http://support.spring8.or.jp/Report_JSR/PDF_JSR_31A/2019A1807.pdf

2019A1807BL46XUඃࢀࡓᙉᗘ࣭ᘏᛶࣂࣛࣥࢫࢆᣢࡘ SCM440 㗰࡜ Ti-17 ྜ㔠ࡢຍᕤ◳໬ᣲືࡢ In-situ ゎᯒIn-situ Analysis on Work Hardening Behavior of SCM440 Steel and Ti-17
Alloy with Excellent Strength – Ductility Balance㫽ሯ ྐ㑻, ఀᮾ ⠜ᚿ
Shiro Torizuka and Atsushi Itoරᗜ┴❧኱Ꮫ኱Ꮫ㝔The Graduate School of Engineering, University of Hyogoඃࢀࡓᙉᗘ࣭ᘏᛶࣂࣛࣥࢫࢆᣢࡘ SCM440 㗰࡜ Ti-17 ྜ㔠ࡢຍᕤ◳໬ᣲືࢆゎᯒࡍࡿࡓࡵ࡟ࠊᘬᙇヨ㦂ࡑࡢሙ㏱㐣 X ⥺ᅇᢡࢆ⾜ࡗࡓࠊᘬᙇᙉࡉ 2 GPa ⣭ࡢ㉸㧗ᙉᗘᮦᩱ SCM440 㗰ࢆᑐ㇟࡟ࡋ࡚ࠊ࣐ࣝࢸࣥࢧ࢖ࢺ⤌⧊ࡢຍᕤ◳໬⬟࡟↔Ⅼࢆ࠶࡚ࠊຍᕤ◳໬⬟ࠊ㌿఩ᐦᗘࡢୖ㝈ࡸࡑࡢቑຍᣲືࢆ᫂ࡽ࠿࡟ࡋࡓࠋ࣮࣮࢟࣡ࢻ㸸 ࣇࣞࢵࢩ࣐ࣗࣝࢸࣥࢧ࢖ࢺࠊṧ␃࣮࢜ࢫࢸࢼ࢖ࢺࠊ㉸ᚤ⣽⤌⧊ࠊᘬᙇヨ㦂ࠊࡑࡢሙ㏱㐣 X ⥺ᅇᢡࠊᙉᗘࠊᘏᛶࠊຍᕤㄏ㉳ኚែ⫼ᬒ࡜◊✲┠ⓗ㸸ᵓ㐀⏝㔠ᒓᮦᩱࡢᅜ㝿➇தຊࡣࠊࡑࡢᅜࡢ⏘ᴗ඲యࡢ➇தຊࢆᕥྑࡍࡿ࡜࠸ࡗ࡚ࡶ㐣ゝ࡛ࡣ࡞࠸ࠋᙉ࠸⣲ᮦ⏘ᴗࡀ࠶ࡿ࠿ࡽࡇࡑࠊᙉ࠸⮬ື㌴⏘ᴗࡀ࠶ࡾࠊ⯟✵ᶵ⏘ᴗࠊᶵᲔ⏘ᴗࡀ࠶ࡿࠋ≉࡟⮬ື㌴⏝ࣁ࢖ࢸࣥ 㧗ᙉᗘ㗰ᯈ ࡣࠊ⮬ື㌴⏘ᴗࡢ➇தຊࡢ᰿ᖿࢆ࡞ࡍᢏ⾡࡛࠶ࡿࠋࡲࡓࠊTi ྜ㔠ࡣ௒ᚋࡢ᪥ᮏࡢ⯟✵ᶵ⏘ᴗࢆᨭ࠼ࡿᮦᩱ࡜࡞ࡿࠋ ࡋ࠿ࡋࠊ㧗ᙉᗘ࡛࠶ࡾࠊఙࡧࡶ኱ࡁࡃࠊ㠎ᛶࡶ㧗࠸࡜࠸࠺ඃࢀࡓࢺ࣮ࢱࣝࣂࣛࣥࢫࢆᣢࡗࡓ㔠ᒓᮦᩱࠊ࠸ࢃࡺࡿ㠉᪂ⓗ࡞㔠ᒓᮦᩱࡣᏑᅾࡋ࡞࠸ࠋࡑࢀࡣࠊࡇࢀࡽࡢᛶ㉁ࡀࢺ࣮ࣞࢻ࢜ࣇࡢ㛵ಀ࡟࠶ࡿ࠿ࡽ࡛࠶ࡿࠋࡍ࡞ࢃࡕࠊᘬᙇᙉࡉࢆୖࡆࢀࡤࠊఙࡧࡸ㠌ᛶࡣపୗࡋ࡚ࡋࡲ࠺ࠋࡇࡢࢺ࣮ࣞࢻ࢜ࣇࡢ㛵ಀࢆᡴ◚ࡋࠊ㠉᪂ⓗᵓ㐀ᮦᩱࢆᐇ⌧ࡍࡿࡇ࡜ࢆ┠ᶆ࡜ࡋ࡚ࠊᡃࠎࡣᅜᐙࣉࣟࢪ࢙ࢡࢺ㸦⏘Ꮫඹ๰ᇶ♏ᇶ┙◊✲ࣉࣟࢢ࣒ࣛ ࣊ࢸࣟᵓ㐀ไᚚ㸧ࢆ᥎㐍ࡋ࡚ࡁࡓࠋࡲࡓࠊ⌧ᅾ࡛ࡣ㹑㹇㹎㸦ᡓ␎ⓗ࢖ࣀ࣮࣋ࢩࣙࣥ๰㐀ࣉࣟࢢ࣒ࣛ㸧ࣉࣟࢪ࢙ࢡࢺࢆ᥎㐍୰࡛࠶ࡿࠋࡑࡢᡂᯝ࡜ࡋ࡚ࠊ0.1%C2%Si-5%Mn ⤌ᡂࢆ࣮࣋ࢫ࡜ࡋࡓ࣐ࣝࢸࣥࢧ࢖ࢺ⤌⧊࠾ࡼࡧࣇ࢙ࣛ࢖ࢺ㸩࣮࢜ࢫࢸࢼ࢖ࢺ஧┦⤌⧊ࢆᚓࡓࠋ࣐ࣝࢸࣥࢧ࢖ࢺ⤌⧊ᘬᙇᙉࡉ 1400 MPa ⣭࡛㧗ᘏᛶ࡜㧗㠌ᛶࡶྠ᫬࡟㐩ᡂ࡛ࡁࡿྍ⬟ᛶࢆᣢࡘࠋࣇ࢙ࣛ࢖ࢺ㸩࣮࢜ࢫࢸࢼ࢖ࢺ஧┦⤌⧊ࡣࠊᘬᙇᙉࡉࡣ 1200 MPa ࣞ࣋ࣝࡔࡀࠊ30%ࢆ㉸࠼ࡿ኱ࡁ࡞୍ᵝఙࡧ࡜ᒁ㒊ఙࡧࢆేࡏᣢࡘࠋᘬᙇᙉࡉ඲ఙࡧࣂࣛࣥࢫࡣࠊ30000 MPa%ࢆ㉸࠼ࠊ᪤Ꮡ㗰࡟ẚ࡭ᴟࡵ࡚ඃࢀ࡚࠸ࡿ[1-5]ࠋࡇࢀࡽࡢඃࢀࡓຊᏛⓗ≉ᛶⓎ⌧࣓࢝ࢽࢬ࣒ࢆ SPring-8 ࡢᨺᑕගࢆ⏝࠸࡚ゎ᫂ࡋ࡚ࡁࡓࠋ㠉᪂ⓗᵓ㐀ᮦᩱ㛤Ⓨࡢษࡾཱྀࢆぢ࠸ࡔࡋࠊḟୡ௦⮬ື㌴⏝ࣁ࢖ࢸࣥࡸ⯟✵ᶵ⏝ Ti ྜ㔠ࡢ㛤Ⓨ࡟ࡘ࡞ࡆࡘࡘ࠶ࡿࠋ
௒ᅇࠊᘬᙇᙉࡉ 2 GPa ⣭ࡢ㉸㧗ᙉᗘᮦᩱࢆᑐ㇟࡟ࡋࡓࠋSCM440 㗰ࡣࠊC ῧຍ㔞ࢆ 0.4%࡛ࠊMnῧຍ㔞ࡣ 0.6%࡜ప࠸ࡀࠊCr ࢆ 1.1%, Mo ࢆ 0.18%ྵࡴ㗰࡛ࠊ࣐ࣝࢸࣥࢧ࢖ࢺ⤌⧊࡛ᘬᙇᙉࡉ 2 GPa⣭ᴟࡵ࡚㧗࠸ᙉᗘࢆ᭷ࡍࡿࠋࡲࡓࠊ௒ᅇࡣ࣐ࣝࢸࣥࢧ࢖ࢺ⤌⧊ࡢຍᕤ◳໬⬟࡟↔Ⅼࢆ࠶࡚ࡿࠋ࣐ࣝࢸࣥࢧ࢖ࢺ⤌⧊ࢆᚤ⣽࡜⢒኱࡟సࡾศࡅࠊຍᕤ◳໬⬟ࠊ㌿఩ᐦᗘࡢୖ㝈ࡸࡑࡢቑຍᣲືࢆ᫂ࡽ࠿࡟ࡍࡿࠋ ࡲࡓࠊ⯟✵ᶵ࢚ࣥࢪࣥᮦᩱ࡛࠶ࡿ Ti-17 ྜ㔠ࡢᘬᙇヨ㦂୰ࡢ㌿఩ᐦᗘኚ໬ࡢ ᐃࡶヨࡳࡿࠋᘬᙇヨ㦂ࢆ⾜࠸࡞ࡀࡽ X ⥺ᅇᢡࢆ⾜࠸ࠊ㌿఩ᐦᗘࡢቑຍࢆࢲ࢖ࢼ࣑ࢵࢡ࡟࡜ࡽ࠼ࡓ࠸ࠋ
ᐇ㦂㸸ᮦᩱࡣ SCM440 㗰࠾ࡼࡧ Ti ྜ㔠࡛࠶ࡾࠊࡑࡢ⤌ᡂࡣࠊFe-0.4C-0.3Si-0.6Mn-0.1Ni-1.12Cr-0.18Mo
