SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟Section B%                             %/%

ᕤᴗ⏝⣧࢔࣑ࣝࢽ࣒࢘ྜ㔠࡟࠾ࡅࡿᘬᙇኚᙧ୰ࡢ㌿఩ᐦᗘኚ໬
In-situ ᐃ࡜ῧຍඖ⣲ࡀ㌿఩ቑṪᣲື࡟ཬࡰࡍᙳ㡪In-situ Measurement of the Dislocation Density during Tensile Deformation
for Commercially Pure Aluminum Alloys and Its Changeby the Additional Element.
㊊❧ ኱ᶞ a, ᒸ⏣ ᑗ⚽ b, ୰す ⱥ㈗ b, ⏣୸ ᪼ b
Hiroki Adachia, Masahide Okadaa, Hidetaka Nakanishib, Sho Tamarubaaරᗜ┴❧኱Ꮫ, b㻔ᰴ㻕UACJ
University of Hyogo, bUACJ Corporation⣧࢔࣑ࣝࢽ࣒࢘⣔ྜ㔠ࡢኚᙧ୰ࡢ㌿఩ᐦᗘኚ໬࡟ཬࡰࡍ FeࠊSiࠊMg ᚤ㔞ῧຍࡢᙳ㡪࡜ࠊࡑࡢ↝㕌࡟ࡼࡿᙳ㡪ࢆ In-situ XRD ᐃ࡟ࡼࡾㄪ࡭ࡓࠋMgࠊSi ῧຍᮦࡣᚑ᮶ᮦ࡜ྠᵝ࡟ࠊᅽᘏᮦࡢ↝㕌࡟ࡼࡗ࡚↝㕌㌾໬ࠊᘏᛶࡢྥୖࡀぢࡽࢀࡓࡢ࡟ᑐࡋࠊFe ῧຍᮦ࡛ࡣ↝㕌◳໬ࡋࠊA1200 ྜ㔠࡜ྠᵝ࡟ᘏᛶࡀపୗࡋࡓࠋMgࠊSi ῧຍᮦ࡛ࡣረᛶኚᙧ୰ࡢ㌿఩ᐦᗘࡣ↝㕌࡟ࡼࡗ࡚኱ࡁࡃῶᑡࡋࡓࡀࠊFe ῧຍᮦ࡛ࡣ↝㕌࡟ࡼࡗ࡚ึᮇ㌿఩ᐦᗘࡀ኱ᖜ࡟పୗࡋࡓ࡟ࡶ㛵ࢃࡽࡎࠊረᛶኚᙧ୰ࡢ㌿఩ᐦᗘࡣᅽᘏࡲࡲᮦ࡜ẚ㍑ࡋ࡚࡯࡜ࢇ࡝ኚ໬ࡋ࡞࠿ࡗࡓࠋ
࣮࣮࢟࣡ࢻ㸸⣧࢔࣑ࣝࢽ࣒࢘⣔ྜ㔠ࠊ㌿఩ᐦᗘࠊ↝㕌ࠊIn-situ XRDᐃ⫼ᬒ࡜◊✲┠ⓗ㸸A1200 ྜ㔠ࡣ 1%௨ୗࡢ FeࠊSi ࢆ୙⣧≀࡜ࡋ࡚ྵࡴ⣧ᗘ 99%ࡢ⣧࢔࣑ࣝࢽ࣒࢘⣔ྜ㔠࡛࠶ࡾࠊ⇕ఏᑟᛶࡀⰋࡃࠊᨺ⇕ᛶࡀⰋ࠸ࡇ࡜࠿ࡽࠊ࢚࢔ࢥࣥࡢࣇ࢕ࣥࡸ⮬ື㌴ࡢࣄ࣮ࢺࢩࣥࢩ࣮ࣗࣞࢱ࡞
