Effect mechanism of rare earth Y on mechanical properties of TWIP steel

doi:10.13251/j.issn.0254-6051.2022.05.009

Abstract

Abstract: Effect of rare earth Y on mechanical properties and inclusions of a TWIP steel (22Mn-1.5Al-0.6C) was investigated by means of GNT universal testing machine and Sigma 300 field emission scanning electron microscope. The results show that after adding rare earth Y, the tensile strength of the tested steel increases from 725 MPa to 752 MPa, the yield strength increases from 290 MPa to 312 MPa, and the impact absorbed energy increases from 178.9 J to 207.7 J, while the hardness and elongation after fracture decrease slightly. The rare earth Y refines the TWIP steel grain, and the MnS, Al₂O₃ and MnS+AlN inclusions in the steel are modified into Y₂S₃, Y₂S₃+Y₂O₃, AlN+Y₂S₃. The inclusion analysis results show that the quantity and size of most inclusions decrease significantly, which is beneficial to the improvement of comprehensive mechanical properties of the tested steel.

Key words: TWIP steel, rare earth Y, inclusions, mechanical properties

CLC Number:

TG142.1

Liu Peng, Yang Jichun, Liu Xiangjun, Sun Mengxiang, Yang Changqiao. Effect mechanism of rare earth Y on mechanical properties of TWIP steel[J]. Heat Treatment of Metals, 2022, 47(5): 59-64.

References

[1]Rajib K, Satyam S. A novel way to enhance the strength of twinning induced plasticity (TWIP) steels[J]. Scripta Materialia, 2018, 154: 207-211.
[2]罗振轩, 荣建, 杨可, 等. 高强度汽车用钢发展与第3代汽车高强度钢的研究[J]. 汽车工艺与材料, 2015(4): 1-5.
Luo Zhenxuan, Rong Jian, Yang Ke, et al. Development of high strength automobile steel and research of the 3rd generation automobile high strength steel[J]. Automotive Technology and Materials, 2015(4): 1-5.
[3]米振莉, 薛瑶, 吴彦欣, 等. Al元素的添加对Fe-Mn-C系TWIP钢性能与延迟断裂的影响[C]//第九届中国钢铁年会会议集. 2013: 2296-2301.
Mi Zhenli, Xue Yao, Wu Yanxin, et al. Effect of Al addition on properties and delayed fracture in Fe-Mn-C TWIP steel[C]// The 9th China Iron and Steel Annual Conference Collection. 2013: 2296-2301.
[4]王玉昌, 兰鹏, 李杨, 等. 合金元素对Fe-Mn-C系TWIP钢力学行为的影响[J]. 材料工程, 2015, 43(9): 30-38.
Wang Yuchang, Lan Peng, Li Yang, et al. Effect of alloying elements on mechanical behavior of Fe-Mn-C TWIP steel[J]. Journal of Materials Engineering, 2015, 43(9): 30-38.
[5]杨志荣, 闫德胜, 杨怀君. 夹杂物对15MnB钢冲击性能的影响[J]. 金属热处理, 2020, 45(11): 32-37.
Yang Zhirong, Yan Desheng, Yang Huaijun. Effect of inclusions on impact performance of 15MnB steel[J]. Heat Treatment of Metals, 2020, 45(11): 32-37.
[6]李春龙. 稀土在钢中应用与研究新进展[J]. 稀土, 2013, 34(3): 78-85.
Li Chunlong. New development of research on rare earth application in steels[J]. Chinese Rare Earths, 2013, 34(3): 78-85.
[7]武佳妮. 稀土Y对船板钢及其大线能量焊接组织性能的影响研究[D]. 鞍山: 辽宁科技大学, 2020.
Wu Jiani. Effect of rare earth Y on microstructure and properties of ship plate steel and its high linear energy welding[D]. Anshan: University of Science and Technology Liaoning, 2020.
[8]李华基, 谭会辛, 祝阵超, 等. 富镧混合稀土对ZL101A合金组织和机械性能的影响[J]. 中国稀土学报, 1996(4): 34-47.
Li Huaji, Tan Huixin, Zhu Zhenchao, et al. Effect of La-rich rare earth compounds on the structure and mechanical properties of ZL101A alloy[J]. Journal of the Chinese Rare Earth Society, 1996(4): 34-47.
[9]王立辉, 刘祥东, 周文强, 等. 稀土含量对TRIP/TWIP钢晶粒及晶界特征的影响[J]. 武汉科技大学学报, 2017, 40(6): 401-407.
Wang Lihui, Liu Xiangdong, Zhou Wenqiang, et al. Effect of rare earth content on the grain and grain boundary features of TRIP/TWIP steels[J]. Journal of Wuhan University of Science and Technology, 2017, 40(6): 401-407.
[10]王斌, 易丹青, 周玲伶, 等. 稀土元素Y和Nd对Mg-Zn-Zr系合金组织和性能的影响[J]. 金属热处理, 2005, 30(7): 9-13.
Wang Bin, Yi Danqing, Zhou Lingling, et al. Influence of Y and Nd on microstructure and properties of Mg-Zn-Zr alloys[J]. Heat Treatment of Metals, 2005, 30(7): 9-13.
[11]姜宏伟, 张树玲, 陈炜晔, 等. 稀土钇对再生ADC12铝合金组织和抗压强度的影响[J]. 热加工工艺, 2018, 47(15): 79-82.
Jiang Hongwei, Zhang Shuling, Chen Weiye, et al. Effect of rare earth yttrium on microstructure and compressive strength of regenerated ADC12 aluminum alloy[J]. Hot Working Technology, 2018, 47(15): 79-82.
[12]Wang D, Lu X, Wan D, et al. Effect of hydrogen on the embrittlement susceptibility of Fe-22Mn-0.6C TWIP steel revealed by in-situ tensile tests[J]. Materials Science and Engineering A, 2021, 802: 140638.
[13]Li Q, Yang Z D, Xia C Q, et al. Effects of Y addition on microstructure and mechanical properties of Ti-25Zr alloys[J]. Materials Science and Engineering A, 2019, 748: 236-243.
[14]宋文杰, 董会萍, 刘洁, 等. 稀土钇对铸态Mg-8Li-3Al-3Zn合金显微组织和力学性能的影响[J]. 中国有色金属学报, 2021, 31(1): 1-8.
Song Wenjie, Dong Huiping, Liu Jie, et al. Effect of Y on microstructure and mechanical properties of as-cast Mg-8Li-3Al-3Zn alloy[J]. The Chinese Journal of Nonferrous Metals, 2021, 31(1): 1-8.
[15]Jin J E, Lee Y K. Effects of A1 on microstructure and tensile properties of C-bearing high Mn TWIP steel[J]. Acta Materialia, 2012, 60(4): 1680-1688.
[16]徐海峰, 史智越, 俞峰, 等. 合金元素对高氮不锈轴承钢组织与性能的影响[J]. 钢铁研究学报, 2021, 33(6): 539-550.
Xu Haifeng, Shi Zhiyue, Yu Feng, et al. Effect of alloy element on microstructure and properties of high nitrogen stainless bearing steel[J]. Journal of Iron and Steel Research, 2021, 33(6): 539-550.
[17]杨全海, 杨吉春, 丁海峰, 等. 稀土管线钢中夹杂物热力学分析及实验研究[J]. 稀土, 2018, 39(2): 96-101.
Yang Quanhai, Yang Jichun, Ding Haifeng, et al. Thermodynamic analysis and observation of inclusions in RE-pipeline steel[J]. Chinese Rare Earths, 2018, 39(2): 96-101.