| The influence of temperature on stacking fault energy in Fe-based alloys |
| |
| 引用本文： | 万见峰,陈世朴,徐祖耀. The influence of temperature on stacking fault energy in Fe-based alloys[J]. 中国科学E辑(英文版), 2001, 44(4): 345-352. DOI: 10.1007/BF02916685 |
| |
| 作者姓名： | 万见峰 陈世朴 徐祖耀 |
| |
| 作者单位： | T.Y.HsuSchool of Materials Science and Engineering，Shanghai Jiao Tong University，Shanghai 200030，China |
| |
| 基金项目： | This work was supported by the National Natural Science Foundation of China (Grant No.59671023)，the Fund for Ph. D. Program, the Ministry of Education (No. 97024835) of China and the Emerson Electric Co. USA. |
| |
| 摘 要： | Temperature has great influence on the stacking fault energy (SFE). Both SFE and dr0/ d T for Fe-based alloys containing substitutional or interstitial atoms increase with increasing tempera-ture. Based on the thermodynamic model of SFE, the equation dr0/dT=drcn/dT+drseg/dT+drMG/dT and thoseexpressions for three items involved are established. The calculated dr0/dT is generally consistent with the experimental. The influence of chemical free energy on the temperature dependence of SFE is almost constant, and is obviously stronger than that of magnetic and segregation contributions. The magnetic transition and the segregation of alloying elements at stacking faults cause a decrease in SFE of the alloys when temperature increases; that is, drMG/dT<0 and dyseg/dT<0. Meanwhile, such an influence decreases with increasing temperature, except for the drseg/d 7 of Fe-Mn-Si alloys. With these results, the experimenal phenomena that the SFE of Fe-based alloys is not zero at the thermo-dynamically equilibrated tem
|
The influence of temperature on stacking fault energy in Fe-based alloys |
| |
| WAN Jianfen,CHEN Shipu,XU Zuyao. The influence of temperature on stacking fault energy in Fe-based alloys[J]. Science in China(Technological Sciences), 2001, 44(4): 345-352. DOI: 10.1007/BF02916685 |
| |
| Authors: | WAN Jianfen CHEN Shipu XU Zuyao |
| |
| Affiliation: | School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China |
| |
| Abstract: | Temperature has great influence on the stacking fault energy (SFE). Both SFE and dr0/ d T for Fe-based alloys containing substitutional or interstitial atoms increase with increasing tempera-ture. Based on the thermodynamic model of SFE, the equation dr0/dT=drcn/dT+drseg/dT+drMG/dT and thoseexpressions for three items involved are established. The calculated dr0/dT is generally consistent with the experimental. The influence of chemical free energy on the temperature dependence of SFE is almost constant, and is obviously stronger than that of magnetic and segregation contributions. The magnetic transition and the segregation of alloying elements at stacking faults cause a decrease in SFE of the alloys when temperature increases; that is, drMG/dT<0 and dyseg/dT<0. Meanwhile, such an influence decreases with increasing temperature, except for the drseg/d 7 of Fe-Mn-Si alloys. With these results, the experimenal phenomena that the SFE of Fe-based alloys is not zero at the thermo-dynamically equilibrated temperature ( T0) of the r and e phases and they are positive both at T>T0 and T
|
| |
| Keywords: | stacking fault energy(SFE) temperature Fe-based alloys segregation magnetic contribution. |
| 本文献已被 CNKI 万方数据 SpringerLink 等数据库收录！ |