࡝࡟⏝࠸ࡽࢀ࡚࠸ࡿࠋࡇࢀࡽࡣᅽᘏ࡟ࡼࡾⷧᯈ࡜ࡋࡓᚋ࡟↝㕌ࡋࠊࣉࣞࢫຍᕤ࡟ࡼࡾᡂᙧࡉࢀ࡚࠸ࡿࡀࠊ⌧ᅾࠊⷧ⫗໬࡟ࡼࡿ㍍㔞໬࡜ࢥࢫࢺࢲ࢘ࣥࡀồࡵࡽࢀ࡚࠾ࡾࠊࡑࡢࡓࡵ࡟ࡣྜ㔠ࡢ㧗ᙉᗘ໬ࡀᚲ㡲࡛࠶ࡿࠋࡑࡢࡓࡵ࡟ࡣ↝㕌᫬㛫ࢆ⌧≧ࡼࡾ▷ࡃࡍࡿࡇ࡜ࡀヨࡳࡽࢀࡓࡀࠊ↝㕌᫬㛫ࢆ▷ࡃࡍࡿ࡜ࠊ㝆అⅬ㝆ୗ⌧㇟ࡀⓎ⌧ࡍࡿࡇ࡜࡟ࡼࡾᅽᘏࡲࡲᮦࡼࡾࡶረᛶఙࡧࡀపୗࡍࡿ࡜࠸࠺
㏻ᖖ࡜ࡣ඲ࡃ␗࡞ࡿ⌧㇟ࡀ⏕ࡌࠊ኱ࡁ࡞ၥ㢟࡜࡞ࡗ࡚࠸ࡿࠋ
 ㏻ᖖࡢ࢔࣑ࣝࢽ࣒࢘ྜ㔠ࡣ㐃⥆㝆అࢆ♧ࡋࠊ㝆అⅬ㝆ୗࡣ⏕ࡌ࡞࠸࡜ሗ࿌ࡉࢀ࡚࠸ࡿࡓࡵࠊ㝆
అⅬ㝆ୗⓎ⌧ࡢཎᅉࢆㄪ࡭ࡿࡓࡵࠊ๓ᅇࡢᐇ㦂࡟࠾࠸࡚ In-situ XRD ᐃ࡟ࡼࡾࠊᘬᙇኚᙧ୰ࡢ㌿఩ᐦᗘ ᐃࢆ⾜ࡗࡓ[1, 2]ࠋࡑࡢ⤖ᯝࠊ㌿఩ᐦᗘࡣᅄࡘࡢ㡿ᇦࢆ⤒࡚ኚ໬ࡍࡿࡇ࡜ࡀ᫂ࡽ࠿࡟࡞ࡗࡓࠋ㡿ᇦϨࡣᙎᛶኚᙧ㡿ᇦ࡛࠶ࡾࠊ㌿఩ᐦᗘࡣ࡯࡜ࢇ࡝ቑຍࡋ࡞࠿ࡗࡓࠋ㡿ᇦϩ࡟ධࡿ࡜㌿఩ࡀᛴ⃭࡟ቑṪࡋࠊ㡿ᇦϪ࡟ධࡿ࡜㌿఩ᐦᗘࡢቑຍ㔞ࡀ⦆ࡸ࠿࡟࡞ࡗࡓࠋ㡿ᇦϫ࡛ࡣ◚᩿࡟క࠺ᛂຊపୗ࡟ࡼࡾࠊ㌿఩ᐦᗘࡀᛴ⃭࡟ῶᑡࡋࡓࠋ㝆అⅬ㝆ୗࡣ㡿ᇦϩ࡜Ϫࡢቃ⏺࡟࠾࠸࡚⏕ࡌ࡚࠸ࡓࡇ࡜࠿ࡽࠊ㝆అⅬ㝆ୗ⌧㇟ࡀ⏕ࡌࡿࡼࡾࡶ࠿࡞ࡾప࠸ࡦࡎࡳ㔞࠿ࡽ㌿఩ᐦᗘࡣቑຍࡋ࡚࠸ࡿࡇ࡜ࡀ᫂ࡽ࠿࡟࡞ࡗࡓࠋ㕲㗰࡛ࡣࠊ⁐㉁ඖ⣲ࡀసࡾฟࡍࢥࢵࢺࣞࣝ㞺ᅖẼ࡟ᅛ╔ࡉࢀ࡚࠸ࡿ㌿఩ࡀ㞳⬺ࡍࡿࡇ࡜࡟ࡼࡿྍື㌿఩ࡢᛴ⃭࡞ቑຍࡀ㝆అⅬ㝆ୗࡢཎᅉ࡛࠶ࡿ࡜ゝࢃࢀ࡚࠸ࡿࡀࠊ࢔࣑ࣝࢽ࣒࡛࢘ࡣ␗࡞ࡿ࡜⪃࠼ࡽࢀࡿࠋࡑࡢ୍᪉ࠊ⣧ᗘࡀࡉࡽ࡟㧗࠸ 99.99%⣧࢔࣑ࣝࢽ࣒࡛࢘ࡣྠࡌᕤ⛬࡛స〇ࡋࡓ↝㕌ᮦ࡛ࡶ㝆అⅬ㝆ୗࡣ඲ࡃ⏕ࡌ࡞࠸ࡓࡵࠊࢃࡎ࠿ 1%௨ୗࡢ୙⣧≀ࡀ㝆అⅬ㝆ୗ⌧㇟ࡢⓎ⌧ࢆࡣࡌࡵ࡜ࡍࡿረᛶኚᙧ⌧㇟࡜኱ࡁࡃ㛵ࢃࡗ࡚࠸ࡿ࡜ண᝿ࡉࢀࡿࠋࡼࡗ࡚ࠊᮏᐇ㦂࡛ࡣ୙⣧≀ඖ⣲࡛࠶ࡿ FeࠊSi ࡢῧຍ࡟ࡼࡿᘬᙇኚᙧ୰ࡢ㌿఩ᐦᗘኚ໬ࡢ㐪࠸ࠊࡲࡓࠊ↝㕌࡟ࡼࡿኚ໬ࢆㄪ࡭ࡓࠋࡲࡓࠊẚ㍑࡜ࡋ࡚ࠊ࢔࣑ࣝࢽ࣒࢘ྜ㔠ࡢ௦⾲ⓗ࡞ᅛ⁐ඖ⣲࡛࠶ࡿ Mg ῧຍ࡟ࡼࡿຠᯝ࡟ࡘ࠸࡚ࡶㄪ࡭ࡓࠋᐇ㦂㸸Al-0.5%FeࠊSiࠊ Mg ࢆ㗪㐀ࡋࠊ97%ࡢᅽᘏࢆ᪋ࡋࡓࠋࡇࡢᅽᘏᮦ࡟ 448 K ࡛ 3.6 ks ࡢ↝㕌ࢆ⾜ࡗࡓࠋࡇࢀࡽࡢヨᩱࢆࢦࢽ࣓࣮࢜ࢱୖ࡟タ⨨ࡋࡓ୍㍈ᘬᙇࡾヨ㦂ᶵ࡟ྲྀࡾ௜ࡅࠊ㏱㐣㓄⨨࡟୍ḟඖ᳨ฟჾ MYTHEN ࢆභಶ┤ิ࡟ࡘ࡞ࡆࡓࡶࡢࢆ࢔࣮࣒ୖ䠉㻞㻟㻥䠉SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟

