interface, charge density difference plot was evaluated, which showed charge gain at the interface. The aim of this study is to describe the adhesive behavior between Al and Fe, provide some insights about strength and stability of this interface structure for galling, and provide reference interface system for Al/Fe welding.

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“…The enhanced heat transfer due to the applied pressure increases the cooling rate, which reduces the grain size according to Yong et al [9] and El-khair [10] . Several experimental studies have been performed to gain comprehensive understanding of the morphology and structure of the β phase, and the orientation relationship with the hexagonal close packed (hcp) matrix [11,12] . The β phase is a stoichiometric intermetallic compound with a composition of Mg 17 Al 12 and an α-Mn-type cubic unit cell structure.…”

Section: Introductionmentioning

confidence: 99%