Title:
METHOD FOR MEASURING YIELD STRENGTH OF 3D PRINTING METAL MEMBER BY USING MAGNETIC INCREMENTAL PERMEABILITY, AND MEASURING SYSTEM THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/003325
Kind Code:
A1
Abstract:
A method and a system for non-destructively measuring the yield strength of a metal member by using magnetic incremental permeability are disclosed. A quasi-static excitation magnetic field is generated using an electromagnet and applied to enter and exit through two points of a metal material to be measured, and at the same time, a small alternating magnetic field is generated through an excitation coil and applied to the metal material to be measured. The intensity of the quasi-static excitation magnetic field applied to the inside of the metal material to be measured is measured using a Hall sensor. The magnetic field induced from the magnetized metal material to be measured is detected using a sensing coil. Reversible magnetic permeability (MIP) of the metal material to be measured is obtained using an output signal of the Hall sensor and a detection signal of the sensing coil. The particle size of the metal material to be measured is obtained from the correlation between the obtained reversible magnetic permeability and the particle size of the metal material to be measured, and the yield strength of the metal material to be measured is calculated using the obtained particle size. The particle size and yield strength of the metal material to be measured can be measured non-destructively.
Inventors:
SOHN HOON (KR)
LIM HYUNG JIN (KR)
LEE JONGSU (KR)
LIM HYUNG JIN (KR)
LEE JONGSU (KR)
Application Number:
PCT/KR2022/010538
Publication Date:
January 26, 2023
Filing Date:
July 19, 2022
Export Citation:
Assignee:
KOREA ADVANCED INST SCI & TECH (KR)
International Classes:
G01N27/83; G01B11/02; G01N27/90; G01N27/92
Foreign References:
| KR20100003808A | 2010-01-12 | |||
| KR20140019160A | 2014-02-14 | |||
| KR20100108034A | 2010-10-06 |
Other References:
GUPTA BHAAWAN, UCHIMOTO TETSUYA, DUCHARNE BENJAMIN, SEBALD GAEL, MIYAZAKI TAKAMICHI, TAKAGI TOSHIYUKI: "Magnetic incremental permeability non-destructive evaluation of 12 Cr-Mo-W-V steel creep test samples with varied ageing levels and thermal treatments", NDT&E INTERNATIONAL, ELSEVIER, AMSTERDAM, NL, vol. 104, 1 June 2019 (2019-06-01), AMSTERDAM, NL , pages 42 - 50, XP093026297, ISSN: 0963-8695, DOI: 10.1016/j.ndteint.2019.03.006
LI KAIYU; LI LEI; WANG PING; LIU JIAQI; SHI YU; ZHEN YANG; DONG SHIYUN: "A fast and non-destructive method to evaluate yield strength of cold-rolled steel via incremental permeability", JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, ELSEVIER, AMSTERDAM, NL, vol. 498, 4 November 2019 (2019-11-04), AMSTERDAM, NL , XP086034579, ISSN: 0304-8853, DOI: 10.1016/j.jmmm.2019.166087
LI KAIYU; LI LEI; WANG PING; LIU JIAQI; SHI YU; ZHEN YANG; DONG SHIYUN: "A fast and non-destructive method to evaluate yield strength of cold-rolled steel via incremental permeability", JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, ELSEVIER, AMSTERDAM, NL, vol. 498, 4 November 2019 (2019-11-04), AMSTERDAM, NL , XP086034579, ISSN: 0304-8853, DOI: 10.1016/j.jmmm.2019.166087
Attorney, Agent or Firm:
PARK, Young-woo (KR)
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