Section B࡟タ⨨ࡋࡓࠋࡦࡎࡳ㏿ᗘ 8.3×10-4 s-1 ࡛ᘬᙇヨ㦂ࢆ⾜࠸࡞ࡀࡽ In-situ X ⥺ᅇᢡᐇ㦂ࢆ⾜࠸ࠊ (111)(200) (220) (311) (222) (420)ࡢ 6 㠃ࡢᅇᢡࣆ࣮ࢡࢆྠ᫬࡟ ᐃࡋࠊ᫬㛫ኚ໬ࢆㄪ࡭ࡓࠋࡇࢀࡽ」ᩘ
ࡢᅇᢡࣆ࣮ࢡࡢゅᗘ, 2T࡜್༙ᖜ, '2T࠿ࡽࠊ(1)ᘧ࡟♧ࡍ Williamson-Hall ἲࢆ⏝࠸ࡿࡇ࡜࡟ࡼࡾ୙
ᆒ㉁ࡦࡎࡳࢆᑟฟࡋࠊ(2)ᘧ࡟ࡼࡾ㌿఩ᐦᗘࢆ⟬ฟࡋࡓ[2, 3, 4]ࠋ
οଶఏ௖௢௦ఏఒൌ଴Ǥଽ஽൅ ʹߝఌ ଶɏ ൌ ͳ͸Ǥͳ ቀ ቁ௕

