高周疲劳变形中二次孪晶与锥面位错之间的关系（英文）
|
摘要
采用金相显微镜(OM),扫描电镜(SEM),透射菊池衍射(TKD)和透射电子显微镜(TEM)表征技术,研究了高周疲劳变形后的Mg-3Al-1Zn镁合金的典型断口组织特征,二次孪晶内部的横切面区域被提取出来进行TEM和TKD观察。结果显示断口边缘附近的区域有大量的{1012}{1012}二次孪晶,双束明场技术(TBBF)应用于研究二次孪晶边界的位错类型。研究发现锥面位错在{1012}-{1012}二次孪晶内部被大量的激活,这被认为锥面位错与二次孪晶有关联。二次孪晶内部的局部应力集中将导致锥面位错的形成。
Typical fracture morphology of Mg-3Al-1Zn alloy after cyclic deformation was investigated using optical microscope(OM), scanning electron microscopy(SEM), transmission Kikuchi diffraction(TKD) and transmission electron microscopy(TEM). Cross-section samples were extracted from secondary twin regions for TEM/TKD observation. The results show that a large amount of {1012}-{1012} secondary twins are observed in the region near the fractured edge. Two-beam bright field(TBBF) technique was applied to study the types of dislocations along secondary twin boundaries. It is found that pyramidal dislocations are highly active within {1012}-{1012} secondary twins, which is considered to be related to{1012}-{1012} secondary twins. Localized stress concentration within the secondary twins may lead to the formation of pyramidal dislocations.
Typical fracture morphology of Mg-3Al-1Zn alloy after cyclic deformation was investigated using optical microscope(OM), scanning electron microscopy(SEM), transmission Kikuchi diffraction(TKD) and transmission electron microscopy(TEM). Cross-section samples were extracted from secondary twin regions for TEM/TKD observation. The results show that a large amount of {1012}-{1012} secondary twins are observed in the region near the fractured edge. Two-beam bright field(TBBF) technique was applied to study the types of dislocations along secondary twin boundaries. It is found that pyramidal dislocations are highly active within {1012}-{1012} secondary twins, which is considered to be related to{1012}-{1012} secondary twins. Localized stress concentration within the secondary twins may lead to the formation of pyramidal dislocations.
引文
1Wu W, Lee S Y, Paradowska A M et al. Materials Science and Engineering A[J], 2012, 556(9):278
