检验腐蚀对镍基单晶高温合金力学性能的影响
Effect of Check Corrosion on Mechanical Properties of Nickel-base Single Crystal Superalloy
摘 要
在真空定向凝固炉中采用螺旋选晶法制备了一种镍基单晶高温合金棒材，研究了检验腐蚀对单晶高温合金在980 ℃下的拉伸性能和980 ℃/250 MPa下的持久性能的影响，并分析了其表面及断裂试样纵剖面显微组织。结果表明：镍基单晶高温合金在检验腐蚀的过程中，其枝晶间的腐蚀深度比枝晶干的大;随着腐蚀次数的增加，合金的表面粗糙度增大，枝晶间形成了腐蚀坑甚至腐蚀沟槽;腐蚀后合金的拉伸性能和持久性能均降低。
腐蚀
力学性能
single crystal superalloy
corrosion
mechanical property
Abstract
A kind of nickel-base single crystal superalloy was prepared by the screw selecting method in a directionally solidified furnace. The effect of standard blade check corrosion on the tensile properties at 980 ℃ and stress rupture properties at 980 ℃/250 MPa of the single crystal superalloy was investigated, and the surface microstructure and ruptured microstructure of the specimen was analyzed by SEM. The results show that the corrosion depth in the inter-dendrite region was deeper than that in the dendrite core during the corrosion process. With the increase of corrosion times, the surface roughness of the alloy increased. Some corrosion pits or grooves were formed in the inter-dendrite region. The tensile properties and stress rupture properties of the alloy decreased after check corrosion.
中图分类号 TG132.3 DOI 10.11973/jxgccl201511017
所属栏目 材料性能及其应用
基金项目
收稿日期 2014/9/28
修改稿日期 2015/7/16
网络出版日期
作者单位点击查看
备注史振学(1975-), 男, 山东曲阜人，高级工程师，博士。
引用该论文: SHI Zhen-xue,HAN Mei,LIU Shi-zhong,YU Jian. Effect of Check Corrosion on Mechanical Properties of Nickel-base Single Crystal Superalloy[J]. Materials for mechancial engineering, 2015, 39(11): 74～78
史振学,韩梅,刘世忠,喻健. 检验腐蚀对镍基单晶高温合金力学性能的影响[J]. 机械工程材料, 2015, 39(11): 74～78
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参考文献
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【2】胡壮麒，刘丽荣，金涛，等. 镍基单晶高温合金的发展［J］. 航空发动机, 2005, 31(3): 1-7.
【3】ARGENCE D, VERNAULT C, DESVALLEES Y, et al. MC-NG: Generation single crystal superalloy for future aeronautical turbine blades and vanes［C］// Superalloys 2000. Warrendale, PA: TMS, 2000: 829-837.
【4】YUTAKA K, TOSHIHARU K, TADAHARU Y. Development of next-generation Ni-base single crystal superalloys［C］// Superalloy 2004. Pennsylvania, PA: TMS, 2004: 35-44.
【5】SHI Z X, LI J R, LIU S Z, et al. Effect of LAB on the stress rupture properties and fracture characteristic of DD6 single crystal superalloy［J］. Rare Metal Materials and Engineer, 2012, 41(6): 962-966.
【6】SCHADT R, WAGNER I, PREUHS J, et al. New aspects of freckle formation during single crystal solidification of CMSX-4［C］// Superalloy 2000. Warrendale, PA: TMS, 2000: 211-218.
【7】STANFORD N, DJAKOVIC A, SHOLLOK B, et al. Seeding of single crystal superalloys-role of seed melt-back on casting defects［J］. Sripta Materialia, 2004, 50(1): 159-163.
【8】YANG X, NESS D, LEE P D, et al. Simulation of stray grain formation during single crystal seed melt-back and initial withdrawal in the Ni-base superalloy CMSX-4 ［J］. Materials Science and Engineering: A, 2005, 413/414: 571-577.
【9】FUCHS G E, BOUTWELL B A. Modeling of the partitioning and phase transformation temperatures of an as-cast third generation single crystal Ni-base superalloy［J］. Materials Science and Engineering：A, 2002, 333: 72-79.
【10】SHI Zhen-xue, LI Jia-rong, LIU Shi-zhong, et al. Effect of dendrite orientation on stress rupture properties of DD6 single crystal superalloy［J］. Journal of Iron and Steel Research(International), 2011, 18(10): 66-71.
【11】史振学，刘世忠，李嘉荣，等. 镍基单晶高温合金在高温氧化过程中不同角度晶界显微组织的演化［J］. 机械工程材料，2013, 37(12): 75-79.
【12】TIAN S G, ZHANG J H, ZHOU H H, et al. Aspects of primary creep of a single crystal nickel-base superalloy［J］. Materials Science and Engineering: A, 1999, 262(1): 271-278.
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