࡛࠶ࡿࠋTi-17 ྜ㔠ࡢ⤌ᡂࡣ Ti-5Al-2Zr-2Sn-4Mo-4Cr ࡛࠶ࡿࠋSCM440 㗰࡟㛵ࡋ࡚ࡣࠊ኱Ꮫ࡟࠾࠸
࡚⇕ฎ⌮ࢆ⾜࠸࣐ࣝࢸࣥࢧ࢖ࢺ⤌⧊ࢆᚤ⣽ࠊ⢒኱࡜ 2 ✀㢮సࡾศࡅࡓࠋ2 ȝmࠊ100 ȝm ⤌⧊࡜ࡍࡿࠋ
Ti-17 ྜ㔠࡟㛵ࡋ࡚ࡣࠊ㘫㐀⣲ᮦࢆࡑࡢࡲࡲ⏝࠸ࡓࠋ䠉㻝㻟㻡䠉 ᘬᙇヨ㦂∦ヨᩱࡣᖹ⾜㒊㛗ࡉ 12 mm, ᖜ 2.5 mm, ཌࡉ 0.4 mm ࡢᘬᙇヨ㦂∦࡛ࠊFig.1 ࡟♧ࡍࡼ
࠺࡟ࠊBL46XU ࡢࢦࢽ࣓࣮࢜ࢱୖ࡟タ⨨ࡋࡓᘬᙇࡾヨ㦂ᶵ࡟ྲྀࡾ௜ࡅࡓࠋ1 ḟඖ༙ᑟయ᳨ฟჾMynthen ࢆ⏝࠸ࡿࠋ᳨ฟჾࡢ఩⨨ࡣࠊ㕲ࡢሙྜࠊ2ș ࡀ 5-35rࡢ⠊ᅖ࡛ィ ࡛ࡁࡿࡼ࠺࡟ࠊ㐺ษ࡞఩⨨࡟タ⨨ࡋࡓࠋ
 X ⥺ࡢ࢚ࢿࣝࢠ࣮ࡣ 30 keV ࡜ࡋࡓࠋᮦᩱࡣ㕲㗰ᮦᩱ࡛࠶ࡿࡀᯈཌ 0.5 mm ࡛࠶ࢀࡤ༑ศ࡞ᅇᢡ
ᙉᗘࡀᚓࡽࢀࡓࠋᘬᙇ㏿ᗘࡣࡦࡎࡳ㏿ᗘ 0.26 mm/min࡜࡞ࡿࡼ࠺࡟⾜ࡗࡓࠋᘬᙇⲴ㔜ࡢ ᐃ࡟ࡣࠊ᭱኱Ⲵ㔜
20 N ࡢ࣮ࣟࢻࢭࣝࢆ⏝࠸ࡿࠋࡲࡓࠊCCD ࣓࢝ࣛࢆᣢ
ࡕ㎸ࡳࠊヨ㦂∦ࡢఙࡧࢆ┤᥋ィ ࡋࡓࠋほᐹࡍࡿ X ⥺ࡢࣆ࣮ࢡࡣ㕲ࡢሙྜࠊࣇ࢙ࣛ࢖ࢺ┦࡛
䠄110䠅ࠊ䠄200䠅ࠊ䠄211䠅ࠊ䠄220䠅ࠊ䠄310䠅ࠊ䠄321䠅ࡢྛ㠃࡜࣮࢜ࢫࢸࢼ࢖ࢺ┦࡛ࡣࠊ䠄111䠅ࠊ䠄200䠅ࠊ䠄220䠅ࠊ䠄311䠅ࠊ䠄222䠅࡛࠶ࡿࠋ1 ḟඖ᳨ฟჾ Mynthen ࢆ⏝࠸࡚ࠊᘬᙇヨ㦂ࢆ⾜࠸࡞ࡀࡽ X ⥺ᅇᢡࢆྠ᫬࡟⾜࠺ࠊIn-situ ᘬᙇヨ㦂 X ⥺ᅇᢡࢆ⾜ࡗࡓࠋᛂຊ̿ࡦࡎࡳ᭤⥺ࢆྲྀᚓࡋ࡞ࡀࡽࠊᛂຊ̿ࡦࡎࡳ᭤⥺࡟ᑐᛂࡍࡿ X ⥺ᅇᢡࢹ࣮ࢱࢆᚓ
ࡓࠋࢹ࣮ࢱࡢ ᐃ㛫㝸ࡣࠊ1 s ⛬ᗘ࡜ࡍࡿࠋᚓࡽࢀࡓࢹ
࣮ࢱࢆࡶ࡜࡟ࠊࡲࡓࠊ್༙ᖜࡼࡾࠊಟṇ Williamson-Hallἲࢆ⏝࠸࡚㌿఩ᐦᗘ࠾ࡼࡧ㌿఩㓄ิࢆ♧ࡍಀᩘ M ࢆồࡵࡓࠋࡇࡢ࡜ࡁࠊ㔜せ࡞ࡢࡣࠊ㗰ࡢሙྜࠊࣇ࢙ࣛ࢖
