䝘䝜䜲䞁䝕䞁䝔䞊䝅䝵䞁䜢⏝䛔䛯ᚤᑠ㡿ᇦゎᯒ䛾 㕲㗰ᮦᩱ䜈䛾ᛂ⏝ 㕲㗰 Keyword : Nano indentation test䚸AFM䚸ᚤᑠ㡿ᇦ䛾ᶵᲔⓗᛶ㉁ ⊂❧⾜ᨻἲே㻌 ≀㉁ ⊂❧⾜ᨻἲே ≀㉁䞉ᮦᩱ◊✲ᶵᵓ ᮦᩱ ✲ᶵᵓ ᄂᆮỉ Ꮡ 㕲㗰ศ㔝䛻䛚䛡䜛ᚤ⣽⤌⧊ไᚚ䛺䛹䛾ᢏ⾡㛤Ⓨ䛻䜘䜚䚸ᚤᑠ㡿ᇦ䛾ᶵᲔⓗᛶ㉁䜢▱䜛ᚲ せ䛜㧗䜎䜚䛴䛴䛒䜛䚹䛣䛾䜘䛖䛺ᚤᑠ㡿ᇦ䛻䛚䛡䜛ᶵᲔⓗᛶ㉁ホ౯ἲ䛾୍䛴䛻䝘䝜䜲䞁䝕䞁 䝔䞊䝅䝵䞁ヨ㦂䛜䛒䜛䚹 ᄂᆮỉ ཀྵẟ 㧗⢭ᗘ䛾◳䛥 ᐃ⨨Ỵ䜑ᶵ⬟䜢᭷䛩䜛䝘䝜䜲䞁䝕䞁䝔䞊䝅䝵䞁ヨ㦂ᶵ䛻䜘䜚䚸ᚤᑠ㡿ᇦ䛾 ᶵᲔⓗᛶ㉁䜢ホ౯䛩䜛䚹 இέᇢᄂᆮἚἦἕἁἋ 䝘䝜䜲䞁䝕䞁䝔䞊䝅䝵䞁ヨ㦂䛻䜘䜛䜽䝸䞊䝥⑂ປ䛧䛯䝣䜵䝷䜲䝖⣔⪏⇕㗰䛾ᶵᲔⓗᛶ㉁䛾ホ౯ ヨᩱ䠖12Cr-2W㻌 䝏䝳䞊䝤ᮦ䚸䜽䝸䞊䝥⑂ປヨ㦂◚᩿ᮦ䠄◚᩿⧞䜚㏉䛧ᩘ309ᅇ䠅 䜽䝸䞊䝥⑂ປヨ㦂᮲௳䠖ヨ㦂 ᗘ650Υ䚸䜂䛪䜏ᖜᘬᙇᅽ⦰2.0䠂䚸ᘬᙇഃ1.0䠂䜂䛪䜏ಖᣢྎᙧἼ䚸 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 䜂䛪䜏ಖᣢ㛫3㛫 &^ Coarse 1 ` subgrain fine ` subgrains |$ AFM image ૨ᴾ ྂᴾ 1 䜽䝸䞊䝥⑂ປヨ㦂䛻䜘䜚䚸ᪧ䜸䞊䝇 䜽䝸䞊䝥⑂ປヨ㦂䛻䜘䜚䚸ᪧ䜸䞊䝇 䝔䝘䜲䝖⢏⏺㏆ഐ䛻⢒䝃䝤䜾 䝔䝘䜲䝖()⢏⏺㏆ഐ䛻⢒䝃䝤䜾 䝺䜲䞁䛜ᙧᡂ䛥䜜䜛䚹 䝺䜲䞁䛜ᙧᡂ䛥䜜䜛䚹 after & Creep-fatigue test ⢒䝃䝤䝤䝺䜲䞁ෆ䛷䛾ᢲ䛧㎸䜏 ⢒䝃䝤䝤䝺䜲䞁ෆ䛷䛾ᢲ䛧㎸䜏 ヨ㦂1䛿䚸ᢲ䛧㎸䜏䛾ึᮇ䛻^ ヨ㦂1䛿䚸ᢲ䛧㎸䜏䛾ึᮇ䛻pop-in ⌧㇟䛜ほᐹ䛥䜜䚸㌿ᐦᗘ䛜䛝䜟 ⌧㇟䛜ほᐹ䛥䜜䚸㌿ᐦᗘ䛜䛝䜟 < ^ 䜑䛶ప䛔䛣䛸䛜᥎ᐃ䛥䜜䜛䚹୍᪉䚸 