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1. (WO2017149785) METHOD OF VISUALIZING AUSTENITE PHASE IN MULTIPHASE STEEL AND MULTIPHASE STEEL SPECIMEN FOR MICROSTRUCTURE OBSERVATION
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2017/149785 International Application No.: PCT/JP2016/057259
Publication Date: 08.09.2017 International Filing Date: 02.03.2016
IPC:
G01N 23/225 (2006.01) ,G01N 23/20 (2006.01) ,G01N 23/203 (2006.01) ,G01N 23/22 (2006.01)
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
23
Investigating or analysing materials by the use of wave or particle radiation not covered by group G01N21/ or G01N22/159
22
by measuring secondary emission
225
using electron or ion microprobe
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
23
Investigating or analysing materials by the use of wave or particle radiation not covered by group G01N21/ or G01N22/159
20
by using diffraction of the radiation, e.g. for investigating crystal structure; by using reflection of the radiation
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
23
Investigating or analysing materials by the use of wave or particle radiation not covered by group G01N21/ or G01N22/159
20
by using diffraction of the radiation, e.g. for investigating crystal structure; by using reflection of the radiation
203
by measuring back scattering
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
23
Investigating or analysing materials by the use of wave or particle radiation not covered by group G01N21/ or G01N22/159
22
by measuring secondary emission
Applicants:
JFE STEEL CORPORATION [JP/JP]; 2-3, Uchisaiwai-cho 2-chome, Chiyoda-ku, Tokyo 1000011, JP
Inventors:
MIKMEKOVA, Sarka; JP
TSUKIORI, Daisuke; JP
TANAKA, Yuji; JP
Agent:
SUGIMURA, Kenji; 36F, Kasumigaseki Common Gate West, 3-2-1, Kasumigaseki, Chiyoda-ku, Tokyo 1000013, JP
Priority Data:
Title (EN) METHOD OF VISUALIZING AUSTENITE PHASE IN MULTIPHASE STEEL AND MULTIPHASE STEEL SPECIMEN FOR MICROSTRUCTURE OBSERVATION
(FR) PROCÉDÉ DE VISUALISATION DE PHASE AUSTÉNITIQUE DANS UN ACIER À PHASES MULTIPLES ET ÉCHANTILLON D'ACIER À PHASES MULTIPLES DESTINÉ À UNE OBSERVATION DE MICROSTRUCTURE
Abstract:
(EN) A method of visualizing an austenite phase in a multiphase steel capable of identifying the austenite phase in the multiphase steel at the nanoscale is provided. The method includes the steps of: a) electro-polishing a surface of a specimen of a multiphase steel in an electrolyte solution containing a corrosive acid and an organic solvent to form a native oxide layer on the surface of the specimen, b) after completion of the electro-polishing, continuously retaining the specimen in the electrolyte solution to form a corrosion product layer selectively only on a domain of the native oxide layer covering an austenite phase, and c) subjecting the surface of the specimen to scanning electron microscopy observation and providing a contrast between the corrosion product layer and remaining surface to visualize the austenite phase as a darkest area.
(FR) L'invention concerne un procédé de visualisation d'une phase austénitique dans un acier à phases multiples, apte à identifier la phase austénitique dans l'acier à phases multiples à l'échelle nanométrique. Le procédé comprend les étapes consistant : a) à effectuer un électro-polissage d'une surface d'un échantillon d'un acier à phases multiples dans une solution électrolytique contenant un acide corrosif et un solvant organique pour former une couche d'oxyde natif sur la surface de l'échantillon, b) après l'achèvement de l'électro-polissage, à continuer de maintenir l'échantillon dans la solution électrolytique pour former une couche de produit de corrosion uniquement sélectivement sur un domaine de la couche d'oxyde natif recouvrant une phase austénitique, et c) à soumettre la surface de l'échantillon à une observation en microscopie électronique à balayage et à fournir un contraste entre la couche de produit de corrosion et la surface restante pour visualiser la phase austénitique comme étant la zone la plus sombre.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)