激光喷丸IN718镍基合金的高温晶粒演变规律及析出相分析

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摘要：为了研究激光喷丸I718铢基合金的高温晶粒演变规律及其高温析出相，开展了不同功
率密度的激光喷丸强化试验，并对激光喷丸试样进行高温保持试验，对比分析了不同温度和激
光功率密度作用下试样的显微硬度以匕外，通过扫描电子显微镜(SEM)观测了试样的晶粒形貌，
并采用能谱仪(EDS)对IA718合金的高温析出相进行分析.研究结果表明，高温保持冷却后试样
基金资助项目(2018M630526)；
省
“六
才高峰”高次人才
养资助项目(GDZB - 050 )；
省
工
测与控制重点建设实验室开放课题
(JSKLEDC201503)；江苏大学“青年骨干教师培养工程”资助项目(2016016)
第一作者简介：黄舒(1983一),女，
东 ，副研究员，
(huangshu11@ ),主要从事激光特种加工及材料疲劳特
排灌机械工程学报 Journal of Drainage and Irrigation Machinery Engineering
2019 年 8 " 第37卷第8期 Aug. 2019 Vol.37 No.8
IN718
及析
的高温晶粒 分析
黄舒，刘牧熙*，胡晓奇，李红宇，胡磊
(江苏大学机械工程学院，
中图分类号：TN249 文献标志码：A 文章编号：1674-8530(2019)08-0730-07
Do/ 10N969/j王sn.1674-8530.19因018
开放科学(资丸IN718鎳基合金的高温晶粒演变规律及析出相分析[J].排灌机械工程学报,2019,37(8) #730-736. HUANG Shu, LIU Muxi, HU Xiaoqi, rt al. Analysis of grain evolution and precipitated phase in IN718 alloy subjected to laser perf ning at elevaten temperature] J]. Joursai of drainage and irrigation machinery engineering(JDIME) , 2019,37(8) #730-736.( in Chinese)
的显微硬度值高于常温，且在700 °C下激光喷丸试样表层显微硬度(HH)最高达到348；激光喷
丸试
的45 (m减小到20〜30 (m,而在高温保持后
增
35 (m左
右；随着温
，I718 料内部%
增多，
TP析出.最终，根据高温环境下
演变规律和
，提 了激光 IN718合金的高温强化机制.
关键词# I718合金;激光喷丸；高温；晶粒演变；析出相
(School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China)
Abstract: In order to study the grain evolution and precipitated phase of I718 —loy treated by laser peening ( LP ) holding at elevated temperature, the LP experiment of di/xent power density and hightempe&atu ehoedingtestweeca ied out.Themicoha&dnesotthesampeesatditeenttempeatu&es and laser power density was analyzed. In addition, the grain $00-010X0 of the samples was observed by Scanning Electron Microscope ( SEM) , and the high-temperature precipitated phase of I718 —loy was analyzed by Energy Dispersive Spectrometer ( EDS). The results show that the micmhardnxs of the LPed samples is higher than that of untreated samples, and the microhardnxs of the LPed samples is /ached the maximum value of 348 at 700 C. The grain size of the LPed samples is reduced from the o/ginal 45 (m to 20-30 (m, and increased to 35 (m a—er the high-temperature holding test. As the temperature rising, the % precipitated phase in the I718 mate/al increases gradu—/, and the p/cipi-
Analysis of grain evolution and preciritated phase in IN718 alloy subjected to laser peening at elevated temperathre
HUANG Shu, LIU Muxi * , HU Xiaoqi , LI Hongyu, HU Lei
收稿日期：2019-02-22&修回日期：2019-03-21；网络出版时间：2019-04-03
网络出版地址：/kcms/detaii/32.1814.FH.20190403.1118.002.ht—l
基金项目：国 自
基金资助项目(51775252, 51405204)；中国