摘要
对经历不同时间高温热暴露和高温应力持久试验的FGH97粉末高温合金,分别测定和计算了其密度、声速和模量,并对显微组织进行了分析,研究长时高温和高温应力持久对FGH97粉末高温合金密度、声速和模量的影响。结果表明:在高温和高温应力持久条件下,随着时间的增加,FGH97粉末高温合金的密度、声速及弹性模量均逐渐降低;在高温条件下,应力对各个特征参量的影响更为显著;显微组织随时间的变化主要有碳化物粗化,γ′相的形貌、体积分数和尺寸发生变化,以及热诱导孔洞、蠕变孔洞、微裂纹在晶内和晶界上出现。
The density,sound velocity and modulus of FGH97 PM superalloys were measured and calculated,which had passed through high temperature tests and high temperature stress endurance tests after various time.Meanwhile,the microstructure was also analyzed.The influence of long-term high temperature and stress on the density,sound velocity and modulus of FGH97 PM superalloys were researched.The results show that：under conditions of high temperature and high temperature stress,the density,sound velocity and elastic modulus of FGH97 PM superalloys decreased gradually with the increase of time;each characteristic parameter had a more outstanding change under high temperature stress endurance tests than high temperature tests;the time variation of microstructure were that the carbide coarsened,the morphology,volume fraction and size ofγ′phase changed,and the thermally induced porosity,creep cavity and microcracks appeared in the grains or on the grain boundaries.
作者
刘昌奎
陈锋
周静怡
魏振伟
陶春虎
LIU Changkui CHEN Feng ZHOU Jingyi WEI Zhenwei TAO Chunhu(AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China AVIC Failure Analysis Center, Beijing 100095, China Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation, Beijing 100095, China Aviation Key Laboratory of Science and Technology on Materials Testing and Evaluation, Beijing 100095, China Jiangsu Province Special Equipment Safety Supervision in Changzhou, Changzhou 213000, China)
出处
《理化检验（物理分册）》
CAS
2017年第9期629-634,共6页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
基金
航空科学基金资助项目(2013ZF21)
关键词
FGH97粉末高温合金
热暴露
高温应力持久
声速
模量
显微组织
FGH97 PM superalloy
heat exposure
high temperature stress endurance
sound velocity
modulus
microstructure
