金属学报  1984, Vol. 20 Issue (5): 305-312

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Nb对Ni-Cr-Ti型变形高温合金稳态蠕变行为的影响

郭恩才;韩芷元;于树有

冶金工业部钢铁研究总院;齐齐哈尔钢厂研究所;齐齐哈尔钢厂研究所

INFLUENCE OF Nb ON STEADY-STATE CREEP BEHAVIOUR OF Ni-Cr-Ti TYPE WROUGHT SUPERALLOY

GUO Encai (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Belling); HAN Zhiyuan; YU Shuyou(Research Institute of Qiqihar Steel Works)(Manuscript received 17 August; 1982; revised manuscript 26 August; 1983)

郭恩才;韩芷元;于树有. Nb对Ni-Cr-Ti型变形高温合金稳态蠕变行为的影响[J]. 金属学报, 1984, 20(5): 305-312.
, , . INFLUENCE OF Nb ON STEADY-STATE CREEP BEHAVIOUR OF Ni-Cr-Ti TYPE WROUGHT SUPERALLOY[J]. Acta Metall Sin, 1984, 20(5): 305-312.

摘要 参考文献 相关文章 Metrics 全文: PDF(1011 KB)   摘要: Nb在合金中以大约5∶3∶1的比例分布在γ,γ′和碳化物相中,随着合金中Nb含量增加,应力指数m减小,Q_(app)增加,并满足关系式 Q_(app)=Be~(kx/lge) Nb降低合金晶粒度和γ基体堆垛层错能,稳态蠕变速率服从 _s∝L~b γ_SFE)~α Nb增加γ′相体积分数,颗粒半径和长程有序度。若引进有效应力(σ-σ_b)来描述稳态蠕变速率的应力关系,蠕变表达式为 _s=A_1L~bγ_(SFE)~α(σ-σ_b)~n0exp[-(Q_(app)/RT)]薄膜透射电镜观察表明:在(111)滑移面上α/2[10]全位错切割γ′相时被分解为α/6[11]和α/6[2]偏位错。测得超点阵位错对间距约为100—165,与所测得的γ′相颗粒尺寸相近。 Abstract：The distribution of Nb among γ, γ' and carbide phases is found to be about 5: 3: 1 in the Ni-Cr-Ti type wrought superalloy of various Nb contents. With the increasing content of Nb, the stress-exponent, n, decreases and the apparent creep activation energy, Q_(app), increases and fulfils the expression: Q_(app)=B e~(kx/lge) The grain size of the alloy and the stacking fault energy of γ matrix may be decreased by the Nb added. The steady-state creep rate, ε, obeys the following relationship: s∝L~bγ_(SFE)~α The volume fraction, the particle radius and the long range order of the γ'-phase may be also increased by the Nb added. If the effective stress(σ-σ_b) was introduced to describe the stress relationship of the steady-state creep rate, the typicalcreep equation may be: S=A_1L~bγ_(SFE)~α(σ-σ_b)~n 0exp(-(Q_(app)/RT)where σ_b is the average tensile stress opposing dislocation motion in creep. An observation on the thin foil specimens under TEM shows that the perfect dislocation α/2[10] cutting γ'-phase in glide plane (111) is resolved into two partial dislocations α/6-[11] and α/6[2]. The spacings of superlattice dislocation pairs examined are about 100—165  which fit in nearly with the measured particle size of γ'-phase. 收稿日期: 1984-05-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 郭恩才 韩芷元 于树有 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1984/V20/I5/305 1 Guo, E. C.; Ma, F. J., Superalloys 1980, Proc. of the Fourth Int. Syrup. on Superalloys, Eds. Tien, J. K.; Wlodek, S. T.; Morrow, H., IlI, et al., ASM, Metals Park, Ohio, 1980, p. 431． 2 陈篪;邓枝生;吴伯群;丁树深,物理学报,23(1974) ,69． 3 Ajaja, O.; Howson, T. E.; Purushothaman, S.; Tien, J. K., Mater. Sci. Eng., 44(1980) , 165． 4 Purushothaman, S.; Tien, J. K., Acta Metall., 26(1978) , 519． 5 Marcinkowrki, M. J. et al., Acta Metall., 9(1961) , 129．E No related articles found! Viewed Full text Abstract Cited   Shared      Discussed