ultra fine grain processed udimet alloy 718 for isothermal forging

Achievements|Chiba Laboratory|Deformation

Al alloy Materials Letters, 145 (2015) 15-18. doi: 10.1016/j.matlet.2014.11.059 Shi-Hai Sun, Yuichiro Koizumi, Shingo Kurosu, Yun-Ping Li, Akihiko Chiba Phase and grain size inhomogeneity and their influences on creep behavior of Co-Cr-Mo alloy additive

Critical Raw Materials Saving by Protective Coatings under

Novel manufacturing pathways via isothermal or nonconventional forging and powder metallurgical routes are currently under intensive research [79,80,81]. Recent advances on titanium aluminide have been done by Chen et al. who used a seedless growth approach to manufacture single crystals of a TiAl alloy with exceptional combination of ductility and strength, as well as resistance to creep up

Proceedings of the Korean Society for Technology of

But alloy 718's mechanical properties cause some problem to manufacturing profile ring like damage of material and mold. In this study, alloy 718's mechanical properties investigated for knowing its formability and using FE-Simulation for designing profile ring roll process and mold shape.


Gatorizing to near-net-shape full size disk was achieved using delta-processed fine-grained Alloy 718 billet (with grain sizes ASTM 9-12 from center to edge). A two-step forging process at sub-solvus temperature (954-968C) was shown suitable for a rotor disk of 60 cm in dia. and 8 cm. in thickness.


Sub-solvus dynamic recrystallization (DRX) mechanisms in an advanced gamma;-gamma;rsquo; nickel-based superalloy GH4151 were investigated by isothermal compression experiments at 1040 deg;C with a strain rate of 0.1 sminus;1 and various true strain of 0.1, 0.3, 0.5, and 0.7, respectively. This has not been reported in literature before. The electron backscatter diffraction (EBSD) and

Characterization of linear friction welded in

The focus of this thesis was to study the suitability of the linear friction welding (LFWing) process to manufacture or repair of Inconel 718 superalloy (IN 718) aero engine BLISKs. This was achieved by simulating a LFW joint made of (V) and in-service (IS) (from samples extracted from an actual turbine disk) IN 718 material. An in-depth microstructural characterization of the V and

8th International Symposium on SUPERALLOY 718 and

Superplastic Properties of Ultrafine-Grained Allvac 718Plus Alloy Processed by Multiple Forging S. Mukhtarov and V. Imayev 145 Fine Grain Structure as Palliatives for Fretting Wear of Inconel 718 Alloy at Various Temperatures..555 A. Amanov The Effect

Development of High Performance Ni

Fine strengthening phases following conservative slow cool from homogenization • 718-011: Al+Nb rich γ ' phase only • 718-027: compact γ '/ γ " coprecipitates • Concepts demonstrated in other alloy bases • Both alloys successfully billetized to produce fine

Proceedings of the Korean Powder Metallurgy Institute

However, ultra-fine WC powder usually causes extraordinary grain growth during sintering which weakens mechanical strength of ultra-fine grained cemented carbides. So we examined several kinds of WC powders to make new ultra-fine grained cemented carbides having superior performance.


Microstructure and creep anisotropy of Inconel 718 alloy processed by selective laser melting Materials Science and Engineering: A, Vol. 805 An integrated microporosity model of 3D X-ray micro-tomography and directional solidification simulations for Ni-based single crystal superalloys


THERMEC 2006 : supplement to THERMEC 2006, 5th International Conference on Processing and Manufacturing of Advanced Materials, July 4-8, 2006, Vancouver, Canada edited by T. Chandra [et al.] (Materials science forum, v. 539-543) Trans Tech pub., c2007 set pt. 1 pt. 2 pt. 3 pt. 4 pt. 5

Critical Raw Materials Saving by Protective Coatings under

Novel manufacturing pathways via isothermal or nonconventional forging and powder metallurgical routes are currently under intensive research [79,80,81]. Recent advances on titanium aluminide have been done by Chen et al. who used a seedless growth approach to manufacture single crystals of a TiAl alloy with exceptional combination of ductility and strength, as well as resistance to creep up