2 HazeliK,AskariH,CuadraJetal.InternationalJournalof Plasticity[J], 2015, 68:55
3 DallmeierJ,HuberO,SaageHetal.Materials&Design[J],2015, 70:10
4 Azadi M, Farrahi G H, Winter G et al. Materials&Design[J],2014, 53(1):639
5 DuanGS,WuBL,DuXHetal.MaterialsScienceand Engineering A[J], 2014, 603(6):11
6 KoikeJ,FujiyamaN,AndoDetal.ScriptaMaterialia[J],2010, 63(7):747
7 Koike J, Kobayashi T, Mukai T et al. Acta Materialia[J], 2003,51(7):2055
8Koike J, Ohyama R. Acta Materialia[J], 2005, 53(7):1963
9 AgnewSR,HortonJA,YooMH.Metallurgicaland Materials Transactions A[J], 2002, 33(3):851
10 TangY,El-AwadyJA.MaterialsScienceandEngineering A[J], 2014, 618:424
11 Tang Y, El-Awady J A. Acta Materialia[J], 2014, 71:319
12 Xie K Y, Alam Z, Caffee A et al. Scripta Materialia[J], 2016,112:75
13 ObaraT,YoshingaH,MorozumiS.ActaMetallurgica[J],1973, 21(7):845
14 Syed B, Geng J, Mishra R K et al. Scripta Materialia[J], 2012,67(7-8):700
15 TanL,ZhangX,SunQetal.MaterialsScienceand Engineering A[J], 2017, 699:247
16 WeygandD,GumbschP.MaterialsScienceandEngineering A[J], 2005, 400-401(1):158
17 XinRL,DingCH,GuoCFetal.MaterialsScienceand Engineering A[J], 2016, 652(116):42.
18 LentzM,RisseM,SchaeferNetal.Nature Communications[J], 2016, 7:11 068
19 TanL,ZhangX,XiaTetal.MaterialsScienceand Engineering A[J], 2018, 711:205
20JohanssonJ,PerssonC,LaiHetal.MaterialsScienceand Engineering A[J], 2016, 662:363
21 ZhuSQ, Yan H G,Liao X Zetal. ActaMaterialia[J],2015,82:344
22 KhosravaniA,FullwoodDT,AdamsBLetal.Acta Materialia[J], 2015, 100:202
23 YooMH,MorrisJR,HoKMetal.Metallurgicaland Materials Transactions A[J], 2002, 33(3):813
24 Yoo M H, Agnew S R, Morris J R et al. Materials Science and Engineering A[J], 2001, 319-321(15):87
25 AgnewSR,TomeCN,BrownDWetal.Scripta Materialia[J], 2003, 48(8):1003
26 AndoD,KoikeJ,SutouY.ActaMaterialia[J],2010,58(13):4316
27 GengJ,ChisholmMF,MishraRKetal.Philosophical Magazine[J], 2015, 95(35):3910
28 Li B, Yan P F, Sui M L et al. Acta Materialia[J], 2010, 58(1):173
29GhazisaeidiM,CurtinWA.ModellingandSimulationin Materials Science and Engineering[J], 2013, 21(5):055 007
30 Kim K H, Jeon J B, Kim N J et al. Scripta Materialia[J], 2015,108:104
2 HazeliK,AskariH,CuadraJetal.InternationalJournalof Plasticity[J], 2015, 68:55
3 DallmeierJ,HuberO,SaageHetal.Materials&Design[J],2015, 70:10
4 Azadi M, Farrahi G H, Winter G et al. Materials&Design[J],2014, 53(1):639
5 DuanGS,WuBL,DuXHetal.MaterialsScienceand Engineering A[J], 2014, 603(6):11
6 KoikeJ,FujiyamaN,AndoDetal.ScriptaMaterialia[J],2010, 63(7):747
7 Koike J, Kobayashi T, Mukai T et al. Acta Materialia[J], 2003,51(7):2055
8Koike J, Ohyama R. Acta Materialia[J], 2005, 53(7):1963
9 AgnewSR,HortonJA,YooMH.Metallurgicaland Materials Transactions A[J], 2002, 33(3):851
10 TangY,El-AwadyJA.MaterialsScienceandEngineering A[J], 2014, 618:424
11 Tang Y, El-Awady J A. Acta Materialia[J], 2014, 71:319
12 Xie K Y, Alam Z, Caffee A et al. Scripta Materialia[J], 2016,112:75
13 ObaraT,YoshingaH,MorozumiS.ActaMetallurgica[J],1973, 21(7):845
14 Syed B, Geng J, Mishra R K et al. Scripta Materialia[J], 2012,67(7-8):700
15 TanL,ZhangX,SunQetal.MaterialsScienceand Engineering A[J], 2017, 699:247
16 WeygandD,GumbschP.MaterialsScienceandEngineering A[J], 2005, 400-401(1):158
17 XinRL,DingCH,GuoCFetal.MaterialsScienceand Engineering A[J], 2016, 652(116):42.
18 LentzM,RisseM,SchaeferNetal.Nature Communications[J], 2016, 7:11 068
19 TanL,ZhangX,XiaTetal.MaterialsScienceand Engineering A[J], 2018, 711:205
20JohanssonJ,PerssonC,LaiHetal.MaterialsScienceand Engineering A[J], 2016, 662:363
21 ZhuSQ, Yan H G,Liao X Zetal. ActaMaterialia[J],2015,82:344
22 KhosravaniA,FullwoodDT,AdamsBLetal.Acta Materialia[J], 2015, 100:202
23 YooMH,MorrisJR,HoKMetal.Metallurgicaland Materials Transactions A[J], 2002, 33(3):813
24 Yoo M H, Agnew S R, Morris J R et al. Materials Science and Engineering A[J], 2001, 319-321(15):87
25 AgnewSR,TomeCN,BrownDWetal.Scripta Materialia[J], 2003, 48(8):1003
26 AndoD,KoikeJ,SutouY.ActaMaterialia[J],2010,58(13):4316
27 GengJ,ChisholmMF,MishraRKetal.Philosophical Magazine[J], 2015, 95(35):3910
28 Li B, Yan P F, Sui M L et al. Acta Materialia[J], 2010, 58(1):173
29GhazisaeidiM,CurtinWA.ModellingandSimulationin Materials Science and Engineering[J], 2013, 21(5):055 007
30 Kim K H, Jeon J B, Kim N J et al. Scripta Materialia[J], 2015,108:104