在应变速率为2×10-5～1×10-3s-1范围内以及不同温度(600～700℃)下,对11Cr铁素体/马氏体钢进行拉伸试验,研究其在变形过程中的锯齿流变现象.结果表明:试验钢在变形过程中出现了“反常”锯齿流变,且只出现一种E型锯齿波;锯齿开始出现在拉伸应力最大值附近,锯齿波主要处于拉伸曲线的下降段;锯齿形成的有效激活能约为43.44 kJ·mol-1;高温时,置换原子气团能量高,完全钉扎住位错,当一定数量的位错达到临界运动速度时,摆脱了置换原子气团的钉扎,从而导致产生锯齿流变现象.
参考文献
| [1] | 钱匡武,李效琦,萧林钢,陈文哲,张好国,彭开萍.金属和合金中的动态应变时效现象[J].福州大学学报(自然科学版),2001(06):8-23. |
| [2] | K.Dehghani;J.J. Jonas .Dynamic Bake Hardening of Interstitial-Free Steels[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2000(5):1375-1384. |
| [3] | Mesarovic SD. .DYNAMIC STRAIN AGING AND PLASTIC INSTABILITIES[J].Journal of the Mechanics and Physics of Solids,1995(5):671-700. |
| [4] | 彭开萍,陈文哲,钱匡武.3004铝合金的拉伸变形特征[J].机械工程材料,2005(12):13-16. |
| [5] | 王刚,李志刚,韩鹏程,沈寅忠.304奥氏体不锈锕高温拉伸变形时的锯齿流变行为[J].机械工程材料,2012(06):64-67. |
| [6] | Wagner D.;Moreno JC.;Prioul C.;Frund JM.;Houssin B. .Influence of dynamic strain aging on the ductile tearing of C-Mn steels: modelling by a local approach method[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2002(2/3):178-191. |
| [7] | Tian BH. .Ageing effect on serrated flow in Al-Mg alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):272-278. |
| [8] | J.Balik;P.Lukac .Inverse critical strains for jerky flow in Al-Mg alloys[J].Scripta materialia,2000(5):465-471. |
| [9] | Was GS;Ampornrat P;Gupta G;Teysseyre S;West EA;Allen TR;Sridharan K;Tan L;Chen Y;Ren X .Corrosion and stress corrosion cracking in supercritical water[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2007(1/3):176-201. |
| [10] | Keller, C.;Margulies, M.M.;Guillot, I..Experimental analysis of the dynamic strain ageing for a modified T91 martensitic steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:273-275. |
| [11] | Roy, AK;Kumar, P;Maitra, D .Dynamic strain ageing of P91 grade steels of varied silicon content[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2009(1/2):379-386. |
| [12] | C. Gupta;J. K. Chakravartty;S. L. Wadekar;J. S. Dubey .Effect of serrated flow on deformation behaviour of AISI 403 stainless steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1):49-55. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%