௦௜௡ఏఒ

(1)
(2)

⤖ᯝ࠾ࡼࡧ⪃ᐹ㸸
ᅗ 1 ࡟ Al-0.5Si ྜ㔠ᅽᘏᮦ࡟࠾ࡅࡿᘬᙇኚᙧ୰ࡢᛂຊࡦࡎࡳ᭤⥺࡜㌿఩ᐦᗘኚ໬ࢆ♧ࡍࠋA1200
ྜ㔠࡜ྠᵝࠊ㌿఩ᐦᗘኚ໬ࡣᅗ୰ࡢ࣮࣐ࣟᩘᏐ࡛♧ࡍ࠸ࡃࡘ࠿ࡢ㡿ᇦ࡟ศࡅࡿࡇ࡜ࡀฟ᮶ࡓࠋ㡿ᇦ I ࡛࠶ࡿᙎᛶኚᙧ㡿ᇦ࡛ࡣ㌿఩ᐦᗘࡣ࡯࡜ࢇ࡝ቑຍࡋ࡞࠿ࡗࡓࡀࠊVI=112 MPa ࡟㐩ࡋࠊ㡿ᇦ II࡟ධࡿ࡜ᛴ⃭࡟ቑຍࡋࡣࡌࡵࡓࠋࡇࡢࡇ࡜࠿ࡽ㌿఩ቑṪ㛤ጞᛂຊࡣVI=112 MPa ࡜ồࡵࡽࢀࡿࠋ㌿
఩ᐦᗘࡀU,,=0.81015 m-2 ⛬ᗘ࡟฿㐩ࡋࠊ㡿ᇦϩ࠿ࡽϪ࡟⛣⾜ࡍࡿ࡜㌿఩ᐦᗘࡢୖ᪼ࡀ⦆ࡸ࠿࡟࡞
ࡗࡓࠋU,,ࡣረᛶኚᙧࡢࡳ࡟ࡼࡗ࡚ኚᙧࡀ㐍⾜ࡍࡿࡓࡵ࡟᭱ప㝈ᚲせ࡞㌿఩ᐦᗘ࡛࠶ࡿ࡜⪃࠼ࡽࢀ࡚࠾ࡾࠊࡇࡢ᫬ࡢᛂຊV,, =179 MPa ࡣືⓗ࡞㝆అᙉᗘ࡛࠶ࡿ࡜ࡳ࡞ࡏࡿ[1]ࠋ㡿ᇦϪ࡟࠾ࡅࡿ㌿఩ᐦᗘࡣ A1200 ྜ㔠ࡢሙྜ࡜ࡣ␗࡞ࡾ኱ࡁࡃୖୗኚືࡋࡓࡀࠊረᛶኚᙧࡢ㐍⾜࡟ࡼࡿቑຍഴྥࡣࡳࡽࢀ࡞࠿ࡗࡓࠋ୍᪉ࠊᅗ 2 ࡼࡾ Al-0.5Si ྜ㔠↝㕌ᮦ࡛ࡣࠊVI=106 MPaࠊU,,=0.451015 m-2 ⛬ᗘࠊV,, =157 MPa ࡜ồࡵࡽࢀࠊࡇࢀࡽࡢ್ࢆ⾲ 1 ࡟ࡲ࡜ࡵࡓࠋ↝㕌࡟ࡼࡗ࡚ࠊ㌿఩ቑṪ㛤ጞᛂຊVI ࡣࡸࡸపୗࠊືⓗ㝆అᛂຊV,,࡜ࡑࡢ᫬ࡢ㌿఩ᐦᗘU,,ࡣ኱ᖜ࡟పୗࡋࠊረᛶఙࡧࡶቑຍࡋࡓࠋࡇࡢ↝㕌㌾໬ᣲືࡣᚑ᮶ྜ㔠࡜ྠᵝ࡛࠶ࡾࠊ↝㕌࡟ࡼࡾᘏᛶࡀపୗࡋࡓ A1200 ྜ㔠࡜ࡣ␗࡞ࡗࡓࠋ

