4. NEDO NEDO 20 23-26
Grain Boundary Grain Interior.2.1.1.1-1 mm μm nm Mg Photodiode Counts 450 500 550 600 Energy Loss (ev).2 (AZ91+ 300-1
300 0.1%.1.1-1 -2
-3
(1) (2) (3) 18 19 AZ61 AZ80 ZK60 ACM522.2.1-1.2.1-1.2.1-2.2.1-2 AZ80 250.2.1-3 AZ80 400 250-4
Al Zn Mn Fe Si Cu Ni Zr Ca RE AZ61 6.09 0.79 0.25 0.005 0.010 0.0012 0.0008 AZ80 8.28 0.52 0.27 0.005 0.014 0.0008 0.0008 ZK60 <0.001 4.75 0.008 <0.002 <0.002 <0.002 <0.002 0.633 ACM 522 5.3 0.17 <0.001 <0.001 2.0 2.6 AZ91 8.7 0.81 0.21 0.004 0.005 <0.002 0.002 0.002 AZX 911 8.9 0.84 0.18 0.003 0.007 <0.002 <0.002 0.86-5
-6
.2.1-4 AZ80 250.2.1-5 AZ80 400 250 400.2.1-6AZ 80 250 300 400 2500 m.2.1-7 2.2.3(1)c -7
2.1.2( ) AZ80 18 19 100 (a) (b (c) (a) (b) (c) (d) -8
18 19.2.1-8 AZ80 250 400 250 371MPa 400 326MPa.2.1-911 AZ61 ZK60 ACM522 250 400 AZ80.2.1-34 2.1.2() 18 19 100-9
-10
-11
2.1.1-(1) 2.1.2 -(2) 18 19 400 250 Hall-Petch 2.2.1-12 μm -12
μm.2.1-13 -13
.2.1.14 300 300.2.1-15 -14
.2.1-16 AZX911 300 10m.2.1-17 AZX911 10 m -15
.2.1-18 300MPa195MPa 1.5 AZ91.2.1-19 226MPa 344MPa 16 340MPa 15 170MPa10 7 340MPa 15% AZX91 AZ91 18.2.1-20 18 AZ80 300 19-16
19.2.1-21 AZ91 AZX911 -(3) 100-17
2007 793,000 627,300 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 100 600 mmφ max. 5,500mmL(DC ) 5 mm AZ31B AZ61AZ80AZ91ZK60WE43WE54 RECa 8 300 mm 2 ( ) 4 ( ) AZ31AZ61AZ91 CaZrLiRE 0.04 mm() 0.50.8 150600 mm 1,800 2,000mm ( ) -18
2 ( ) 1 1 ).2.1-22 mm (300) A B A C 300 mm 0.4 mm(180 mm) -19
DE mm D E DC G Ca Ca.2.1-23.2.1-24 AZ80-20
C.2.1-25 ( ) 170 mmφ.2.1-26 AZ90 500 mm 150m 300 mm 100μm 100 500 m DC 40 120 mm 1 ( 1,000m/min1 60%) 10.2.1-27 ECAE(ECAP) AZ31 ( ) 1-21
1 AZ31 400 0.2% 200MPa 150MPa 11 (350 12 hr) AZ31 120 200 200μm 10μm 320MPa 12 mm.2.1-28 13 AZ31 AZ60 AM60 600 mm Thyssenkrupp Stahl AG. 0.55mm 2000mm 14 15 POSCO 16 2007 10 ASMA2(2nd Asian Symposium on Magnesium Alloys) 4 175-22
.2.1-29 4 AZ31 AZ91Y.2.1-30 Ca CaO(Ca ) ZnY SrAlZr 1 Ca AZCa611 200 X Y Z ( 1 ) 120 m 9 15-23
2 AZ31.2.1-31 2 0.5 mm MoS2h-BN AZ31B 300400 MoS2 h-bn 2021.2.1-5.2.1-32 ZK60 WC 300 22-24
Al TIG MIG FSW Al Mg FSW 2324 ).2.1-33-35 AZ80 (a μ (b μ -25
.2.1-36.2.1-37 18 19 70 100-26
