·192· 北京科技大学学报 2005年第2期 3结论 teristics in two stage deformation of Mg-3Al-1Zn alloy sheet Mater Sei Eng,2003,A339:124 (1)镁合金AZ31在不同初始织构和不同形变 [4]Myshlyaev MM,MeQueen H J,Mwembela A,Konopleva E. Twinning,dynamic recovery and recrystallization in hot worked 量下发生的动态再结晶新晶粒取向与其周围的 Mg-Al-Zn alloy.Mater Sci Eng,2002,A337:121 形变晶粒相近，表现出连续式动态再结晶的特 [5]Tan JC.Tan MJ.Superplasticity and grain boundary sliding 点，即新晶粒是通过亚晶的逐渐转动形成的. characteristics in two stage deformation of Mg-3Al-IZn alloy (2)随着形变量增加，不同初始取向试样的晶 sheet.Mater SciEng.2003,A339:86 [6]de Valle J A,Pe'rez-Prado M T,Ruano O A.Texture evolution 粒都向基面{0002}平行于轧面的方向转动形成 during large-strain hot rolling of the Mg AZ61 alloy.Mater Sci 基面织构，说明塑性滑移仍在起作用：取向成像 Eng2003,A355:68 显示大的形变晶粒内亚晶界较少而且晶粒内部 [7]Philippe M J.Texture formation in hexagonal materials.Mater 菊池带质量较高，说明滑移主要发生在晶界附 Sci Forum,.1994,157-162:1337 [8]Mukai T,Yamanoi M,Watanabe H,et al.Ductility enhancement 近，大的形变晶粒应是逐渐被剪切而消失的. in AZ31 magnesium alloy by controlling its grain structure (3)动态再结晶新晶粒与形变晶粒的取向差 Seripta Mater,2001,45:92 统计结果说明ZY试样有较大的取向差，这是由原 [9]Klimanek P,Poetzsch A.Microstructure evolution under com- 始织构造成的，但总的趋势相同， pressive plastic deformation of magsium at different temperat- ures and strain rates.Mater Sci Eng,2002,A324:148 [10]Yang P,Cui F E,Ma S C,et al.Influence of initial textures on dy- 参考文献 namic recrystallization and textures in AZ31 magnesium alloys. [1]Galiyev A,Kaibyshev R,Gottstein G.Correlation of plastic de- Trans Nonferrous Met Soc China,2003,13:504 formation and dynamic recrystallization in magnesium alloy [11]Yang P,Cui F E,Bian J H,et al.Relationships between deforma- ZK60.Acta Mater,2001,49:1199 tion mechanisms and initial textures in polycrystalline mag [2]lon S E,Humphreys FJ.White S H.Dynamic recrystallization nesium alloys AZ31.Trans Nonferrous Met Soc China,2003, and the development of microstructure during the high tempera- 13(2:279 ture deformation of magnesium.Acta Metall,1982,30:1909 [12]杨平，胡轶嵩，崔凤娥.镁合金AZ3】高温形变机制的织构 3]Tan J C,Tan M J.Dynamic continuous recrystallization charac- 分析，材料研究学报，2004,18(1：52 Analysis on behavior of dynamic recrystallization in magnesium alloy AZ31 by orientation mapping MENG Li,YANG Ping"CUI Feng-e,ZHAO Zude 1)Materials Science and Engineering School,University of Science and Technology Beijing,Beijing 100083,China 2)The 59th Institute of Chinese Weapon Industry,Chongqing 400083,China ABSTRACT Orientation mapping based on EBSD technique is applied to reveal the orientation features of dy- namic recrystallized grains and their neighboring matrix in a magnesium alloy AZ31 with different initial textures. The results show that,irrespective of initial texture and strain amount,new grains are similarly orientated to their neighboring matrix,illustrating a dynamic recrystallization through progressive subgrain rotation.In addition,the new grains gradually rotate to basal orientation in different samples,which indicates an important role of plastic slip during dynamic recrystallization in stead of superplastic