ᅗ 1. Al-0.5Si ྜ㔠ᅽᘏᮦ࡟࠾ࡅࡿᘬᙇ     ᅗ 2. Al-0.5Si ྜ㔠↝㕌ᮦ࡟࠾ࡅࡿᘬᙇኚᙧ୰ࡢᛂຊࡦࡎࡳ᭤⥺࡜㌿఩ᐦᗘኚ໬     ኚᙧ୰ࡢᛂຊࡦࡎࡳ᭤⥺࡜㌿఩ᐦᗘኚ໬
Al-0.5Si ྜ㔠࡛ࡣረᛶኚᙧ᫬࡟࠾ࡅࡿ㌿఩ᐦᗘࡢኚືᖜࡀ㠀ᖖ࡟኱ࡁ࠿ࡗࡓࡓࡵࠊA1200 ྜ㔠ࡢࡼ࠺࡟㡿ᇦϫ࡟࠾ࡅࡿ㌿఩ᐦᗘῶᑡ㡿ᇦࡣ᫂☜࡟ぢࡿࡇ࡜ࡣฟ᮶࡞࠿ࡗࡓࠋ
ᅗ 3 ࡟ Al-0.5Fe ྜ㔠ᅽᘏᮦ࡟࠾ࡅࡿᘬᙇኚᙧ୰ࡢᛂຊࡦࡎࡳ᭤⥺࡜㌿఩ᐦᗘኚ໬ࢆ♧ࡍࠋVI=106MPaࠊU,,=0.71015 m-2ࠊV,, =147 MPa ࡛࠶ࡗࡓࠋ㌿఩ᐦᗘ㌿఩ቑṪ㛤ጞᛂຊVI ࡣ Si ῧຍᮦ࡜኱ࡁ࡞ኚ໬ࡣ࡞࠿ࡗࡓࡀࠊረᛶኚᙧ᫬ࡢ㌿఩ᐦᗘࡀࡸࡸప࠸ࡓࡵࠊືⓗ㝆అᛂຊࡣప࠿ࡗࡓࠋAl-0.5Feྜ㔠↝㕌ᮦ࡛ࡣᅗ 4 ࡟♧ࡍࡼ࠺࡟VI=121 MPaࠊU,,=0.71015 m-2ࠊV,, =163 MPa ࡜ồࡵࡿࡇ࡜ࡀฟ᮶ࠊረᛶఙࡧࡣ↝㕌࡟ࡼࡾపୗࡋࡓࠋ㌿఩ቑṪᛂຊVI ࡜ືⓗ㝆అᛂຊV,,ࡣᅽᘏᮦࡼࡾࡶ㧗ࡃ࡞ࡾࠊ↝㕌◳໬࡜ᘏᛶపୗࡀぢࡽࢀࡓࡇ࡜ࡣ A1200 ྜ㔠࡜ྠᵝ࡛࠶ࡗࡓࠋࡇࡢཎᅉ࡜ࡋ࡚↝㕌࡟ࡼࡗ࡚U,,ࡀῶᑡࡋ࡚࠸࡞࠸ࡇ࡜ࡀཎᅉ࡛࠶ࡿ࡜ࡳࡽࢀࡿࡀࠊU,,ࢆỴᐃࡍࡿᅉᏊࡀఱ࡛࠶ࡿࡢ࠿࡟ࡘ࠸࡚ࡣ⌧≧࡛᫂ࡽ࠿࡛ࡣ࡞࠸ࠋ௨ୖࡢ⤖ᯝ࠿ࡽ A1200 ྜ㔠࡟࠾ࡅࡿ↝㕌࡟క࠺ᘏᛶపୗࡣ Fe ῧຍࡀཎᅉ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋࡲࡓࠊFe ῧຍᮦ࡛ࡣ Si ῧຍᮦࡼࡾࡶረᛶኚᙧ᫬࡟࠾ࡅࡿ㌿఩ᐦᗘࡢኚືᖜࡣᑠࡉ࠿ࡗࡓࡓࡵࠊᅗ 3ࠊᅗ㸲࡟♧ࡍࡼ࠺࡟◚᩿࡟క࠺ᛂຊపୗ࡟క࠺㌿఩ᐦᗘపୗࡀ᫂

