scholarly journals Precipitate Dissolution During Deformation Induced Twin Thickening in a Coni-Base Superalloy Subject to Creep

2021 ◽  
Author(s):  
Vassili A. Vorontsov ◽  
Thomas P. McAuliffe ◽  
Mark C. Hardy ◽  
David Dye ◽  
Ioannis Bantounas
Keyword(s):  
Precipitate Dissolution ◽  
Base Superalloy

The Kinetics of Precipitate Dissolution in a Nickel-Base Superalloy

2017 ◽  
Vol 48 (11) ◽  
pp. 5567-5578 ◽  
Author(s):  
S. L. Semiatin ◽  
N. C. Levkulich ◽  
A. E. Saurber ◽  
D. W. Mahaffey ◽  
E. J. Payton ◽  
...  
Keyword(s):  
Nickel Base Superalloy ◽  
Precipitate Dissolution ◽  
Nickel Base ◽  
Kinetics Of ◽  
Base Superalloy

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

Characterization of Coherent, Ordered Precipitates in Nickel-Base Alloys

1973 ◽  
Vol 31 ◽  
pp. 144-145
Author(s):  
B. H. Kear ◽  
J. M. Oblak
Keyword(s):  
Stable Phase ◽  
Nickel Base Superalloy ◽  
Alloy 718 ◽  
Commercial Alloy ◽  
Precipitate Morphology ◽  
Continuous Precipitation ◽  
Nickel Base ◽  
Base Superalloy ◽  
Strengthening Precipitate

A nickel-base superalloy is essentially a Ni/Cr solid solution hardened by additions of Al (Ti, Nb, etc.) to precipitate a coherent, ordered phase. In most commercial alloy systems, e.g. B-1900, IN-100 and Mar-M200, the stable precipitate is Ni3 (Al,Ti) γ′, with an LI2structure. In A lloy 901 the normal precipitate is metastable Nis Ti3 γ′ ; the stable phase is a hexagonal Do2 4 structure. In Alloy 718 the strengthening precipitate is metastable γ″, which has a body-centered tetragonal D022 structure.Precipitate MorphologyIn most systems the ordered γ′ phase forms by a continuous precipitation re-action, which gives rise to a uniform intragranular dispersion of precipitate particles. For zero γ/γ′ misfit, the γ′ precipitates assume a spheroidal.

The formation of intragranular stress concentration in plastic deformed Ni-base superalloy: Governing factors and process

2021 ◽  
Vol 806 ◽  
pp. 140820
Author(s):  
Xiaoqing Song ◽  
Yongxin Wang ◽  
Jing Zhang ◽  
Yanli Lu ◽  
Yifan Wang ◽  
...  
Keyword(s):  
Stress Concentration ◽  
Base Superalloy
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