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1 4. NEDO NEDO
2 Grain Boundary Grain Interior mm μm nm Mg Photodiode Counts Energy Loss (ev).2 (AZ
3 %
4 -3
5 (1) (2) (3) AZ61 AZ80 ZK60 ACM AZ AZ
6 Al Zn Mn Fe Si Cu Ni Zr Ca RE AZ AZ ZK60 < <0.002 <0.002 <0.002 < ACM <0.001 < AZ < AZX <0.002 <
7 -6
8 AZ AZ AZ m (1)c -7
9 2.1.2( ) AZ (a) (b (c) (a) (b) (c) (d) -8
10 AZ MPa MPa AZ61 ZK60 ACM AZ ()
11 -10
12 -11
13 2.1.1-(1) (2) Hall-Petch μm -12
14 μm
15
16 AZX m AZX m -15
17 MPa195MPa 1.5 AZ MPa 344MPa MPa MPa MPa 15% AZX91 AZ AZ
18 AZ91 AZX911 -(3)
19 , ,300 47,400 90% (20,200 )(9,600 )(9,000 )(2,500 )(2,300 )(1,000 ) 1,100 (2.3%) 1 DC DC (3 mmφ) DC AZ31 AZ40AZ61AZ80AZ91ME21ZK61 20 RECa mmφ max. 5,500mmL(DC ) 5 mm AZ31B AZ61AZ80AZ91ZK60WE43WE54 RECa mm 2 ( ) 4 ( ) AZ31AZ61AZ91 CaZrLiRE 0.04 mm() mm 1,800 2,000mm ( ) -18
20 2 ( ) 1 1 ) mm (300) A B A C 300 mm 0.4 mm(180 mm) -19
21 DE mm D E DC G Ca Ca AZ80-20
22 C ( ) 170 mmφ AZ mm 150m 300 mm 100μm m DC mm 1 ( 1,000m/min1 60%) ECAE(ECAP) AZ31 ( ) 1-21
23 1 AZ % 200MPa 150MPa 11 ( hr) AZ μm 10μm 320MPa 12 mm AZ31 AZ60 AM mm Thyssenkrupp Stahl AG. 0.55mm 2000mm POSCO ASMA2(2nd Asian Symposium on Magnesium Alloys)
24 AZ31 AZ91Y Ca CaO(Ca ) ZnY SrAlZr 1 Ca AZCa X Y Z ( 1 ) 120 m
25 2 AZ mm MoS2h-BN AZ31B MoS2 h-bn ZK60 WC
26 Al TIG MIG FSW Al Mg FSW 2324 ) AZ80 (a μ (b μ -25
27
28 -27
29 -28
30 2.1.2 (1N.J.Petch, Phil. Mag., 3(1958), 1089 (2W.J. Kim, J.D. Park and W.Y. Kim, J. Alloys and Compounds, 460(2008), (3 110 ( (5 22 (6) F.J.Humphreys and M.Harherly, Recrystallization and Related Annealing Phenomena, Elsevier(1995), 373 (7M. Mabuchi, H. Iwasaki, K. Yanase and K. Higashi, Scripta Mater., 36(1997), (1) (2) (3) 108,(2005),1 (4) ( ) (5),35(197799),605 (6) (7) B.S.You, Y.M.Kim, C.D.Yim, S.S.Park, B.S.YouASMA2(2nd Asian Symposium on Magnesium Alloys),(2007),96 (8) W.J.Kim etal.asma2,(2007),366 (9) 56,(2005),9 (10) 58,(2007),257 (11) 251,(2006),15 (12) D.J.Yoon, E.Z.Kim, S.J.LimASMA2,(2007)370 (13) 111,(2006),203 (14) Magnesium35(2006),1 (15) 113,(2007),143 (16) W.J.Park, I.H.Jung, W.Bang, I.J.Kim, H.J.Sung, D.Choo, S.Ahn, W/.J.Park ASMA2,(2007),104 (17) 58,(2007),263 (18) R.Matsumoto,T.Kubo and K.OsakadaASMA2,(2007),238 (19) 58,(2007),245 (20),30(2001),21 (21),13(1999),20 (22),(2002),193 (23) Yuji Sakai etal.asma2,(2007),256 (24) TaikiMorishige etal.asma2,(2007),254-29
31 ( ) Watanabe AZ61 d0) (drex)z (1) Z(Zener-Hollomon ) Z ε& exp( Q / RT ) ε& Q R T m 10m -30
32 m 170MPa10 7
33 ) 2) 3) Z Zener-Hollomon Z ε& exp( Q / RT ) ε& Mg-AlMg-Y Z -32
34 Al at% Z 250(523K) K K s -1 Z 3 Al 3-33
35 Mg ΔE c exp 4ΔE kt γ = γ a ΔE 1 c 1 exp kt
36 Mg-0.94at.Y.2.2-6Z STEM MgY Y Y 40mJ/m 2 2nm Y 100nm Y Mg-Y Z STEM Y AZ h Mg17Al12 100hMg 17Al12 Al-Mn Mg17Al12100h Al 24h3% 100h 1% -35
37 -36
38 AZ Mg-4.12at%Al WDX Al 2 3 Al
39 Mg-0.94at%Y 12h h 573K s Mg-0.46at%Y Cu -38
40 100 )) AZ91 AZX AZ91AZX
41 AZ91 Al Al AZ911 A Mg AlCa AlMg AlCa AZ s s s -1-40
42 AZ91AZX911( ) AZ
43 AZ β () AZX Ca Al Al AZ91 Ca s -1 AZ91 AZ91AZX911 2 μm AZ91 AZX911 AZ91 AZX AZ91 AZX911 50% -42
44 10 s -1 H. Watanabe et al. : Mater. Trans., 42(2001), Watanabe 3 Z AZ91 AZX911 AZ AZ91 AZ AZ91327MPa 0.2%195MPa 7.4% Mpa 0.2%200MPa 15% T5-43
45 AZ91 AZX911 1) 2)Mg-Al-Ca 2) 1) AZX Ca 2) 2) ) 100 AZ91-44
46 AZX AZ91AZX h AZ91 AZX s -1 80( 1.6 ) AZ91 1) 2) 3) 2) AZ AZX911 AZ91 AZX911-45
47 AZ91( 10-1s ) m AZX911 (AZ91 ) AZ91 m AZ91 AZX911 )-2) -46
48 2.2.2 ((1)b()) Z 1s m AZ91 AZX911 Z
49 AZ91 AZX911 m AZ91 AZX AZ91 AZX911 AZ91 AZ91AZX MPa AZX s AZ AZ91 AZX MPa MPa
50 -49
51 2.1.1( ) AZ91( ) Z 473K 1.8m AZ91 Z s -1 Z 20-50
52 -51
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