چکیده مقاله
In this paper, the influence of ageing heat treatment on the microstructure and amount of the eta η phase in A286 superalloy has been studied Artificial aging was performed at temperature range of 650 900°C for 1 30 hrs The precipitation of the η phase is investigated by means of optical microscopy, scanning electron microscopy, differential thermal analysis, and X ray diffractometry η phase has not been found after the samples being aged at 650°C and 720°C At 760°C for 8 hr, cellular η phase has been appeared at grain boundaries and the amount of it has been raised with increasing holding time This behavior continued up to 820°C Widmanstatten η started to nucleate at 820°C The η phase starts to precipitate at the expense of the gamma prime γ' phase A timetemperature precipitation diagram for the η phase is presented The results show the behavior of η precipitation at 840°C and 860°C is different and this behavior is discussed in the article
کلیدواژهها
نویسندگان
M. seifollahi
School of Materials and Metallurgical Engineering, Iran university of Science and Technology, Tehran, Iran
Sh. Kheirandish
School of Materials and Metallurgical Engineering, Iran university of Science and Technology, Tehran, Iran
S.H. Razavi
School of Materials and Metallurgical Engineering, Iran university of Science and Technology, Tehran, Iran
S.M. Abbasi
Department of Mechanical Engineering K N Toosi University of Technology
شیوه ارجاع
seifollahi, M. and Kheirandish, Sh. and Razavi, S.H. and Abbasi, S.M.,1390,The Effect of Aging Heat Treatment on the Microstructure and η Phase Precipitation in Iron Based A286 Superalloy,12th Iranian Conference on Manufacturing Engineering (ICME 2010),Tehran
ارائهشده در
مجموعه مقالات دوازدهمین کنفرانس ملی مهندسی ساخت و تولید ایران6 دی 1390 · تهران