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1 Izod, Edwin Gilbert
SUBJECT AREA: Metallurgy[br]b. 17 July 1876 Portsmouth, Englandd. 2 October 1946 England[br]English engineer who devised the notched-bar impact test named after him.[br]After a general education at Vickery's School at Southsea, Izod (who pronounced his name Izzod, not Izod) started his career as a premium apprentice at the works of Maudslay, Sons and Field at Lambeth in January 1893. When in 1995 he was engaged in the installation of machinery in HMS Renown at Pembroke, he gained some notoriety for his temerity in ordering Rear Admiral J.A.Fisher, who had no pass, out of the main engine room. He subsequently worked at Portsmouth Dockyard where the battleships Caesar and Gladiator were being engined by Maudslay's. From 1898 to 1900 Izod worked as a Demonstrator in the laboratories of University College London, and he was then engaged by Captain H. Riall Sankey as his Personal Assistant at the Rugby works of Willans and Robinson. Soon after going to Rugby, Izod was asked by Sankey to examine a failed gun barrel and try to ascertain why it burst in testing. Conventional mechanical testing did not reveal any significant differences in the properties of good and bad material. Izod found, however, that, when specimens from the burst barrel were notched, gripped in a vice, and then struck with a hammer they broke in a brittle manner, whereas sounder material merely bent plastically. From these findings his well-known notched-bar impact test emerged. His address to the British Association in September 1903 described the test and his testing machine, and was subsequently published in Engineering. Izod never claimed any priority for this method of test, and generously acknowledged his predecessors in this field, Swedenborg, Fremont, Arnold and Bent Russell. The Izod Test was rapidly adopted by the English-speaking world, although Izod himself, being a busy man, did little to publicize his work, which was introduced to the engineering world largely through the efforts of Captain Sankey. Izod became Assistant Managing Director at Willans, and in 1910 was appointed Chief Consulting Mechanical and Electrical Engineer to the Central Mining Corporation at Johannesburg. He became Managing Director of the Rand Mines in 1918, and returned to the UK in 1927 to become the Managing Director of Weymann Motor Bodies Ltd of Addlestone. As Chairman of this company he extended its activitiesconsiderably.[br]Principal Honours and DistinctionsMBE. Member of the Iron and Steel Institute.Further Reading1903, "Testing brittleness of steel", Engineering (25 September): 431–2.ASD -
2 młot lzoda do prób udarnościowych
• Izod machineSłownik polsko-angielski dla inżynierów > młot lzoda do prób udarnościowych
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3 udarnościomierz lzoda
• Izod machineSłownik polsko-angielski dla inżynierów > udarnościomierz lzoda
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4 копёр Изода
1) Engineering: Izod impact testing machine2) Construction: Izod impact machine, Izod machine, impact machine -
5 копёр для ударных испытаний
Construction: Izod machine, impact machineУниверсальный русско-английский словарь > копёр для ударных испытаний
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6 копер для ударных испытаний
Construction: Izod machine, impact machineУниверсальный русско-английский словарь > копер для ударных испытаний
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7 копёр для ударных испытаний по Изоду
Engineering: Izod machineУниверсальный русско-английский словарь > копёр для ударных испытаний по Изоду
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8 маятниковый копёр для испытания на удар по Изоду
Polymers: Izod machineУниверсальный русско-английский словарь > маятниковый копёр для испытания на удар по Изоду
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9 маятниковый копер для испытания на удар по Изоду
Polymers: Izod machineУниверсальный русско-английский словарь > маятниковый копер для испытания на удар по Изоду
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10 чук на Изод
izod impact machine -
11 Charpy, Augustin Georges Albert
SUBJECT AREA: Metallurgy[br]b. 1 September 1865 Ouillins, Rhône, Franced. 25 November 1945 Paris, France[br]French metallurgist, originator of the Charpy pendulum impact method of testing metals.[br]After graduating in chemistry from the Ecole Polytechnique in 1887, Charpy continued to work there on the physical chemistry of solutions for his doctorate. He joined the Laboratoire d'Artillerie de la Marine in 1892 and began to study the structure and mechanical properties of various steels in relation to their previous heat treatment. His first memoir, on the mechanical properties of steels quenched from various temperatures, was published in 1892 on the advice of Henri Le Chatelier. He joined the Compagnie de Chatillon Commentry Fourchamboult et Decazeville at their steelworks in Imphy in 1898, shortly after the discovery of Invar by G.E. Guillaume. Most of the alloys required for this investigation had been prepared at Imphy, and their laboratories were therefore well equipped with sensitive and refined dilatometric facilities. Charpy and his colleague L.Grenet utilized this technique in many of their earlier investigations, which were largely concerned with the transformation points of steel. He began to study the magnetic characteristics of silicon steels in 1902, shortly after their use as transformer laminations had first been proposed by Hadfield and his colleagues in 1900. Charpy was the first to show that the magnetic hysteresis of these alloys decreased rapidly as their grain size increased.The first details of Charpy's pendulum impact testing machine were published in 1901, about two years before Izod read his paper to the British Association. As with Izod's machine, the energy of fracture was measured by the retardation of the pendulum. Charpy's test pieces, however, unlike those of Izod, were in the form of centrally notched beams, freely supported at each end against rigid anvils. This arrangement, it was believed, transmitted less energy to the frame of the machine and allowed the energy of fracture to be more accurately measured. In practice, however, the blow of the pendulum in the Charpy test caused visible distortion in the specimen as a whole. Both tests were still widely used in the 1990s.In 1920 Charpy left Imphy to become Director-General of the Compagnie des Aciéries de la Marine et Homecourt. After his election to the Académie des Sciences in 1918, he came to be associated with Floris Osmond and Henri Le Chatelier as one of the founders of the "French School of Physical Metallurgy". Around the turn of the century he had contributed much to the development of the metallurgical microscope and had helped to introduce the Chatelier thermocouple into the laboratory and to industry. He also popularized the use of platinum-wound resistance furnaces for laboratory purposes. After 1920 his industrial responsibilities increased greatly, although he continued to devote much of his time to teaching at the Ecole Supérieure des Mines in Paris, and at the Ecole Polytechnique. His first book, Leçons de Chimie (1892, Paris), was written at the beginning of his career, in association with H.Gautier. His last, Notions élémentaires de sidérurgie (1946, Paris), with P.Pingault as co-author, was published posthumously.[br]BibliographyCharpy published important metallurgical papers in Comptes rendus… Académie des Sciences, Paris.Further ReadingR.Barthélémy, 1947, "Notice sur la vie et l'oeuvre de Georges Charpy", Notices et discours, Académie des Sciences, Paris (June).M.Caullery, 1945, "Annonce du décès de M.G. Charpy" Comptes rendus Académie des Sciences, Paris 221:677.P.G.Bastien, 1963, "Microscopic metallurgy in France prior to 1920", Sorby Centennial Symposium on the History of Metallurgy, AIME Metallurgical Society Conference Vol.27, pp. 171–88.ASDBiographical history of technology > Charpy, Augustin Georges Albert
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12 маятниковый копёр для ударных испытаний образцов по методу изода
Metallurgy: Izod impact testing machineУниверсальный русско-английский словарь > маятниковый копёр для ударных испытаний образцов по методу изода
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13 маятниковый копёр изода
Metallurgy: Izod impact testing machineУниверсальный русско-английский словарь > маятниковый копёр изода
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