典型文献
Formation mechanism of γ twins in β-solidified γ-TiAl alloys
文献摘要：
Defects,such as stacking faults(SF)and twins,play a crucial role in stabilizing the order phase and improving the mechanical properties for engineering alloys.The formation mechanism of the γ twins from α2-platelets within β0 areas was analyzed at atomic-scale by atomic-resolution high-angle annular dark-field scanning transmission electron microscopy(HADDF-STEM).The growth faults(ABABCBC)were formed in α2-platelets,yielding a local D019→L10(α2 → γ)phase transformation.During the annealing process,the growth faults can be rearranged into γ(ABCABC)and γT(ACBACB)platelets via the slip-ping of Shockley partial dislocations 1/3[(1)010]and 1/3[10(1)0],respectively.The γ and γT can merge intoγ twins by accident during growing.The interface steps between α2 and γ platelets implied that this transformation is a diffusion-controlled defect migration process.The present work provides profound insight towards the formation mechanism of γ twins,contributing to microstructure controlling and per-formance improving for TiAl alloys.
文献关键词：
中图分类号：
作者姓名：
Yan Liu;Jinshan Li;Bin Tang;William Yi Wang;Minjie Lai;Lei Zhu;Hongchao Kou
作者机构：
State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China
文献出处：
引用格式：
[1]Yan Liu;Jinshan Li;Bin Tang;William Yi Wang;Minjie Lai;Lei Zhu;Hongchao Kou-.Formation mechanism of γ twins in β-solidified γ-TiAl alloys)[J].材料科学技术（英文版）,2022(10):164-171
A类：
HADDF,ABABCBC,D019,ABCABC,ACBACB
B类：
Formation,mechanism,twins,solidified,TiAl,alloys,Defects,such,stacking,faults,SF,play,crucial,role,stabilizing,order,phase,improving,mechanical,properties,engineering,from,platelets,within,areas,was,analyzed,atomic,scale,by,resolution,high,angle,annular,dark,field,scanning,transmission,electron,microscopy,STEM,growth,were,formed,yielding,local,L10,transformation,During,annealing,process,rearranged,into,via,slip,ping,Shockley,partial,dislocations,respectively,merge,accident,during,growing,interface,steps,between,implied,that,this,diffusion,controlled,defect,migration,present,work,provides,profound,insight,towards,contributing,microstructure,controlling,formance
AB值：
0.607124
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