Zobrazeno 1 - 10
of 259
pro vyhledávání: '"John P. Hirth"'
Publikováno v:
Materials Research Letters, Vol 5, Iss 7, Pp 449-464 (2017)
A controversy concerning the description of $ \{ \bar 1012\} $ $ \langle 10\bar 11\rangle $ twinning, whether it is shear-shuffle or pure glide-shuffle or pure shuffle, has developed. There is disagreement about the interpretation of transmission ele
Externí odkaz:
https://doaj.org/article/0ebfb18216a34e8db734c42094bbe5c4
Publikováno v:
Proceedings of the National Academy of Sciences. 120
Type II and IV twins with irrational twin boundaries are studied by high-resolution transmission electron microscopy in two plagioclase crystals. The twin boundaries in these and in NiTi are found to relax to form rational facets separated by disconn
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America. 119(13)
Significance Historically, two types of twins (I and II) have been categorized for twinning in minerals and metals. When analyzed by the topological model, a crystallographic construction used to define the defect structure of interfaces, triclinic a
Publikováno v:
Proc Natl Acad Sci U S A
A different type of defect, the coherency disclination, is added to disclination types. Disconnections that include disclination content are considered. A criterion is suggested to distinguish disconnections with dislocation content from those with d
Autor:
John P. Hirth
Publikováno v:
Journal of Engineering Materials and Technology. 144
Throughout his career, Zbib was innovative, originating models in seminal papers that anticipated areas of subsequent increased interest. These include strain-gradient plasticity, discrete dislocation dynamics, multiscale modeling, arrays of Somiglia
Publikováno v:
Acta Materialia. 131:574-593
A two-dimensional plane strain elastic solution is determined for the Cottrell solute atmosphere around an edge dislocation in an infinitely long cylinder of finite radius (the matrix), in which rows of solutes are represented by cylindrical rods wit
Publikováno v:
Wave Motion. 69:A1-A8
Jens Lothe, Professor Emeritus of Physics at the University of Oslo, passed away at age 84 on September 26, 2016 after a brief illness. This article presents a survey of his life, work, and influence from the standpoints of four authors who had the g
Autor:
John P. Hirth
Publikováno v:
Philosophical Magazine. 94:3162-3169
A recent paper criticized the standard treatment of Cottrell atmospheres, relevant to solid-solution hardening. We show that the treatment in current texts is correct within the standard assumptions of dislocation theory. Nonlinear treatments of the
Publikováno v:
Acta Materialia. 57:3763-3770
Deformation twins are often observed to meet each other to form multi-fold twins in nanostructured face-centered cubic (fcc) metals. Here we propose two types of mechanism for the nucleation and growth of four different single and multiple twins. The
Publikováno v:
Metallurgical and Materials Transactions A. 33:2541-2547
Some central problems in understanding the similarities of and the differences between ledgewise martensitic and ledgewise diffusional growth are examined. Martensitic growth can be described in terms of a lattic correspondence and a plane undistorte