✦ LIBER ✦

Deformation mechanism analysis of fcc metals by GPF

✍ Scribed by Xiu-Mei Wei; Jian-Min Zhang; Ke-Wei Xu

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 368 KB
Volume: 486
Category: Article
ISSN: 0921-5093
DOI: 10.1016/j.msea.2007.09.039

No coin nor oath required. For personal study only.

✦ Synopsis

The second nearest-neighbor modified embedded atom method (2NN-MEAM) is used to calculate the generalized planar fault (GPF) energies of the fcc metals Al, Ni and Cu. In this method, the twinning tendency is consistent in the criteria of the γ sf and γ usf /γ utf values, that is, deformation twinning is most preferable in Cu and rarely seen in Al. While full dislocation is easy to be observed in Al for its lowest γ sf /γ usf and highest γ usf /γ utf values. Even in nanomaterials, the relatively low γ usf /γ utf value can be the reason for a more rigorous condition in Al to create a twin than Cu, which is also evidenced in experiments. The GPF energy increases with vertical expansion and the magnitude of the increase is determined by Young's modulus of the metal to a certain extent.

📜 SIMILAR VOLUMES

Deformation by grain rotations in nanocr

Deformation by grain rotations in nanocrystalline fcc-metals

✍ N. Yagi; A. Rikukawa; H. Mizubayashi; H. Tanimoto 📂 Article 📅 2006 🏛 Elsevier Science 🌐 English ⚖ 433 KB

Microstructure and strength of severely

Microstructure and strength of severely deformed fcc metals

✍ J. Gubicza; N.Q. Chinh; T. Csanádi; T.G. Langdon; T. Ungár 📂 Article 📅 2007 🏛 Elsevier Science 🌐 English ⚖ 168 KB

The relationship is examined between the microstructure and the strength of ultrafine-grained fcc metals (Al, Al-Mg alloys, Cu and Ni) processed by severe plastic deformation. The saturation value of the yield strength obtained at high strains is correlated with the dislocation density by using the

Evolution of Structure in Deformed Singl

Evolution of Structure in Deformed Single Crystals of fcc Metals at Heating

✍ C. V. Kopezky; L. S. Kokhantchik 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 748 KB

Deformation stages in a stabilized loadi

Deformation stages in a stabilized loading cycle of fatigued FCC metals (I) experimental results

✍ Dozent Dr. C. Holste; Dr. W. Kleinert; Dr. W. Fischer 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 547 KB

Analysis of the deformation mechanisms i

Analysis of the deformation mechanisms in bulk ultrafine grained metallic materials

✍ I.V. Alexandrov; R.G. Chembarisova; V.D. Sitdikov 📂 Article 📅 2007 🏛 Elsevier Science 🌐 English ⚖ 590 KB

The upgraded Estrin-Tóth dislocation model has been suggested to describe deformation behavior of materials, subjected to severe plastic deformation, which in its turn is realized under high imposed pressure of several GPa. The model was applied to study high pressure torsion of Cu samples. The disl

Deformation mechanisms of nanograined me

Deformation mechanisms of nanograined metallic polycrystals

✍ G. Saada; T. Kruml 📂 Article 📅 2011 🏛 Elsevier Science 🌐 English ⚖ 296 KB

This paper is an attempt to discuss the relevance of the physical concepts used to describe the plastic flow behaviour of a wide class of nanograined metallic polycrystals, by critically analyzing recent experimental observations on nanograined Ni and Cu. The paper focuses on the description of the