退火处理对富Zr型Ti-Zr-Nb-Sn合金显微组织及性能的影响
Effect of annealing treatment on microstructure and properties of a high Zr-containing Ti-Zr-Nb-Sn alloy
炊鹏飞 1程尊鹏 2李春梅 2王晶 2郭婉莹 2景然 1李江华1
作者信息
- 1. 陕西理工大学材料科学与工程学院,陕西汉中 723000;陕西理工大学矿渣综合利用环保技术国家地方联合工程实验室,陕西汉中 723000
- 2. 陕西理工大学材料科学与工程学院,陕西汉中 723000
- 折叠
摘要
为了研究退火工艺对冷轧后Ti-49Zr-21Nb-1Sn合金显微组织及性能的影响,对其在850 ℃分别进行了 10、20和40 min的退火处理.借助光学显微镜、X射线衍射仪(XRD)、扫描电镜(SEM)、纳米压痕仪、电化学工作站及X射线光电子能谱(XPS)等研究了不同时间退火后合金的显微组织、力学性能及腐蚀性能.结果表明:随着退火时间的增加,合金的晶粒明显长大,相组成没有发生变化,为单一的β相,合金的弹性恢复轻微升高,塑性指数轻微降低.退火处理后合金的弹性模量、H/Er和H3/Er2值分别在88.4～94 GPa、0.0463～0.0479和0.0088～0.0103 GPa之间变化.极化曲线和阻抗图谱的分析结果表明,随着退火时间的增加,合金的自腐蚀电流密度逐渐增大,容抗弧半径减小,退火10 min时,合金的自腐蚀电流密度最小,容抗弧半径最大,表现出良好的耐蚀性.
Abstract
In order to investigate the effect of annealing process on microstructure and properties of Ti-49Zr-21Nb-1Sn alloy after cold rolling,it was annealed at 850 ℃ for 10,20 and 40 min,respectively.Microstructure,mechanical properties and corrosion performance of the alloy after annealing at 850 ℃ for different time were studied using optical microscope,X-ray diffractometer(XRD),scanning electron microscopy(SEM),nano indentation instrument,electrochemical workstation and X-ray photoelectron spectroscopy(XPS).The results show that with the increase of annealing time,the grain size of the alloy significantly grows,the phase composition remains unchanged,is single β phase,the elastic recovery of the alloy slightly increases,while the plasticity index slightly decreases.The elastic modulus,H/Er and H3/Er2 values of the alloy after annealing vary between 88.4-94 GPa,0.0463-0.0479,and 0.0088-0.0103 GPa,respectively.The analysis results of polarization curves and electrochemical impedance spectroscopy(EIS)show that with the increase of annealing time,the self-corrosion current density of the alloy gradually increases,and the capacitance arc radius decreases.When the annealing time is 10 min,the self-corrosion current density of the alloy is the smallest,and the capacitance arc radius is the largest,indicating good corrosion resistance.
关键词
Ti-Zr-Nb-Sn合金/退火处理/显微组织/纳米压痕/腐蚀性能Key words
Ti-Zr-Nb-Sn alloy/annealing treatment/microstructure/nano indentation/corrosion property引用本文复制引用
基金项目
国家自然科学基金(51701111)
陕西省自然科学基础研究计划项目(2018JQ5170)
陕西省教育厅科研计划项目(19JK0184)
陕西省教育厅科研计划项目(21JK0560)
出版年
2024
NETL
NSTL
万方数据