-27
-28
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), 289-293 (3 110 (411 2004 465 (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), 681-686 2.1.3 (1) (2) 2000-104129 (3) 108,(2005),1 (4) ( ) (5),35(197799),605 (6) 05-305380 (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
.2.2-1 ( ) Watanabe AZ61 d0) (drex)z (1) Z(Zener-Hollomon ) Z ε& exp( Q / RT ) ε& Q R T 50 100m 10m -30
-31 2.1 50 m 170MPa10 7
.2.2-1 1) 2) 3) Z Zener-Hollomon Z ε& exp( Q / RT ) ε&.2.2-2 Mg-AlMg-Y Z -32
.2.2-3 Al 0.882.164.12at% Z 250(523K)300 573K350 623K1 10-110 -4 s -1 Z 3 Al 3-33
10.2.2-110 Mg ΔE c exp 4ΔE kt γ = γ 0 + 2 3a ΔE 1 c 1 exp kt 40.4.2.2-1.2.2-5 -34
Mg-0.94at.Y.2.2-6Z STEM MgY Y Y 40mJ/m 2 2nm Y 100nm Y Mg-Y.2.2-7 Z STEM Y AZ91.2.2-8 10.2.2-89 2 415 24h Mg17Al12 100hMg 17Al12 Al-Mn Mg17Al12100h.2.2-10 Al 24h3% 100h 1% -35
-36
AZ91 2.2.2-11Mg-4.12at%Al.2.2-12 WDX Al 2 3 Al 2 3.2.2-13.2.2-12 5 6-37
.2.2-14 Mg-0.94at%Y 12h 175 12h 573K 110-3 s -1.2.2-15 Mg-0.46at%Y Cu -38
100 )) AZ91 AZX911.2.2-2 AZ91AZX911.2.2-16 -39
.2.2-17 AZ91 Al Al.2.2-18 AZ911 A Mg AlCa AlMg AlCa.2.2-19AZ91 300 2 10- s -1 2 10- s -1 3002 10- s -1-40
3040.2.2-20 AZ91AZX911(415 24 ) AZ91 300-41
350.2.2-22 400 AZ91 400 β () 300350 3 AZX911 300 350 400Ca Al Al AZ91 Ca.2.2-21300 2 10 s -1 AZ91 AZ91AZX911 2 μm AZ91 AZX911 AZ91 AZX911.2.2-22AZ91 AZX911 50% -42
10 s -1 H. Watanabe et al. : Mater. Trans., 42(2001), 1200-1205 Watanabe 3 Z AZ91 AZX911 AZ91 2.2-23 1 10 AZ91 AZ91 3002 10 50 AZ91327MPa 0.2%195MPa 7.4% 350 316Mpa 0.2%200MPa 15% T5-43
AZ91 AZX911 1) 2)Mg-Al-Ca 2) 1) AZX911 350 Ca 2) 2) ) 100 AZ91-44
AZX911.2.2-24 AZ91AZX911 410 24h AZ91 AZX911.2.2-25 28300-2 1s -1 80( 1.6 ) 10 12.2.2-25AZ91 1) 2) 3) 2).2.2-26AZ91.2.2-2728AZX911 AZ91 AZX911-45
.2.2-29 AZ91( 10-1s -1 300 80) m.2.2-30 AZX911 (AZ91 ) AZ91 m AZ91 AZX911 )-2) -46
2.2.2 ((1)b()).2.2-31 Z 1s -1 10 m AZ91 AZX911 Z.2.2-32 -47
AZ91 AZX911 m AZ91 AZX911 300 2.2-1 AZ91 AZX911 AZ91 AZ91AZX911 300MPa 10.2.2-33 AZX911 300 10- s -1 50 284 AZ91.2.2-34 AZ91 AZX911 300MPa 15 300MPa 15 100-48
-49
2.1.1( ).2.2-35.2.2-36 AZ91( ) Z 473K 1.8m AZ91 Z5 10 12 s -1 Z 20-50
-51