Zobrazeno 1 - 10
of 25
pro vyhledávání: '"V. R. Howes"'
Autor:
V. R. Howes
Publikováno v:
Journal of Materials Science. 26:75-81
A Rockwell superficial hardness tester has been used to continuously monitor hardness under load with time. An analysis of the Rockwell test, that showed the relationship between the measured parameters and the on-load hardness and elastic recovery h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ede48c08daff93b182b89a16229240c1
https://doi.org/10.1007/bf00576035
https://doi.org/10.1007/bf00576035
Autor:
V. R. Howes, P. Wall
Publikováno v:
Journal of Applied Polymer Science. 34:1125-1133
A simple microhardness testing technique is described that enables the identation process to be continuously observed for transparent materials Photographic recording gave measurements of the indentation area and its changes with time, both during th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::edb82047b9000e6effc020baae44165a
https://doi.org/10.1002/app.1987.070340321
https://doi.org/10.1002/app.1987.070340321
Autor:
V. R. Howes, Brian R. Lawn
Publikováno v:
Journal of Materials Science. 16:2745-2752
The mechanics of hardness indentation are considered. On the basis of a cycle in which the loading is elastic-plastic and the unloading (and subsequent reloading) elastic, an expression is derived for the relative depth recovery of the impression as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f7ba9947d90f9d9680203cfc0de0f52
https://doi.org/10.1007/bf02402837
https://doi.org/10.1007/bf02402837
Publikováno v:
Journal of Physics E: Scientific Instruments. 20:1507-1510
A new method for determining the hardness of electrically conducting materials is described. A pyramidal diamond indenter is partly coated with a conducting layer, the region around the tip being left uncoated. In use, the load on the indenter is gra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65ce46f36d77b129b0d644b3ec48958f
https://doi.org/10.1088/0022-3735/20/12/018
https://doi.org/10.1088/0022-3735/20/12/018
Publikováno v:
Journal of Applied Polymer Science. 26:3623-3631
Allyl diglycol carbonate (CR39)® is a thermosetting polymer of interest both as an ophthalmic material and as a material intermediate between brittle and ductile solids. The response to impact in the crack-threshold range has been studied and compar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1c34dd88db3d065fac8ff0536b23eec
https://doi.org/10.1002/app.1981.070261110
https://doi.org/10.1002/app.1981.070261110
Autor:
Kevin Randall Stewart, Matthew R. Callstrom, George M. Whitesides, V. R. Howes, L. M. Scarmoutzos, Thomas X. Neenan
Publikováno v:
Macromolecules. 21:3525-3528
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad9b6a55ae7e78e9f69a615f3f6f76ac
https://doi.org/10.1021/ma00190a033
https://doi.org/10.1021/ma00190a033
Publikováno v:
Journal of Materials Science. 21:1423-1428
Studies have been made of the electrical resistance at the contact between a silicon carbide indenter and various metals. It has been found that reproducible results can be obtained if the contact under load is subjected to a low-energy condenser dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64e5ade5a6dd6286c3fbe1a3c6d4a49c
https://doi.org/10.1007/bf00553283
https://doi.org/10.1007/bf00553283
Autor:
V R Howes
Publikováno v:
Proceedings of the Physical Society. 74:616-624
Results of step height measurements of layer structures on electro-deposits, on a copper single crystal surface with orientation close to a (100) plane, are shown by frequency distribution curves for increasing deposition times. Platelet layer width
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c35c0569e5b5d78fed7b4c9ede8d2c9
https://doi.org/10.1088/0370-1328/74/5/315
https://doi.org/10.1088/0370-1328/74/5/315
Autor:
S Tolansky, V R Howes
Publikováno v:
Proceedings of the Physical Society. Section B. 70:521-526
In extension of earlier studies on the production of percussion marks on diamond surface using a diamond sphere as indenter, it is now found that much softer materials than diamond can be used to produce pressure crack figures on diamond surfaces. Tu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d23d64deb4a908783176374798812c6
https://doi.org/10.1088/0370-1301/70/5/309
https://doi.org/10.1088/0370-1301/70/5/309
Autor:
V. R. Howes, Samuel Tolansky
Publikováno v:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 230:294-301
The study of pressure figures on diamond is extended to the cubic and dodecahedral faces. The formation of cracks on a sawn but unpolished dodecahedral (two-point) face is first studied. The loads required for the initiation of cracks, using a diamon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d08cc060ef08ba11d5e6f06296d311d
https://doi.org/10.1098/rspa.1955.0132
https://doi.org/10.1098/rspa.1955.0132