Microstructure and creep strength of different γ/γ′-strengthened Co-base superalloy variants
Microstructure and creep strength of different γ/γ′-strengthened Co-base superalloy variants
复制标题
DOI：
10.1016/j.scriptamat.2010.08.036
复制
发表时间：
2010-12
影响因子：
6
通讯作者：
A. Bauer;S. Neumeier;F. Pyczak;M. Göken
中科院分区：
文献类型：
--
作者：
A. Bauer;S. Neumeier;F. Pyczak;M. Göken
研究了W、Ta、Ti、Nb、V、Si、Mo、Ir、Cr等元素对γ/γ′强化Co-Al-W合金高温性能的影响。所有合金均表现出γ/γ′组织，且γ′体积分数显著不同。W、Ta、Ti、Nb和V提高了γ′相体积分数和γ′相固溶温度。增加W含量和合金化的其他元素，除了Ir，降低了液相线温度。第一蠕变实验揭示了蠕变强度与多晶镍基高温合金和晶界强化的重要性。
The influence of W, Ta, Ti, Nb, V, Si, Mo, Ir and Cr on the high temperature properties of γ/γ′-strengthened Co–Al–W superalloys was investigated. All alloys exhibited a γ/γ′ microstructure with remarkably differing γ′ volume fractions. W, Ta, Ti, Nb and V increased the γ′ volume fraction and γ′ solvus temperature. An increased W content and alloying of additional elements, except Ir, decreased the liquidus temperature. First creep experiments revealed a creep strength comparable with polycrystalline Ni-base superalloys and the importance of grain boundary strengthening.