Results 61 to 70 of about 10,228 (247)

As-cast microstructure and homogenization kinetics of a typical hard-to-deform Ni-base superalloy

Journal of Materials Research and Technology, 2023
In this paper, the as-cast microstructure, microsegregation, and the kinetics of (γ+γ′) eutectic phase and Laves phase dissolution in GH4151 alloy were studied by the optical microscope (OM), scanning electron microscope (SEM), electron probe ...
Lei Jia, Heng Cui, Shufeng Yang, Shaomin Lv, Xingfei Xie, Jinglong Qu   +5 more
doaj   +1 more source

The Influence of Specimen Thickness on the High Temperature Corrosion Behavior of CMSX-4 during Thermal-Cycling Exposure [PDF]

, 2007
CMSX-4 is a single-crystalline Ni-base superalloy designed to be used at very high temperatures and high mechanical loadings. Its excellent corrosion resistance is due to external alumina-scale formation, which however can become less protective under ...
B. A. Pint, C. E. Lowell, D. Monceau, D. Poquillon, G. Strehl, H. E. Evans, H.-J. Christ, I. Gurrappa, J. L. Smialek, J. L. Smialek, P. Y. Hou, R. Orosz, R. Orosz, R. Orosz, U. Krupp, U. Krupp, V. K. Tolpygo   +16 more
core   +3 more sources

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys

Advanced Engineering Materials, EarlyView.
Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak, Olha Zvirko, Rostyslav Leshchak, Hryhoriy Nykyforchyn   +3 more
wiley   +1 more source

Characterisation of the relationship between surface texture and surface integrity of superalloy components machined by grinding [PDF]

, 2013
The surface texture of a machined component is influenced largely by the processing parameters used during machining and hence, there is a relationship between both the formation of the surface texture and surface integrity of the machined component.
Liu, Geng, Liu, Lan, Qin, Yi, Zeng, Quanren   +3 more
core  

Life prediction of a Ni-base superalloy

Bulletin of Materials Science, 2011
Rene 80 samples were creep–rupture tested in air between 1144 and 1255 K at various stress levels. The mean stress exponent, n, and the mean activation energy for creep were calculated from the experimental results. The accelerated creep life of the alloy was evaluated by using iso-stress parametric equations and Monkman–Grant method.
M AGHAIE-KHAFRI, M NOORI
openaire   +2 more sources

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

Strength of nanoporous Ni-based superalloy membranes

Journal of Physics: Conference Series, 2010
Nanoporous Ni-based superalloy membranes are a new material class. They are fabricated from the two phase γ/γ' base material by thermomechanical processing, followed by selective phase extraction. Compared to other metallic membrane materials, they stand out due to an extremely regular and fine channel-like porosity on the nanoscale.
J Rösler, O Näth
openaire   +1 more source

Mechanical Properties of Powder Injection Molded Ni-Based Superalloys [PDF]

Advanced Materials Research, 2011
This paper describes the microstructural and mechanical properties of powder injection moulded (PIM) Ni based superalloys. Ni-based superalloys were mixed with a polymeric binder (paraffin wax, carnauba wax, stearic acid and PP) and injection moulded as standard tensile bars. The critical powder loading for injection moulding were 62.5 vol.
Gulsoy, H. Ozkan, Ozbek, Sunullah, Gunay, Volkan, Baykara, Tarik   +3 more
openaire   +2 more sources

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

Advanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter, Andreas Bezold, Johan Westraadt, Katharina Fiegl, Subham Chattoraj, Benjamin Wahlmann, Carolin Körner, Michael Mills, Mathias Göken, Steffen Neumeier   +9 more
wiley   +1 more source