deformation.The less subgrain boundaries in deformed gra- ins under heavy strain were observed and these deformed grains have high quality of Kikuchi bands,which indicates that the deformed grains are consumed by the shear stress of grain boundaries parallel to the compression plane,rat- her than non-basal slip.The misorientation between the new and the deformed grains are measured and discussed in terms of the influence of initial texture KEY WORDS magnesium alloy;dynamic recrystallization;orientation mapping;misorientation一 2 1 9 北 京 科 技 大 学 学 报 2 0 0 年 第 2 期 - 5 结 论 3 ( l 镁合 金 ) z 在 不 同初 始织 构和 不 同形 变 A 3 1 量下 发 生 的 动 态 再 结 晶新 晶粒 取 向与其 周 围 的 形变 晶粒 相 近 , 表 现 出连 续 式 动 态 再 结 晶 的特 点 , 即新 晶粒 是 通过 亚 晶 的逐 渐 转动 形 成 的 . (2 ) 随着 形变 量 增加 , 不 同初 始取 向试 样 的 晶 粒 都 向基 面 { 0 0 0 2 } 平 行 于 轧面 的方 向转 动形 成 基面 织 构 , 说 明塑性 滑 移 仍在 起 作用 : 取 向成 像 显 示大 的形 变 晶粒 内亚 晶界 较 少 而 且 晶粒 内部 菊 池 带质 量 较 高 , 说 明滑 移 主 要 发 生 在 晶 界 附 近 , 大 的形变 晶粒应 是 逐 渐被 剪 切 而消 失 的 . ( 3) 动 态再 结 晶 新 晶粒 与形 变 晶粒 的取 向差 统计 结 果说 明Z Y试 样 有较 大 的取 向差 , 这是 由原 始织 构 造 成 的 , 但 总 的趋 势相 同 . 考 文 献 G a l ly e v A , K ia by s he v 民 G o ts t e in G . C ore lat ion o f P las t i e d e - fo rm at i o n an d dy n am i e re e ry s tal il 乙 时i o n in m a g l l e s i um al l oy Z K 6 0 . A e t a M a t e r , 2 0 0 1 , 4 9 : 119 9 I o n S E , H um P hr e y s F J , 认飞 l t e 5 H . yD n !an i e re cry s atl liaZ t l o n an d ht e d e v e loP m e nt o f m i e or s tru c t u r e d ur ign ht e ih gh t e m eP ar - trU e d e of rm at i o n o f m a g n e s i u m . A e at M e t a l , 19 8 2 , 3 0 : 1 90 9 Th n J C厂R田 M J , D yn am i e e o nt in u o u s re c ry sta lli atZ i o n e h ar a c - t e ir st i e s in tw o s ta g e d e fo rm at i o n o f M g 一 3 A I 一 I Z n a l l o y sh e e t M a te r S e i E n g , 2 0 0 3 , A 3 3 9 : 12 4 [ 4 ] M 夕 s hly ae v M M , M e Q u e en H J , M w e m b e l a A , K o n o p lvc a E . 1’w i n n i n g , 勿 n anz i e er e o v e yr an d r e e yr s alt li azt i o n in h o t w o kr e d M g . A I一 n a ll o y . M a t e r s e i E o g , 2 0 0 2 , A 3 3 7 : 12 1 【5 ] 1恤11 J C , , n 川 M J . S u P e rp las t i c iyt an d gr a in b o u n d叼 s lid in g e h ar e t e ir st i e s in wt o s加唱e d e fo mr at i o n o f M g 一 3A j 一 IZn a lloy s he e t . M a t e r S c i E n g , 2 0 0 3 , A 3 39 : 8 6 [ 6 ] ds 、 恤11 e J A , P e , er z 一 P r ad o M T, R u an o 0 A . eT xot er e v o lut i o n d ur ln g l a唱 e一 s t r a i n h o t r o l lin g o f ht e M g A Z 6 1 a ll oy M a t e r s e i E n g , 2 0 0 3 , A 3 55 : 6 8 [ 7 ] p h ilip p e M J eT x t u r e of rm at i o n in h e x 眼 o n a l m ate r i a l s · M a t e r S ic F o r u m , 1 9 94 , 1 57 一 16 2 : 1 3 37 [ 8 ] M u k a i T, Y山的 an o i M , W a tan ab e H , e t a l . D u e t ility e n h an e e m e n t i n A Z 3 1 m a g n e s i um a l loy by e o n t r 0 llin g i ts g r a i n s加 c t ur e . S e ir P at M a t e r , 2 0 0 1 , 4 5 : 9 2 [9 ] K l加an o k P, p o etz s e h A . iM c or s tr u c t以 e e v o lut i o n un d e r c o m - P r e s s i v e P las ti e d e of mr at i o n o f m a gn e s i um at d i fe er nt t em P e r at - uer s an d trS ia n r a t e s . M a et r S e i E n g , 2 0 0 2 , A 3 2 4 : 14 8 [ 10 ] y 由19 P, c ul F E , Ma s c , et ia . nI fl u e n c e o f i n i t i a l t e xtrU e s o n dy , n确i e re e ry s at lli Z a ti o n an d te x t u r e s in A Z 3 1 m a gn e s i u m a ll o y s . 