䠉㻞㻠㻜䠉SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟

Section B░࡟ࡳࡽࢀࡓࠋࡇࡢ㌿఩ᐦᗘపୗࡣ㝖Ⲵ᫬࡟㌿఩ࡀ⛣ືࡍࡿࡓࡵࠊ཯ᑐࡢࣂ࣮࣮࢞ࢫ࣋ࢡࢺࣝࢆ᭷ࡍࡿ㌿఩ྠኈ࡟ฟ఍࠺ࡇ࡜࡟ࡼࡾᑐᾘ⁛ࡍࡿࠊࡶࡋࡃࡣ⤖ᬗ⢏⏺୰࡬⛣ືࡋᾘ⁛ࡍࡿࡓࡵ࡟⏕ࡌࡿ࡜⪃࠼ࡽࢀ࡚࠸ࡿ[5]ࠋ

ᅗ 3. Al-0.5Fe ྜ㔠ᅽᘏᮦ࡟࠾ࡅࡿᘬᙇ     ᅗ 4. Al-0.5Fe ྜ㔠↝㕌ᮦ࡟࠾ࡅࡿᘬᙇኚᙧ୰ࡢᛂຊࡦࡎࡳ᭤⥺࡜㌿఩ᐦᗘኚ໬     ኚᙧ୰ࡢᛂຊࡦࡎࡳ᭤⥺࡜㌿఩ᐦᗘኚ໬

ᅗ 5㸬Al-0.5Mg ྜ㔠ᅽᘏᮦ࡟࠾ࡅࡿᘬᙇ

ᅗ 6㸬Al-0.5Mg ྜ㔠↝㕌ᮦ࡟࠾ࡅࡿᘬᙇኚᙧ୰ࡢᛂຊࡦࡎࡳ᭤⥺࡜㌿఩ᐦᗘኚ໬

ኚᙧ୰ࡢᛂຊࡦࡎࡳ᭤⥺࡜㌿఩ᐦᗘኚ໬

⾲ 1 Al-0.5SiࠊAl-0.5FeࠊAl-0.5Mg ྜ㔠ᅽᘏᮦࠊ↝㕌ᮦ࡟࠾ࡅࡿ㌿఩ቑṪ㛤ጞᛂຊVIࠊືⓗ㝆అᛂຊVII ࡜ࠊࡑࢀࡽࡢᛂຊ࡟㐩ࡋࡓ᫬ࡢࡦࡎࡳ㔞HI䚸HII ཬࡧረᛶኚᙧ࡟ᚲせ࡞㌿఩ᐦᗘUIIVI / MPa㻌 HI / %㻌 VII / MPa㻌

