本文選題：鎳基單晶高溫合金 + 組織穩(wěn)定性��； 參考：《金屬學(xué)報》2017年03期

【摘要】：通過對3種不同W含量(6%、7%、8%,質(zhì)量分?jǐn)?shù))的第三代鎳基單晶高溫合金鑄態(tài)、熱處理態(tài)和熱暴露后的組織觀察和成分分析,研究了W對元素偏析、熱處理組織及熱暴露過程中組織演化的影響。結(jié)果表明:W含量的提高對合金元素的鑄態(tài)偏析、完全熱處理后的γ′相形貌、尺寸和體積分?jǐn)?shù)均無明顯影響。在950℃熱暴露過程中,W含量的提高抑制了γ′相的粗化,但加速了γ′相的連接變形。3種合金在熱暴露過程中析出的TCP相主要為m相和s相,且TCP相析出量隨W含量的增加而緩慢增大。此外,3種合金在1000℃熱暴露時TCP相析出量最大,在950℃熱暴露時次之,在1050℃熱暴露時析出量最小。
[Abstract]:The segregation of elements in the third generation nickel base single crystal superalloy was studied by observing the microstructure and composition of the third generation single crystal superalloy with different W content and mass fraction after heat treatment and thermal exposure. The effect of heat treatment on microstructure evolution during thermal exposure. The results show that the increase of w _ W content has no significant effect on the as-cast segregation of alloy elements, the morphology, size and volume fraction of 緯 'phase after complete heat treatment. The increase of W content at 950 鈩，

本文編號：1802220