䜑䛶ప䛔䛣䛸䛜᥎ᐃ䛥䜜䜛䚹୍᪉䚸 pop-in ᚤ⣽䝃䝤䜾䝺䜲䞁ෆ䛷䛾ᢲ䛧㎸䜏 ᚤ⣽䝃䝤䜾䝺䜲䞁ෆ䛷䛾ᢲ䛧㎸䜏 ヨ㦂2䛿䚸ᢲ䛧㎸䜏῝䛥䛜ὸ䛟䚸 ヨ㦂2䛿䚸ᢲ䛧㎸䜏῝䛥䛜ὸ䛟䚸 ^⌧㇟䛿ぢ䜙䜜䛺䛔䚹 pop-in⌧㇟䛿ぢ䜙䜜䛺䛔䚹 䛣䜜䜙䛾⤖ᯝ䛛䜙䚸ᪧ⢏⏺㏆ഐ < 㻌 䛣䜜䜙䛾⤖ᯝ䛛䜙䚸ᪧ?⢏⏺㏆ഐ 䛷⢒䛧䛯䝃䝤䜾䝺䜲䞁䛿㌿ 䛷⢒䛧䛯䝃䝤䜾䝺䜲䞁䛿㌿ K K 䛾ᅇ䛜㢧ⴭ䛷䛒䜛䛣䛸䛜᫂䜙䛛 䛾ᅇ䛜㢧ⴭ䛷䛒䜛䛣䛸䛜᫂䜙䛛 $ F-h depth curve 䛸䛺䛳䛯䚹 䛸䛺䛳䛯䚹 ) )ȣ ȣ ^ Prior Ȗ grain `^ boundary 12Cr-2W(pipe) & 㻌 Nobuo NAGASHIMA, Masao HAYAKAWA and Megumi KIMURA, “Characterization of Mechanical properties for creep-fatigued ferritic heat-resisting steel by nano-indentation”, Procedia Materials Science 3(2014), pp.2006-2010 JSPS⛉◊㈝ 23560110㻌 LJƱNJ ܱဇ҄ƷႸ z㻌 12Cr-2W䝏䝳䞊䝤ᮦ䛿䜽䝸䞊䝥⑂ປヨ㦂䛻䜘䜚ᪧ ⢏⏺䛻⢒䝃䝤䜾䝺䜲䞁䛜ᙧᡂ䛥䜜䜛 z㻌 ⢒䝃䝤䜾䝺䜲䞁䛿䚸㌿䛾ᅇ䛜㢧ⴭ䛷䛒䜛 z㻌 ᚋ䚸ᶵჾ䛾䛥䜙䛺䜛㧗ᗘ䛻క䛔䚸ᚤᑠ㡿ᇦ䛾 ᶵᲔⓗᛶ㉁䛜㔜せ䛻䛺䜛ᮏᢏ⾡䛿䛣䜜䜙䛾 ᐃ䜢 ྍ⬟䛻䛩䜛 ᮦᩱಙ㢗ᛶホ౯䝴䝙䝑䝖㻌 ⑂ປ◊✲䜾䝹䞊䝥㻌 㛗ᓥ㻌 ఙኵ E-mail : NAGASHIMA.Nobuo䖃nims.go.jp 㻌㻌 㻌㻌㻌㻌㻌 — 87 —
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