|
|
|
| IN-SITU OBSERVATION OF δ→γ PHASE TRANSFORMATION OF AN AISI304 STAINLESS STEEL |
| Gaofei Liang;;;; |
| 上海宝钢股份研究院前沿技术研究所 |
|
Cite this article:
Gaofei Liang. IN-SITU OBSERVATION OF δ→γ PHASE TRANSFORMATION OF AN AISI304 STAINLESS STEEL. Acta Metall Sin, 2007, 43(2): 119-124 .
|
|
|
Abstract The process and characteristics of high-temperature ferrite (δ) → austenite (γ) phase transformation during cooling of an AISI30 stainless steel have been observed in-situ by using a confocal laser scanning microscope. The results show γ phase appears prior at the δ grain boundaries. The cooling rate affects the growth morphology of γ phase which representatively includes polygon, block-like, round, dendritic, plat-form, network, and calabash-like. The independent γ dendrite becomes coarse, and may converge with others surrounding γ dendrites. The convergence degree for the γ dendrite at the δ grain boundary is clearly higher than that in the grain at the same cooling rate. The secondary dendrites become coarse, and grow competitively during cooling. The growth interface becomes unstable as the cooling rate increases. Meanwhile, the movement rate increases, along with the sudden rise and then fall of temperature.
|
|
Received: 04 April 2006
|
|
|
[1]Mark B,Lars H,Reiner K,Willi S,Dieter S.Steel Res,2001;72:484
[2]Ferry M,Thomson M,Manohar P A.Iron Steel Inst Jpn,2002;42:86
[3]Allan G K.Ironmaking Steelmaking,1995;22:465
[4]Liang G F,Wang C Q,Fang Y.Acta Metall Sin,2006;42:708(梁高飞，王成全，方园．金属学报，2006；42：708)
[5]Yin H,Emi T,Shibata H.Acta Mater,1999;47:1523
[6]Dippenaar R,Phelan D.Metall Mater Trans,2003;34B:495
[7]Phelan D,Dippenaar R.ISIJ Int,2004;44:414
[8]Phelan D,Dippenaar R.Metall Mater Trans,2004;35A:3701
[9]Liang G F,Wang C Q,Fang Y.Acta Metall Sin,2006;42:805(梁高飞，王成全，方园．金属学报，2006；42：805)
[10]Wei Z Y.Iron Steel,1980;15(2):45(魏振宇．钢铁，1980；15(2)：45)
[11]Mizoguchi T,Miyazawa K.ISIJ Int,1995;35:771
[12]Ma Y,Hao Y,Yah F Y,Liu H J.Acta Metall Sin,2001;37:202(马颖，郝远，阎峰云，刘洪军．金属学报，2001；37：202)
[13]Liu Z Y,Fu H Z.Chin J Nonferrous Met,1997;7(1):164(刘志义，傅恒志．中国有色金属学报，1997；7(1)：164)
[14]He G,Li J G,Mao X M,Fu H Z.J Synth Cryst,1995;24:278(何国，李建国，毛协民，傅恒志．人工晶体学报，1995；24：278)
[15]Liu Z Z,Kobayashi Y,Yang J,Nagai K,Kuwabara M.ISIJ Int,2006;46:847
[16]Ueshima Y,Mizoguchi S,Matsumiya T,Kajioka H.Metall Trans,1986;17B:845
[17]Ueshima Y,Sawada Y,Mizoguchi S,Kajioka H.Metall Trans,1989;20A:1375
[18]Liang G F,Wang C Q,Wu J C,Zhu G M,Yu Y,Fang Y.Acta Metall Sin (Engl Lett),2006;19:441 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
