|
|
|
| FORMATION OF ANNEALING TWINS IN α-IRON |
| CHUANG YU-CHIH AND WU CHEUNG-HUNG Institute of Metal Research;Academia Sinica |
|
Cite this article:
CHUANG YU-CHIH AND WU CHEUNG-HUNG Institute of Metal Research;Academia Sinica. FORMATION OF ANNEALING TWINS IN α-IRON. Acta Metall Sin, 1958, 3(1): 55-61.
|
|
|
Abstract Twin formation associated with grain boundary migration in recrystallized armcoiron has been studied by the method of vacuum etching.No noticable substructureswere observed after recrystallization at 750℃ for 5 hours.However,after reheatingfor a short time at 770℃,fine substructures appeared in most of the ferrite grains.During prolonged heating the substructure-free grains gradually grew at the expense ofthose possessing substructures.When the reheating temperature is raised close to theA_3 temperature,grain boundary migration is markedly accelerated.Two types of twins were observed during grain growth.One of them,probablyidentical in nature with ordinary annealing twins,has its non-coherent twin boundaryalways attached to the old grain boundary.Depending on the manner of migrationof the grain boundary and the non-coherent twin boundary,such type of twins maygrow,retreat,or even disappear.The other type of twins has a characteristic wedge-shaped twin boundary which is quite stable,and little change has been observed afterprolonged heating.
|
|
Received: 18 January 1958
|
[1] Tamura,S.J.,Journal of Iron & Steel Inst.,115(1927) ,747．
[2] O'Neill,H.,Journal of Iron & Steel Inst,117(1928) ,689．
[3] Greninger,A.B.,Trans.Amer.Inst.Mining & Metallurgical Engineers,120(1936) ,293．
[4] Barrett,C.S.,Trans.Amer.Inst.Mining & Metallurgical Engineers,Discussions,173(1940) ,190．
[5] #12
[6] Shuttleworth,R.,Metallurgia,38(1948) ,125．
[7] Burke,J.E.,Trans.Amer.Inst.Mining & Metallurgical Engineers,188(1950) ,1324．
[8] Burke,J.E.and Turnbull,D.,Progress in Metal Physics,vol.3(1952) ,220．
[9] #12
[10] Hall,E.O.,Twinning & Diffusionless Transformations in Metals(Butterworths Scientific Publications,London),1954．
[11] Dunn,C.G.,Daniels,F.W.and Bolton,M.J.,Trans.Amer.Inst.Mining & Metallurgical Engineers,188(1950) ,368．
[12] Ellis,W.C.and.Treuting,R.G.,Trans.Amer.Inst.Mining & Metallurgical Engineers,191(1951) ,53．
[13] Fullman,R.L.and Fisher,J.C,Journal of Applied Physics,22(1951) ,1350． |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
