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| KINETICS OF DECOMPOSITION OF RETAINED AUSTENITE DURING TEMPERING IN SOME HIGH STRENGTH STEELS |
| SHIH CHANG-HSU Institute of Metal Research;Academia Sinica |
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Cite this article:
SHIH CHANG-HSU Institute of Metal Research;Academia Sinica. KINETICS OF DECOMPOSITION OF RETAINED AUSTENITE DURING TEMPERING IN SOME HIGH STRENGTH STEELS. Acta Metall Sin, 1956, 1(4): 383-393.
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Abstract The kinetics of decomposition of retained austenite in AISI 4325,AISI 4340and their silicon modified steels has been studied by precision length measurement.It is found that the internal stresses play a very important role in the first instantof transformation.In steels with normal silicon content(0.2—0.3%),the activation energy of thedecomposition of retained austenite is about 35,000 cal/mole,comparable to thatrequired for the diffusion of carbon in γ-Fe.In general,high silicon content(1.5% Si)retards the transformation of retain-ed austenite in these steels.Based upon the isothermal transformation curvesand rate equation the activation energy for this transformation has been deter-mined to be about 44,000 cal/mole,and it is therefore suggested that the diffusionof silicon in γ-Fe surrounding the growing carbide particles is possibly the ratecontrolling factor.
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Received: 18 April 1956
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[1] Sands,J.W.,Symposium,Ultra High Strength Steels in Aircraft Applications,Soc.of Automotive Engineers(1953) ,p.35．
[2] Shih,C.H.(师昌绪),Averbach,B.L.and Cohen,M.,Trans.ASM,48(1956) ,86．
[3] 师昌绪,未出版的报告.
[4] Moeller,C.E.,见文献[1] ,p.47．
[5] 张沛霖、徐萃章,金属学报,第1卷第4期(1956) ,347．
[6] Averbach,B.L.,Lorris,S.and Cohen,M.,Trans.ASM,44(1952) ,746．
[7] Averbach,B.L.and Cohen,M.,Trans.ASM,41(1949) ,1024．
[8] Bhattacharyya,S.and Kehl,G.L.,Trans.ASM,47(1955) ,351．
[9] Wells,C.,Batz,W.and Mehl,R.F.,Trans.AIME,188(1950) ,553．
[10] Batz,W.,Mead,H.W.and Birchenall,C.E.,Trans.AIME,194(1952) ,1070．
[11] Owen,W.,Trans.ASM,46(1954) ,812．
[12] Zener,C.,J.Appl.Phys.,20(1949) ,950．
[13] Hollomon.J.H.,Gordon Research Conference,New Hampton,New Hamshire,USA,1952．
[14] Hultgren,A.,Trans.ASM,39(1947) ,915．
[15] Modin,H.and Modin,S.,Jernkontorets Annaler,139(1955) ,481．
[16] Kuo,K.(郭可信)and Hultgren,A.,Rev.Mét.,50(1953) ,847．
[17] Roberts,G.S.,Averbach,B.L.and Cohen,M.,Trans.ASM,45(1953) ,576． |
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