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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 191 to 200 of 4561 (0.047 seconds)Spelling suggestions: "subject:"metallurgy."" "subject:"etallurgy.""
| 191 |
Experimental work involving the substitution of manganese for iron in copper mattesPotter, George Michael, 1914- January 1936 (has links)
No description available.
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| 192 |
Die load and stresses in press forgingBalogun, Sannibo A. January 1971 (has links)
Several axi-symmetric EN3B steel components differing in shape and size were forged on a 100 ton joint knuckle press. A load cell fitted under the lower die inserts recorded the total deformation forces. Job parameters were measured off the billets and the forged parts. Slug temperatures were varied and two lubricants - aqueous colloidal graphite and oil - were used. An industrial study was also conducted to check the results of the laboratory experiments. Loads were measured (with calibrated extensometers attached to the press frames) when adequately heated mild steel slugs were being forged in finishing dies. Geometric parameters relating to the jobs and the dies were obtained from works drawings. All the variables considered in the laboratory study could not, however, be investigated without disrupting production. In spite of this obvious limitation, the study confirmed that parting area is the most significant geometric factor influencing the forging load. Multiple regression analyses of the laboratory and industrial results showed that die loads increase significantly with the weights and parting areas of press forged components, and with the width to thickness ratios of the flashes formed, but diminish with increasing slug temperatures and higher billet diameter to height ratios. The analyses also showed that more complicated parts require greater loads to forge them. Die stresses, due to applied axial loads, were investigated by the photoelastic method. The three dimensional frozen stress technique was employed. Model dies were machined from cast araldite cylinders, and the slug material was simulated with plasticene. Test samples were cut from the centres of the dies after the stress freezing. Examination of the samples, and subsequent calculations, showed that the highest stresses were developed in die outer corners. This observation partly explains why corner cracking occurs frequently in industrial forging dies. Investigation of die contact during the forging operation revealed the development of very high stresses.
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| 193 |
Electrodeposited cobalt alloy coatings and their use on hot forging diesStill, Frank A. January 1974 (has links)
No description available.
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| 194 |
The effect of microstructure on failure strain in plastic deformation of low carbon steelNuri, Nuri Sabir M. January 1977 (has links)
No description available.
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| 195 |
The mechanical properties of fibre reinforced composite platesAnderson, R. S. January 1975 (has links)
No description available.
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| 196 |
A fundamental study of surface protection by powder coatingGökemre, Brenda January 1979 (has links)
No description available.
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| 197 |
The toughness of a hot work die steelBayliss, Rex N. January 1974 (has links)
No description available.
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| 198 |
Failure mechanisms in pressurised fibre wound tubesSpencer, Brian January 1976 (has links)
No description available.
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| 199 |
Hot rolling of iron powderTorabi, Abbas January 1977 (has links)
No description available.
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| 200 |
High strength iron compacts containing carbon, copper and tinSmith, Paul January 1974 (has links)
No description available.
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