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Preprints is a multidisciplinary preprint platform that accepts articles from all fields of science and technology, given that the preprint is scientifically sound and can be considered part of academic literature. A Limiting Current O 2 sensor constituted of (CeO 2) 0.95 (Y 2 O 3) 0.05 as Solid Electrolyte Layer and (CeO 2) 0.75 (ZrO 2) 0.25 as Dense Diffusion Barrier Layer

Metallurgical and Materials Transactions A

Stress-Induced Grain Growth in an Ultra-fine Grained Al Alloy Time-Dependent Crack Growth Thresholds of Ni-base Superalloys Measurement and Modeling of Hydrogen Environment Assisted Cracking in Monel K-500 On the Modeling of the Diffraction Pattern


Superplasticity in a fine-grained tin alloy processed by multi-directional forging. Letters on Materials 5, no. 3 (2015): 313-318. Fariba Naghdi, Reza Mahmuodi, J.y Kang, and H.s. Kim. Contributions of different strengthening mechanisms to the shear strength of an extruded Mg–4Zn–0.5Ca alloy.


The influence of metallurgical factors on low cycle fatigue behavior of ultra-fine grained 6082 Al alloy 2018 International Journal of Fatigue 110, pp. 130-143 Bisht A., Dasgupta K., Lahiri D. Effect of graphene and CNT reinforcement on mechanical and thermomechanical behavior of epoxy—A comparative study 2018 Journal of Applied Polymer Science 135 (14), pp. 1-11


A study has been undertaken on the feasibility of the powder-metallurgy manufacturing process to fabricate β-type Ti–25Nb–25Zr alloy (mass%) for biomedical applications. The Ti–25Nb–25Zr alloy was fabricated from a mixture of TiH 2 with constituent elemental powders, and from a pre-alloyed Plasma Rotating Electrode Processed (PREP) Ti–25Nb–25Zr powder, separately.

Origin of plastic anisotropy in (ultra)

2018/1/24Origin of plastic anisotropy in (ultra)-fine-grained Mg–Zn–Zr alloy processed by isothermal multi-step forging and rolling: Experiments and modeling Author links open overlay panel Dayan Nugmanov a c Marko Knezevic b Milovan Zecevic b Oleg Sitdikov c Michael Markushev c

Finite element simulation and process optimization of

2018/11/30Young-Sang et al [] simulated the evolution of grain structure during the forging process of Inconel 718 superalloy two-step blade. And found that the microstructure prediction tool was validated by comparing the simulated grain structure with that of the experimental blade-type forging.


First, grain boundary car-bides, when properly formed, strengthen the grain boundaries, prevent or retard grain boundary sliding and permit stress relaxation along the grain boundaries. Second, a fine distribution of carbides precipitated within the grains increases strength; this is especially important in the cobalt based alloys that cannot be strengthened by γ' Precipitates.

Steels for bearings

Similar voids are found at the ends of the larger (primary) alloy-carbides in processed M50 steel (Table 8) []. If these are not healed in continued or subsequent processing then the voids or weakened interfaces must contribute to the initiation of fatigue damage and is one explanation why the refinement of grain size in M50 does not contribute to improved rolling contact fatigue performance

Effects of B on the Hot Ductility of Fe

AbstractThis work conducted systematic studies on the effect of B on the hot ductility behavior of Fe-36Ni alloy over the temperature range of 900–1,200 C by use of Gleeble-3500 thermal simulator, Thermo-Calc software, transmission electron microscopy and

Chinese Journal of Materials Research

Abstract For the delta process (DP) of GH4169 high temperature alloy, the effect of d phase content on its hot deformation behavior and evolution of microstructures was studied systematically by isothermal compression test with a strain rate range 0.005-0.1 s-1 at temperature range 950-1010 .at temperature range 950-1010 .

Mesoscale modeling and simulation of microstructure

Appl. Phys. A (2016)122:890 DOI 10.1007/s00339-016-0404-1 Applied Physics A (g CrossMark Materials Science Processing VQ/ Mesoscale modeling and simulation of microstructure evolution during dynamic recrystallization of a Ni-based superalloy Fei Chen1

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