Influence of interrupted ageing on the temporal evolution of the γ′ size distribution and the co-precipitation of γ" in alloy 718Plus

被引：13

作者：

Dash, Barun Bharadwaj ^{[1
]}

Dixit, Shubhashis ^{[1
]}

Boehlert, C. J. ^{[2
]}

Sundararaman, M. ^{[1
]}

Sankaran, S. ^{[1
]}

机构：

[1] Indian Inst Technol Madras, Dept Met & Mat Engn, Chennai 600036, India

[2] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA

来源：

MATERIALS CHARACTERIZATION | 2023年 / 206卷

关键词：

718Plus; Nickel-based superalloy; Bimodal distribution; Co-precipitation; Interrupted ageing; Gamma prime evolution; NICKEL-BASE SUPERALLOY; POWDER-METALLURGY; PRECIPITATION; PHASE; MICROSTRUCTURE; STABILITY; KINETICS; BEHAVIOR; AL;

D O I：

10.1016/j.matchar.2023.113394

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of interrupted ageing on the temporal evolution of gamma ' distribution in alloy 718Plus has been examined. Various bimodal gamma ' distributions were generated as a function of ageing duration, and the peak-aged distribution was identified through hardness tests. The volume fractions of the large and fine gamma ' precipitates evolved into a near 50:50% uniform distribution. The gamma '' precipitation succeeded the gamma ' precipitation during low temperature ageing. The nucleation of the gamma '' on gamma ' is explained on the basis of the Al + Ti to Nb ratio approaching the critical value in the matrix during the ageing treatment. The preferential nucleation site for the co precipitation of gamma '' is explained on the basis of lattice misfits of the gamma, the large and the fine gamma ', and the gamma '' phases.

引用

页数：16

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