介 a . s N o n fe r or u s M e t S o e C h i . a , 2 0 0 3 , 13 : 5 0 4 [川 丫劝 9 P, e u i F E , B ian J H , et a l . R e lat i o n s ihP s b e幻刀 e en d e of rm a - ti o n m e e h an i s m s an d in i ti目 te x t 叮 e s in P o ly e ry s at lli n e m ag - n e s i um a ll oy s AZ 3 1 . T r a n s N o n 介 r 几u , M e t s o e C h i n a , 2 0 0 3 , 13 ( 2 ) : 2 7 9 【12 ] 杨 平 , 胡轶 篙 , 崔凤 娥 . 镁合 金 A Z 3 1 高温 形变 机制 的织 构 分析 , 材 料研 究学 报 , 2 0 0 4 , 18 ( 1 ) : 52 参l] A n a ly s i s o n b e h va i o r o f d y n am i e r e e yr s t a lli z at i o n i n m ag n e s i um a ll o y A Z 3 1 b y o r i e n t a t i o n m ap P i n g 九丛刃G iL ,气YA N G 尸动g ,) C UI eF 刀 g - le气刀分刁 0 uZ dez , I ) M at e r i a l s S e i e n e e an d E飞ine e inr g S e h o o l , U n i v e rs ity o f s e i e n e e 明d 介 e hn o l o gy B e ij in g , B e ij ign l 0 0 0 83 , C h l n a 2 ) T h e 5 9ht I n s t i tU e o f C h in e s e W七ap o n nI d us try , Ch on g q i n g 4 0 0 0 8 3 , C hi n a A B S T R A C T O r i e in at i o n m ap P i n g b as e d o n E B S D te e lm i q u e 1 5 a P P li e d t o re v e a l hte o ir e in at i o n fe a t ur e s o f dy - n am i c re e ry s at ll i z e d gr ia n s an d t h e ir n e ig h b o it n g m a t ir x i n a m a g n e s i um a ll o y A Z 3 1 w i th d i fe r e in i n it i a l t e x trU e s . hT e r e s u lt s s h o w ht at , ir e s P e e t i v e o f iin t i a l t e x 奴甘 e an d s atr i n am o u n t , n e w gr a in s aer s im i l ar ly o ir e in at e d t o ht e i r n e ihg b o ir n g m a itr x , ill u s tr at i n g a dy n am i e er e yr s t a lll z a t l o n t hr o u g 】I P or gr e s s i v e s ub g r a i n or t iat o n . I n a d iti o n , th e n e w gr a i n s gr a du a ll y or at e t o b a s a l o ir e n t a tl o n in d i fe r e nt s am P l e s , w h i e h in d i e at e s an i m P o rt ant or l e o f P l a s t i c s li P d u ir gn dy n am i c r e e yr sat ll说at i o n i n s t e ad o f s uP e rp l a s t i e d e fo mr iat o n . hT e l e s s s ub gr a in b o u n d iar e s i n d e fo mr e d gr a - i n s un d e r h e a v y s tr a i n w e er o b s e vr e d an d ht e s e de fo mr e d gr a l n s h a v e h ihg q u a li yt o f jK k u e h i b an d s , w h i e h i n d i e at e s ht at ht e de fo n n e d gr a m s aer e o n s 翻 m e d 勿 het hs e ar str e s s o f gr ian b o 切 l d而 e s P ar a ll e l ot het o o m P r e s s ion P lan e , r at - h e r t h an n o n 一 b a s a l s l i P . hT e m i s o ir e in at i o n b e wt e e n t he n e w an d ht e d e fo mr e d g r a in s aer m e a s ur e d an d d i s e us s e d i n t e l l l l s o f t h e i n fl u e n c e o f i n i t i a l t e x ot r e . K E Y W O R D S m a gn e s i um a l l o y ; d y n am i e er e yr s t a l l i z at i o n ; o ir e n t a ti o n m ap Pi n g ; m i s o ir e n at i o n