电弧熔炼Ni-28.5Al-43V过共晶合金的组织与性能
发布时间：2018-09-17 18:50
【摘要】：采用真空电弧熔炼制备了Ni-28.5Al-43V成分的合金。对于真空电弧熔炼纽扣锭不同位置处微观组织及力学性能进行了研究。利用光学显微镜(OM),X射线衍射(XRD),扫描电镜(SEM),分析了合金不同凝固位置处的相组成和组织形态。结果表明,合金的凝固组织主要是由V相枝晶组织与NiAl+V片层共晶组成。同时对初生相及共晶相进行显微硬度测定。初生V相硬度(HV)在398~425之间,约为纯V硬度的3倍,表明V的固溶强化效果较为明显。另外,高温压缩强度与室温断裂韧度较NiAl合金均有很大提高,表明V的加入可提高NiAl合金的室温塑性与高温强度。
[Abstract]:The Ni-28.5Al-43V alloy was prepared by vacuum arc melting. The microstructure and mechanical properties of vacuum arc melting button ingot at different positions were studied. The phase composition and microstructure of the alloy at different solidification positions were analyzed by (OM) X ray diffraction (XRD),) scanning electron microscope (SEM),). The results show that the solidification microstructure of the alloy is mainly composed of V phase dendrite structure and NiAl V lamellar eutectic. The microhardness of primary phase and eutectic phase was also measured. The hardness of primary V phase (HV) is between 398 and 425, which is about 3 times of that of pure V, which indicates that the solution strengthening effect of V is obvious. In addition, the compression strength at high temperature and fracture toughness at room temperature are significantly higher than those of NiAl alloy, which indicates that the addition of V can improve the room temperature ductility and high temperature strength of NiAl alloy.
【作者单位】： 内蒙古科技大学材料与冶金学院;
【基金】：国家自然科学基金资助项目(51564041) 内蒙古自然科学基金资助项目(2014MS0518) 内蒙古科技大学产学研培育基金项目(PY201509) 内蒙古科技大学材料与冶金学院青年人才资助项目(2014CY012)
【分类号】：TG291
本文编号：2246794
[Abstract]:The Ni-28.5Al-43V alloy was prepared by vacuum arc melting. The microstructure and mechanical properties of vacuum arc melting button ingot at different positions were studied. The phase composition and microstructure of the alloy at different solidification positions were analyzed by (OM) X ray diffraction (XRD),) scanning electron microscope (SEM),). The results show that the solidification microstructure of the alloy is mainly composed of V phase dendrite structure and NiAl V lamellar eutectic. The microhardness of primary phase and eutectic phase was also measured. The hardness of primary V phase (HV) is between 398 and 425, which is about 3 times of that of pure V, which indicates that the solution strengthening effect of V is obvious. In addition, the compression strength at high temperature and fracture toughness at room temperature are significantly higher than those of NiAl alloy, which indicates that the addition of V can improve the room temperature ductility and high temperature strength of NiAl alloy.
【作者单位】： 内蒙古科技大学材料与冶金学院;
【基金】：国家自然科学基金资助项目(51564041) 内蒙古自然科学基金资助项目(2014MS0518) 内蒙古科技大学产学研培育基金项目(PY201509) 内蒙古科技大学材料与冶金学院青年人才资助项目(2014CY012)
【分类号】：TG291
【相似文献】
相关期刊论文 前3条
1 惠增哲;张甲;王慧;龙伟;李晓娟;;KF-BaTiO_3体系共晶领先相的判定[J];西安工业大学学报;2011年03期
2 张元;刘国怀;李新中;陈瑞润;苏彦庆;郭景杰;傅恒志;;生长速度对定向凝固Ti-46Al-2Cr-2Nb合金领先相及微观组织的影响[J];金属学报;2013年11期
3 ;[J];;年期
相关博士学位论文 前1条
1 张元;定向凝固Ti-46Al-2Cr-2Nb合金的领先相选择及其取向变化规律[D];哈尔滨工业大学;2013年
，本文编号：2246794
本文链接：https://www.wllwen.com/kejilunwen/jiagonggongyi/2246794.html
