Title:
MAGNESIUM-BASED WROUGHT ALLOY MATERIAL AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/013226
Kind Code:
A1
Abstract:
Addition of multiple solute elements can create a fracture origin through the formation of an intermetallic compound due to bonding of the added elements. It is preferable to find, while maintaining a microstructure for activating non-basal dislocation movement, additive elements that do not create a fracture origin and have the effect of promoting grain boundary sliding from among inexpensive and versatile elements. Provided is a Mg-based wrought alloy material which has excellent room-temperature ductility and contains two or more elements out of a set consisting of Mn, Zr, Bi, and Sn, the remainder of said alloy material comprising Mg and incidental impurities, and which is characterized in that: the mean grain size of the matrix thereof is 20 µm or smaller; a stress-strain curve obtained by a tension-compression test of the wrought material returns a (σmax-σbk)/ σmax value, that is, the relationship between maximum load stress (σmax) and breaking stress (σbk), of 0.2 or higher in each instance; the resistance value to fracture is 200 kJ or higher; and the grain size in Mg parent phase becomes refined during room-temperature deformation.
Inventors:
SOMEKAWA HIDETOSHI (JP)
OSAWA YOSHIAKI (JP)
OSAWA YOSHIAKI (JP)
Application Number:
PCT/JP2018/026096
Publication Date:
January 17, 2019
Filing Date:
July 10, 2018
Export Citation:
Assignee:
NAT INST MATERIALS SCIENCE (JP)
International Classes:
C22C23/00; C22F1/06; C22F1/00
Domestic Patent References:
| WO2017154969A1 | 2017-09-14 | |||
| WO2013180122A1 | 2013-12-05 |
Foreign References:
| US20160168678A1 | 2016-06-16 | |||
| US3063834A | 1962-11-13 | |||
| US3071462A | 1963-01-01 | |||
| CN102813966A | 2012-12-12 | |||
| CN102877014A | 2013-01-16 | |||
| JP2008214668A | 2008-09-18 | |||
| JP2006016658A | 2006-01-19 | |||
| JP2016017183A | 2016-02-01 | |||
| JP2016089228A | 2016-05-23 |
Other References:
J. KOIKE ET AL., ACTA MATER, vol. 51, 2003, pages 2055
See also references of EP 3653742A4
See also references of EP 3653742A4
Attorney, Agent or Firm:
AIKAWA, Toshihiko (JP)
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