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Novel Method for Combined Tension and Shear Loading of Thin-Walled Tubes Read chapter Read first chapter

2015 | OriginalPaper | Chapter

Flow Stress Measurement in Upsetting Test with Grooved Platens

Author : Kozo Osakada

Published in: 60 Excellent Inventions in Metal Forming

Publisher: Springer Berlin Heidelberg

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Abstract

For practical determination of flow stress curve under forming conditions, i.e. at large strains, high strain rates and at elevated temperatures, a method is proposed based on the upsetting test with grooved platens. The procedure of the method is to measure the load and stroke during upsetting test, and transform them to average flow stress and average equivalent strain. This method was proved to be applied up to 700°C with measuring error within ±5% for various metals, and was employed as a standard material testing method for cold forging steels in Japan.

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previous chapter Friction Analysis in Bulk Metal Forming
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Literature
1.
Kudo, H., Sato, K., Sawano, I., 1965, Flow stress test and cold heading pressure of carbon steels. J. Japan Soc. Tech. Plasticity, 6 (56), 491–511. (in Japanese)
2.
Kudo, H., Sato K., Aoi, K., 1968, A cold upsettability test, Annals of CIRP, 28(2), 309–318.
3.
Osakada, K., Kawasaki, T, Mori, K., 1981, A method of determining flow stress under working conditions, Annals of CIRP, 30(1), 135–138.CrossRef
4.
Shiozaki, T., Kawasaki, K., 1986, Data sheets of flow stress and upsettability for carbon steel wire rods, J. Japan Soc. Tech. Plasticity, 27 (304), 568–572, (in Japanese).
5.
Kawasaki, K., Tsuda, O, 1989, Automatic data processing system of flow stress during cold and warm forging, J. Japan Soc. Tech. Plasticity, 30 (343), 1127–1130, (in Japanese).
6.
Tozawa, Y., 1989, Cooperative work on flow stress and ductility of steels for cold forging under forming conditions, J. Japan Soc. Tech. Plasticity, 30 (343), 1127–1130, (in Japanese).
7.
Tozawa, Y., 1989, Flow stress and ductility of steels for cold forging under forming conditions [data], J. Japan Soc. Tech. Plasticity, 30 (343), 1131–1135, (in Japanese).
Metadata
Title
Flow Stress Measurement in Upsetting Test with Grooved Platens
Author
Kozo Osakada
Copyright Year
2015
Publisher
Springer Berlin Heidelberg
Book
60 Excellent Inventions in Metal Forming

Print ISBN: 978-3-662-46311-6

Electronic ISBN: 978-3-662-46312-3

Copyright Year: 2015

DOI
https://doi.org/10.1007/978-3-662-46312-3_5

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