HII / %㻌 UII / 1015 m-2㻌㻌㻌㻌㻌

Al-0.5Si

ᅽᘏᮦ

112

1.1

179

3.30.80

㻌

↝㕌ᮦ

106

1.1

157

2.6

0.45

Al-0.5Fe

ᅽᘏᮦ

106

1.3

147

3.00.70

㻌

↝㕌ᮦ

121

1.3

163

2.9

0.70

Al-0.5Mg ᅽᘏᮦ

179

2.0

187

3.30.80

㻌

134

1.9

144

2.30.50↝㕌ᮦᅗ 5 ࡟ Al-0.5Mg ྜ㔠ᅽᘏᮦ࡟࠾ࡅࡿᘬᙇኚᙧ୰ࡢᛂຊࡦࡎࡳ᭤⥺࡜㌿఩ᐦᗘኚ໬ࢆ♧ࡍࠋ

VI=179 MPaࠊU,,=0.81015 m-2ࠊV,, =187 MPa ࡛࠶ࡗࡓࠋ㌿఩ቑṪ㛤ጞᛂຊVI ࡣ Si ῧຍᮦ࡜ẚ࡭࡚䠉㻞㻠㻝䠉SPring-8/SACLA ฼⏝◊✲ᡂᯝ㞟Section B㠀ᖖ࡟㧗ࡃ࡞ࡾࠊືⓗ㝆అᛂຊV,,ࡶ㧗࠿ࡗࡓࡀࠊࡑࡢ᫬ࡢ㌿఩ᐦᗘU,,ࡣྠ⛬ᗘ࡛࠶ࡗࡓࠋࡇࡢࡇ࡜࠿ࡽࠊMg ῧຍ࡟ࡼࡾ㌿఩ቑṪ࡟ᚲせ࡞ᛂຊࡣ኱ᖜ࡟ቑຍࡍࡿࡀࠊረᛶኚᙧ࡟ᚲせ࡞㌿఩ᐦᗘࡣ኱ࡁࡃቑຍࡋ࡞࠸ࡓࡵࠊ㡿ᇦϩ࡟࠾ࡅࡿᛂຊቑຍࡀᑠࡉࡃ࡞ࡗࡓ࡜⪃࠼ࡽࢀࡿࠋࡲࡓࠊᅗ 6 ࡟♧ࡍࡼ࠺࡟↝㕌࡟ࡼࡾVI=134 MPaࠊU,,=0.51015 m-2ࠊV,, =144 MPa ࡜࡞ࡾࠊ㌿఩ቑṪ㛤ጞᛂຊ࡜ືⓗ㝆అᛂຊࡣపୗࡋࠊ㌿఩ᐦᗘࡶపୗࡋࡓࠋࡇࢀࡣ Si ῧຍᮦ࡜ྠᵝࡢᣲື࡛࠶
ࡾࠊ㏻ᖖࡢ࢔࣑ࣝࢽ࣒࢘ྜ㔠ࡢ↝㕌࡟ࡼࡿኚ໬࡜ྜ⮴ࡍࡿࠋ㡿ᇦϪ࡟࠾࠸࡚ Si, Fe ῧຍᮦ࡜ẚ㍑
ࡋ࡚ Mg ῧຍᮦ࡛ࡣ㌿఩ᐦᗘࡀᚎࠎ࡟ቑຍࡋࡓࠋࡇࢀࡣ Mg ཎᏊࡀ㌿఩⛣ືࢆᢚไࡋࠊᅇ᚟ࢆᢚไࡋ࡚࠸ࡿࡓࡵ࡛࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋ௒ᚋࡢㄢ㢟㸸 A1200 ྜ㔠࡟࠾࠸࡚↝㕌࡟ࡼࡿᘏᛶపୗࡀ⏕ࡌࡿ≉␗⌧㇟ࡢཎᅉࡣ Fe ཎᏊ࡛࠶ࡾࠊAl-Fe ྜ㔠࡛ࡣረᛶኚᙧࡢࡓࡵ࡟ᚲせ࡞㌿఩ᐦᗘU,,ࡀ↝㕌࡟ࡼࡗ࡚పୗࡋ࡞࠸ࡓࡵ࡛࠶ࡿ࡜ண᝿ࡉࢀࡿࠋࡋ
