|
|
|
| Effect of Stress on Low Temperature Phase Transformation of T91 Ferrite Heat Resistant Steel |
| NING Baoqun1,LIU Yongchang1,QIAO Zhixia1,YANG Liushuan2 |
| 1. College of Materials Science and Engineering, Tianjin University, Tianjin 300072, China；2. Department of Materials Science and Engineering, Pingdingshan Institute of Technology, Pingdingshan 467001, Henan, China |
|
|
|
|
Abstract The effect of stress applied at certain temperature on low temperature phase transformation of T91 was studied with Baehr DIL805A/D highresolution differential dilatometer. According to the results of dilatometric measurement and microstructure observation, kinetics of phase transformation was obtained. It was found that the stress promotes formation of martensite and increase of Ms; but the stress applied at different temperature exhibits different effect on Ms: with increase of stress,at 760 ℃ and 650 ℃ Ms decreases, whereas at 440 ℃ Ms is constant at first and increases afterwards. The above phenomena could be accounted for the different inherent phase transformation mechanism: the former is controlled by the morphology of the deformed austenite,the latter is influenced by stress induced martensite transformation.
|
|
Received: 01 January 1900
|
|
|
|
| [1] |
ZHAO Baochun，ZHANG Tao，LI Guiyan，LIN Tianzi，YAN Pingyuan. Continuous cooling transformation behavior and modeling of #br# hot deformed austenite in a HSLA steel[J]. Iron and Steel, 2019, 54(7): 98-102. |
| [2] |
WANG Bin,YE Dong- dong,CHEN Jian- jun,SUN Quan,AN Qi. Experimental and numerical analysis of compression fracture for strip steel oxidation film[J]. Chinese Journal of Iron and Steel, 2017, 29(9): 762-767. |
| [3] |
DA Chuan-li,YANG Geng-wei,MAO Xing-ping,,YU Chi-bin,HE Xian-ling,CAI Zheng,. Effect of austenite deformation on phase transformation behavior of 50CrV4 steel[J]. Chinese Journal of Iron and Steel, 2017, 29(5): 411-419. |
| [4] |
YE Dong- dong,CHEN Jian- jun,WANG Zhong- jian. Spalling mechanisms of oxide scale of strip under different stress states[J]. Chinese Journal of Iron and Steel, 2016, 28(1): 64-70. |
| [5] |
Li Tai Quan. The Effect of Inclusions Containing Mg in X120 Pipeline steel on Deformed Austenite and γ-αTransformation[J]. Iron and Steel, 2009, 1(7): 62-0. |
| [6] |
Ning Bao-Qun 宁保群 . Effect of cooling rate on phase transformation process and microscopic structure of T91 ferritic heat resistant steel[J]. Iron and Steel, 2009, 1(7): 71-0. |
|
|
|
|
2007, Vol. 42 