ࢺࡢ㧗ゅഃࡢ 3 ᮏࡢࣆ࣮ࢡ䠄220䠅ࠊ䠄310䠅ࠊ䠄321䠅࡛ࠊ≉࡟㔜せ࡞ࡢࡣ䠄321䠅࡛࠶ࡾࠊ㧗࠸ࣆ࣮ࢡᙉᗘࡀᚲせFig.1 Schematic illustration of the insitu transmission type X-ray࡛࠶ࡿࠋࣆ࣮ࢡᙉᗘࡀప࠸࡜ࠊಟṇ Williamson Hall ἲ
diffraction suring tensile testࢆᵓᡂࡍࡿࣃ࣓࣮ࣛࢱ࣮࡛࠶ࡿ Chkl ࡸ q ࡜࠸ࡗࡓࢥsystem [4].
ࣥࢺࣛࢫࢺࣇ࢓ࢡࢱ࣮ࡢ⟬ฟࡢㄗᕪࡀ኱ࡁࡃ࡞ࡿࠋṇ☜࡞㌿఩ᐦᗘࡸ㌿఩㓄ิࡢ⟬ฟ࡟ࡣࠊ㧗ゅഃࡢࣆ࣮ࢡ࡟༑ศ࡞ᙉᗘࡀᚲせ࡛࠶ࡿࠋ⤖ᯝ࠾ࡼࡧ⪃ᐹ㸸
SCM440 㗰࡟࠾࠸࡚ࠊ࣮࢜ࢫࢸࢼ࢖ࢺ⢏ᚄࢆ 115 ȝm ࠿ࡽ 13 ȝm ࡲ࡛ᚤ⣽࡟ࡍࡿࡇ࡜࡛ࠊຍᕤ◳໬⬟ࡀ኱ᖜ࡟ྥୖࡋࡓࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋ⌧ᅾࠊಟṇ Williamson Hall ἲࢆ⏝࠸࡚ࠊ㌿఩ᐦᗘኚ໬
ࢆゎᯒ୰࡛࠶ࡿࠋ௒ᚋࡢㄢ㢟㸸 ಟṇ Williamson Hall ἲࢆ⏝࠸࡚ࠊ㌿఩ᐦᗘኚ໬ࢆゎᯒ୰ࢆ㐍ࡵࡿࠋཧ⪃ᩥ⊩㸸
[1] 㫽ሯྐ㑻ࡽ,ᖹᡂ 29 ᖺᗘ SPring-8 ⏘ᴗ᪂ศ㔝ᨭ᥼ㄢ㢟୍࣭⯡ㄢ㢟㸦⏘ᴗศ㔝㸧ᐇ᪋ሗ࿌᭩㸦2017B㸧
ࠊ
2017B1934.
[2] 㫽ሯྐ㑻ࡽ,ᖹᡂ 27 ᖺᗘ SPring-8 ⏘ᴗ᪂ศ㔝ᨭ᥼ㄢ㢟୍࣭⯡ㄢ㢟㸦⏘ᴗศ㔝㸧ᐇ᪋ሗ࿌᭩
㸦2015A㸧ࠊ2015A1847.
[3] ๓⏣᫭ᏹ, 㫽ሯྐ㑻, ㊊❧኱ᶞ, ⮬ື㌴ᢏ⾡఍ㄽᩥ㞟 49, 856 㻔2018㻕.
[4] Ᏻ㐩⠇ᒎ, 㫽ሯྐ㑻, ㊊❧኱ᶞ, ఀᮾ⠜ᚿ, 㕲࡜㗰, 105, 197 㻔2019㻕.
[5] ⵿⏣࿴ᶞ, ㊊❧኱ᶞ, 㫽ሯྐ㑻,CAMPS-ISIJ 31-2, PS-99 㻔2018㻕.

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