电子显微学报
電子顯微學報
전자현미학보
JOURNAL OF CHINESE ELECTRON MICROSCOPY SOCIETY
2015年
4期
298-303
,共6页
刘程鹏%张晓娜%葛麟%李宪%王崇愚%于涛%张泽
劉程鵬%張曉娜%葛麟%李憲%王崇愚%于濤%張澤
류정붕%장효나%갈린%리헌%왕숭우%우도%장택
镍基单晶高温合金%SEM%γ′相尺寸%γ′相体积分数
鎳基單晶高溫閤金%SEM%γ′相呎吋%γ′相體積分數
얼기단정고온합금%SEM%γ′상척촌%γ′상체적분수
nickel-based single-crystal alloy%SEM%sizes of γ′phase%volume fraction of γ′phase
本文利用扫描电子显微镜( SEM),研究了Ni?Al二元模型镍基单晶高温合金在热暴露实验过程中γ′相尺寸与体积分数的变化。结果表明:随着热暴露时间的增加,一次γ′相尺寸明显增大,其长大机制为扩散控制的粗化机制(L?S?W理论)。其平均尺寸的立方与热暴露时间呈线性关系。通过对γ′相体积分数的统计显示,γ′相体积随热暴露时间的延长而减小,这是高温下γ相固溶度增加以及γ′溶解的结果,可以用Ni?Al二元相图来解释此现象。
本文利用掃描電子顯微鏡( SEM),研究瞭Ni?Al二元模型鎳基單晶高溫閤金在熱暴露實驗過程中γ′相呎吋與體積分數的變化。結果錶明:隨著熱暴露時間的增加,一次γ′相呎吋明顯增大,其長大機製為擴散控製的粗化機製(L?S?W理論)。其平均呎吋的立方與熱暴露時間呈線性關繫。通過對γ′相體積分數的統計顯示,γ′相體積隨熱暴露時間的延長而減小,這是高溫下γ相固溶度增加以及γ′溶解的結果,可以用Ni?Al二元相圖來解釋此現象。
본문이용소묘전자현미경( SEM),연구료Ni?Al이원모형얼기단정고온합금재열폭로실험과정중γ′상척촌여체적분수적변화。결과표명:수착열폭로시간적증가,일차γ′상척촌명현증대,기장대궤제위확산공제적조화궤제(L?S?W이론)。기평균척촌적립방여열폭로시간정선성관계。통과대γ′상체적분수적통계현시,γ′상체적수열폭로시간적연장이감소,저시고온하γ상고용도증가이급γ′용해적결과,가이용Ni?Al이원상도래해석차현상。
The change of γ′phase size and volume fraction in a Ni?Al binary model nickel?based single?crystal alloy during the thermal exposure treatment were investigated by the scanning electron microscopy. The results show that the primaryγ′precipitates grow up in size with the increase of thermal exposure time. The growth of γ′ precipitate is controlled by diffusion mechanism ( L?S?W mechanism) . The size ofγ′particles is proportional to the thermal exposure time t1/3 . The volume fraction ofγ′phase decreases with the increase of the thermal exposure time, which is due to γ′phase dissolution at high temperature. It can be explained by the Ni?Al phase diagram.