Powder Reuse and Its Effects on Laser Based Powder Fusion Additive Manufactured Alloy 718

2016 ◽  
Vol 9 (2) ◽  
pp. 209-213 ◽  
Author(s):  
Brian A. Hann
Keyword(s):  
Alloy 718 ◽  
Powder Fusion

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.

Weldability of superalloys alloy 718 and ATI® 718Plus™ – A study performed by Varestraint testing

2017 ◽  
Vol 59 (9) ◽  
pp. 769-773 ◽  
Author(s):  
Jonny Jacobsson ◽  
Joel Andersson ◽  
Anssi Brederholm ◽  
Hannu Hänninen
Keyword(s):  
Alloy 718 ◽  
Varestraint Testing

A Novel Method of Estimating the Laves Phase in Electron Beam Welded Alloy 718

2008 ◽  
Vol 45 (6) ◽  
pp. 271-282
Author(s):  
K. Sivaprasad ◽  
S. Ganesh Sundara Raman ◽  
A. Sambasiva Rao
Keyword(s):  
Electron Beam ◽  
Laves Phase ◽  
Alloy 718 ◽  
Novel Method

Hot Cracking Susceptibility of Nickel Base Alloy 718

1997 ◽  
Vol 30 (3) ◽  
pp. 14
Author(s):  
V. Shankar ◽  
G. Srinivasan ◽  
B. G. Muralidharan ◽  
T. P. S. Gill ◽  
V. K. Sethi
Keyword(s):  
Base Alloy ◽  
Hot Cracking ◽  
Alloy 718 ◽  
Nickel Base Alloy ◽  
Nickel Base

High temperature oxidation and erosion behaviour of HVOF sprayed bi-layer Alloy-718/NiCrAlY coating

2019 ◽  
Vol 362 ◽  
pp. 366-380 ◽  
Author(s):  
Hitesh Vasudev ◽  
Lalit Thakur ◽  
Amit Bansal ◽  
Harmeet Singh ◽  
Sunny Zafar
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Alloy 718 ◽  
Temperature Oxidation ◽  
Erosion Behaviour ◽  
Nicraly Coating

scholarly journals Mitigation of anisotropic fatigue in nickel alloy 718 manufactured via selective laser melting

2019 ◽  
Vol 182 ◽  
pp. 108095 ◽  
Author(s):  
Volodymyr P. Sabelkin ◽  
Gregory R. Cobb ◽  
Travis E. Shelton ◽  
Megan N. Hartsfield ◽  
David J. Newell ◽  
...  
Keyword(s):  
Nickel Alloy ◽  
Selective Laser Melting ◽  
Alloy 718 ◽  
Laser Melting

scholarly journals Influence of Cold Rotary Swaging on Microstructure and Uniaxial Mechanical Behavior in Alloy 718

2021 ◽  
Author(s):  
Alexander Klumpp ◽  
Alexander Kauffmann ◽  
Sascha Seils ◽  
Stefan Dietrich ◽  
Volker Schulze
Keyword(s):  
Mechanical Behavior ◽  
Electron Backscatter Diffraction ◽  
Moderate Increase ◽  
Alloy 718 ◽  
Pronounced Increase ◽  
Rotary Swaging ◽  
Elastic Range ◽  
Nickel Based Superalloy ◽  
Tempering Treatment ◽  
Tension And Compression

AbstractIn this study, the influence of cold rotary swaging on microstructure and mechanical properties of the precipitation-strengthened nickel-based superalloy 718 (Alloy 718) was investigated. The initial stages of work-hardening were characterized by means of microhardness, electron backscatter diffraction (EBSD), and X-ray diffraction (XRD) analyses. Furthermore, attention was devoted to the mechanical behavior at ambient and elevated temperature (550 °C) in uniaxial tension and compression. Rotary swaging to different true strains of maximum $$\varphi = 0.91$$ φ = 0.91 caused a moderate increase of microhardness and enhanced markedly the load-bearing capacity in tension, giving rise to yield strength beyond 2000 MPa. The mechanical strength $$R_{p0.2}$$ R p 0.2 in tension subsequent to rotary swaging perfectly correlates with increasing dislocation density $$\rho $$ ρ estimated from XRD in the form of a Taylor-like relationship $$R_{p0.2} \propto \sqrt{\rho }$$ R p 0.2 ∝ ρ . In compression, transient stress–strain evolution without the occurrence of a clear elastic range and distinct yield phenomenon was observed. Restoration of the elastic range, accompanied by a pronounced increase of microhardness, was obtained by a post-swaging tempering treatment at 600 °C.

Sign in / Sign up

Export Citation Format

Share Document