࠿ࡋ࡞ࡀࡽࠊU,,ࡀ࡝࠺࠸ࡗࡓᅉᏊ࡟ࡼࡗ࡚Ỵᐃࡉࢀ࡚࠸ࡿࡢ࠿࡟ࡘ࠸࡚ࡣ᫂ࡽ࠿࡟࡛ࡁࡎࠊFeࠊ
MgࠊSi ௨እࡢᵝࠎ࡞ඖ⣲ῧຍ࡟ࡼࡿຠᯝࢆㄪ࡭ࠊࡲࡓࠊ⤖ᬗ⢏ᚄ࡞࡝ࡢ௚ࡢᅉᏊ࡟ࡼࡿຠᯝࢆศ㞳ࡋ᳨࡚ウࡍࡿᚲせࡀ࠶ࡿࠋࡋ࠿ࡋ࡞ࡀࡽࠊ↝㕌᫬㛫ࢆ㛗ࡃࡍࡿࡇ࡜࡟ࡼࡗ࡚⤖ᬗ⢏ᚄࢆ⢒኱໬ࡉࡏࡓヨᩱ࡛ࡣ༑ศ࡞ᅇᢡᙉᗘࡀᚓࡽࢀ࡞࠿ࡗࡓࣆ࣮ࢡࡀከࡃࠊ㌿఩ᐦᗘࢆ Williamson-Hall ᘧ࠿ࡽồࡵࡿࡇ࡜ࡀฟ᮶࡞࠿ࡗࡓࠋࡇࢀࡣࠊ⤖ᬗ⢏ࡢ⢒኱໬࡟క࠸ࠊ↷ᑕయ✚ෆ࡟ᅇᢡ᮲௳ࢆ‶ࡓࡍ⤖ᬗ⢏ࡢᩘࡀῶᑡࡋࡓࡇ࡜ࡀཎᅉ࡛࠶ࡾࠊᦂື࡞࡝ࡢᡭẁ࡟ࡼࡗ࡚ᅇᢡ᮲௳ࢆ‶ࡓࡍ⤖ᬗᩘࢆቑࡸࡍᚲせࡀ࠶ࡿ࡜⪃࠼ࡽࢀࡿࠋࡲࡓࠊ≉࡟ Si ῧຍྜ㔠࡟࠾࠸࡚ረᛶኚᙧ᫬ࡢ㌿఩ᐦᗘࡢ኱ᖜ࡞ኚືࡀぢࡽࢀࡓࠋࡇࢀࡣ౑⏝ࡋࡓᘬᙇヨ㦂ᶵ࡛ࡣ∦ഃࡢࢡࣟࢫ࣊ࢵࢻࡀಖᣢࠊ཯ᑐഃࡀ⛣ືࡍࡿࡓࡵࠊ↷ᑕ఩⨨ࡣ᫬㛫࡟ࡼࡾኚ໬ࡍࡿࠋ97%ࡢᙉᅽᘏ࡟ࡼࡗ࡚ࡏࢇ᩿ᖏࡀᑟධࡉࢀࡿ࡞࡝ࡢཎᅉ࡟ࡼࡗ࡚ᚤ⣽⤌⧊ࡀ୙ᆒ୍࡛࠶ࡗࡓ࡜᥎ ࡉࢀࠊࡼࡾṇ☜࡞㌿఩ᐦᗘኚ໬ࡢ ᐃ࡟ࡣᆒ୍࡞ヨᩱࡢస〇ࡀồࡵࡽࢀࡿࠋཧ⪃ᩥ⊩㸸
[1] ㊊❧኱ᶞ ௚ࠊ㍍㔠ᒓᏛ఍➨ 128 ᅇ᫓ᮇ኱఍ㅮ₇ᴫせࠊ247 (2015).
[2] H. Adachi et al., Mater. Trans., 56, 671 (2015).
[3] G. K. Williamson and W. H. Hall, Acta Metall., 1, 22 (1953).
[4] G. K. Williamson and R. E. Smallman, Philos Mag., 1, 34 (1956).
[5] H. Adachi et al., Mater. Trans., 57, 1447 (2016).

(Received: March 8, 2019; Early edition: May 30, 2019,
Accepted: July 16, 2019; Published: August 29, 2019䠉㻞㻠㻞䠉