|
| 稀土含量对TRIP/TWIP钢晶粒及晶界特征的影响 |
| Effect of rare earth content on the grain and grain boundary features of TRIP/TWIP steels |
| 投稿时间：2017-06-19 |
| DOI： |
| 中文关键词: 高锰奥氏体钢 TRIP/TWIP钢 TRIP效应 稀土 晶粒尺寸 重位点阵 晶粒取向差 晶界特征分布 |
| 英文关键词: high manganese austenitic steel TRIP/TWIP steel TRIP effect rare earth grain size CSL grain misorientation grain boundary distribution |
| 基金项目:“十三五”国家重点研发计划资助项目(2016YFB0101606). |
| 作者 | 单位 | E-mail | | 王立辉 | 宝钢股份中央研究院武汉分院,湖北 武汉,430080 | wlh337@163.com | | 刘祥东 | 宝钢股份中央研究院武汉分院,湖北 武汉,430080 | | | 周文强 | 宝钢股份中央研究院武汉分院,湖北 武汉,430080 | | | 魏琼 | 宝钢股份中央研究院武汉分院,湖北 武汉,430080 | | | 龚涛 | 宝钢股份中央研究院武汉分院,湖北 武汉,430080 | |
|
| 摘要点击次数: 4199 |
| 全文下载次数: 2514 |
| 中文摘要: |
| 利用XRD和EBSD分析稀土含量对TRIP/TWIP高锰钢相组成、晶粒及晶界特征的影响。结果表明,试验钢变形前组织以γ奥氏体为主,还有部分ε马氏体,经过塑性变形后,组织中还观察到少量α马氏体；随着稀土含量的增加,奥氏体转变为马氏体的量有所增加,表明稀土元素促进了试验钢的TRIP效应。此外,稀土元素的添加细化了试验钢中奥氏体晶粒,减少了小角度晶界数量而增加了大角度晶界数量,尤其是取向差为60°左右的大角度晶界；同时,稀土元素的添加也促进了低Σ值重位点阵(CSL)晶界特别是晶界的形成。 |
| 英文摘要: |
| The effects of rare earth (RE) content on the phase composition, grain and grain boundary features of high manganese TRIP/TWIP steels were analyzed by XRD and EBSD. The results show that, the microstructure of the tested steels before deformation mainly consists of γ-austenite and some ε-martensite, and a small amount of α-martensite is observed in the as-deformed steels. As the RE content increases, the amount of martensite transformed from austenite increases, indicating that RE can promote the TRIP effect of the tested steels. What’s more, the addition of RE can refine the austenite grains, reduce the amount of small-angle boundaries and increase the number of large-angle boundaries in the tested steels, especially the boundaries with misorientation angles about 60°. Meanwhile, the addition of RE also facilitates the formation of low Σ-value coincidence site lattice (CSL) grain boundaries, especially the Σ3 grain boundaries. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
