中南大学学报（自然科学版）2012，Vol.43Issue(7)：2547-2553,7.
FGH95镍基合金组织结构对持久性能的影响
Influence of microstructure on enduring properties of FGH95 nickel-base superalloy
摘要
Abstract
By means of full heat treatment, microstructure observation, XRD diffraction analysis and enduring properties measurement, an investigation was made into the influence of microstructure on enduring properties of FGH95 superalloys. The results show that the quantities and size of the coarser γ' phase distribute in the regions decrease as the HIP temperature increases. With the HIP temperature increases to 1 180 ℃, the grain obviously grows up. After the HIP alloy is fully heat treated, the carbide particles discontinuously distribute along boundaries and in the grain, and the fine γ’ phase dispersedly precipitates in the matrix. After X-ray diffraction analysis, the lattice parameters of γ and γ’ phase increase slightly, but the misfit decreases gradually. Under the condition of 650 ℃ and 1 034 MPa, as the 1 120 ℃ HIP alloy which is fully heat treated has higher lattice misfit, the alloy possesses longer lifetime. During creep process, the deforming features of the alloy are dislocations slipping in the matrix, dislocations crossing or shearing into γ’ phase.关键词
FGH95合金/热等静压温度/组织结构/晶格常数/错配度/持久性能Key words
FGH95 superalloy/HIP temperature/microstructure/lattice parameters/misfit/enduring properties分类
矿业与冶金引用本文复制引用
谢君,田素贵,周晓明,李柏松..FGH95镍基合金组织结构对持久性能的影响[J].中南大学学报（自然科学版）,2012,43(7):2547-2553,7.基金项目
国家自然科学基金资助项目 (50571070) （50571070）
