Zobrazeno 1 - 10
of 322
pro vyhledávání: '"R. B. Helmholdt"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 86:1263-1274
The structure and conformation of allyldicyclopentadienyltitanium(III), (C5H5)2TiC3H5, and of some homologues substituted in the allyl ligand (mainly by methyl groups) have been investigated. Chemical arguments and infrared spectroscopy indicate that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60c386be0fdfedab6ec454d801055f84
https://doi.org/10.1002/recl.19670861113
https://doi.org/10.1002/recl.19670861113
Publikováno v:
Journal of Materials Science. 30:1307-1312
The cold rolling of ultra low carbon steel is a complex process involving the formation of texture and the development of residual stresses. The mechanism for both texture and residual stress development is dislocation multiplication. Both texture an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f13f17681d6e0c19cb362e2874091102
https://doi.org/10.1007/bf00356136
https://doi.org/10.1007/bf00356136
Autor:
Paul Lipinski, B. Pathiraj, G. Ekambaranathan, Krzysztof Wierzbanowski, Andrzej Baczmanski, R. B. Helmholdt
Publikováno v:
Philosophical Magazine A: Physics of Condensed Matter, Defects and Mechanical Properties, 69(3), 437-449. Taylor & Francis
A new method for the determination of residual stresses in plastically deformed polycrystalline materials is presented. This method is based on standard X-ray and neutron diffraction measurements of the 〈d hkl〉 interplanar spacings in different d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85a1f4dc1c335a042cfcee0945f094d1
https://doi.org/10.1080/01418619408242223
https://doi.org/10.1080/01418619408242223
Autor:
W. G. Haije, B. Pathiraj, Krzysztof Wierzbanowski, G. Ekambaranathan, Andrzej Baczmanski, R. B. Helmholdt
Publikováno v:
Crystal Research and Technology. 28:229-243
A systematic review of different types of traditional averages for diffraction elastic constants in textured materials is given. In addition a new type of average, which recently was suggested, is presented. These averages are of vital importance for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ca9c007aed376e8baf362555dbc18b3
https://doi.org/10.1002/crat.2170280217
https://doi.org/10.1002/crat.2170280217
Autor:
F. Maniawski, Krzysztof Wierzbanowski, J. Jura, R. B. Helmholdt, Andrzej Baczmanski, W. G. Haije
Publikováno v:
Philosophical Magazine A. 67:155-171
For polycrystalline materials, only theoretically predicted rotation rate fields (RRFs) have been available up to now. In this work an original method for the determination of the RRF from experimental texture data is proposed. Brass and silver rolli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5358a8c1b430170289383d9883f8475
https://doi.org/10.1080/01418619308207149
https://doi.org/10.1080/01418619308207149
Publikováno v:
Zeitschrift für Kristallographie - Crystalline Materials. 216:295-297
The crystal structure of sodium oxamate, NaC2O3NH2, has been determined from synchrotron powder diffraction data. First Guinier-Johannson photographs have been taken to derive the unit cell. Grid search and Rietveld refinement have been used to deter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e73573dc3f9ba3acc29308ae65afcdd2
https://doi.org/10.1524/zkri.216.5.295.20377
https://doi.org/10.1524/zkri.216.5.295.20377
Publikováno v:
ChemInform. 23
Cristallisation dans Cmcm avec a=3.8268, b=14.3142, c=6.1724A, Z=2; affinement jusqu'a R=4.31%. Autour de Bi, quatre atomes O a courtes distances forment un tetraedre. Cependant, l'occupation de deux de ces positions est mutuellement exclusive, c'est
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0dd7dd3dc1adec1076ef520317b550b9
https://doi.org/10.1002/chin.199246008
https://doi.org/10.1002/chin.199246008
Autor:
D.J.W. IJdo, R. B. Helmholdt
Publikováno v:
ChemInform. 24
Dibarium cerium antimonate, Ba 2 Ce 3/4 -SbO 6 , M r =597.52, tetragonal, I4/mmm. At room temperature, a=8.4562 (1), c=17.0002 (4) A, V=1215.64 (2) A 3 , Z=8, D x =6.5297 (1) Mg m -3 , μR=0.15, λ=2.5717 (1) A, R wp =2.85%. The structure has been re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d71f3b0a0499de93d5a6fafce15fd86b
https://doi.org/10.1002/chin.199327008
https://doi.org/10.1002/chin.199327008
Publikováno v:
Crystal Research and Technology. 27:513-522
A complete set of f.c.c. rolling texture predictions, obtained with the use of a relaxed constraint model, is presented in this paper. The whole spectrum of textures between the copper and brass types can be found if some components of reaction stres
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7feabc918e88f67c61ebd3f1e6045a1c
https://doi.org/10.1002/crat.2170270417
https://doi.org/10.1002/crat.2170270417
Publikováno v:
Zeitschrift für Kristallographie, 214(3), 151-153. De Gruyter
The crystal structure of sodium selenite, Na2SeO3, has been determined from X-ray powder diffraction data. The direct method package POWSIM has been used to determine the structure. The crystal structure is monoclinic, P21/c, Z = 4, a = 4.8963(2) Å,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::060407dd92d4fd72ae0fc1d884e3b2bd
https://doi.org/10.1524/zkri.1999.214.3.151
https://doi.org/10.1524/zkri.1999.214.3.151