Results 101 to 110 of about 32,385 (274)

Martensite decomposition kinetics in additively manufactured Ti-6Al-4 V alloy: in-situ characterisation and phase-field modelling

open access: yes
Additive manufacturing of Ti-6Al-4V alloy via laser powder-bed fusion leads to non-equilibrium ′ martensitic microstructures, with high strength but poor ductility and toughness.
Tourret, D.   +8 more
core   +1 more source

Nonclassical austenite-martensite interfaces

open access: yes, 1997
In the last 10 years a new theory of martensitic transformations based on nonlinear elasticity has been developed and intensively studied by J.M. Ball and R.D. James and others. Microstructures are understood in the theory as minimizing sequences for the
Carstensen, C   +7 more
core   +1 more source

Interplay of Martensitic Phase Transformation and Plastic Slip in Polycrystals [PDF]

open access: yes, 2013
Inspired by key experimental and analytical results regarding Shape Memory Alloys (SMAs), we propose a modelling framework to explore the interplay between martensitic phase transformations and plastic slip in polycrystalline materials, with an eye ...
Richards, A. W.   +3 more
core   +1 more source

Additive Manufacturing of Hot‐Work Tool Steel by In Situ Alloying Using Laser Powder Bed Fusion and Directed Energy Deposition—Strategies to Improve Chemical Homogeneity

open access: yessteel research international, EarlyView.
To support future alloy development a powder mixture is processed by laser additive manufacturing. The powder mixture containing Mo‐ and W‐rich tracers is processed by powder bed fusion using single and double laser exposure and by directed energy deposition which provides drastically enlarged melt pools.
Felix Großwendt   +2 more
wiley   +1 more source

Magneto-Structural Properties of Ni2MnGa Ferromagnetic Shape Memory Alloy in Magnetic Fields

open access: yesMetals, 2013
The purpose of this review was to investigate the correlation between magnetism and crystallographic structures as it relates to the martensite transformation of Ni2MnGa type alloys, which undergo martensite transformation below the Curie temperature. In
Takuo Sakon   +2 more
doaj   +1 more source

Variant selection in surface martensite [PDF]

open access: yes, 2017
A significant variant selection is reported in isothermal martensite formed on the surface of an Fe–30% Ni sample. The selection phenomenon is modelled using different descriptions of the martensitic phase transformation. In particular, matrices based on
Cyril Cayron   +2 more
core   +1 more source

A Comparative Study of Directed Energy Deposition‐Arc and Casting: Enhancing Mechanical and Thermal Properties of Hot‐Work Tool Steels

open access: yessteel research international, EarlyView.
The study investigates the influence of DED‐Arc/M versus casting on the microstructure and material properties of X40CrMoV5‐1 (AISI H13) hot‐work tool steel. DED‐Arc/M yields finer microstructures, superior mechanical strength, and ductility, but slightly reduced thermal conductivity.
Ulf Ziesing   +4 more
wiley   +1 more source

MARTENSITE TRANSFORMATIONS IN Fe-Pd ALLOYS

open access: yes, 1982
Martensite transformations in Fe-Pd alloys have been extensively studied by means of X-ray diffractometry, optical and electron microscopy and Mössbauer effect. Successive martensite transformations were found in the Fe-Pd alloys with about 30at% Pd. The
R. Oshima, M. Sugiyama
core   +1 more source

Alloy Qualification for Producing Quench and Tempered Plate Steels with Extra‐Heavy Gage

open access: yessteel research international, EarlyView.
This study develops alloy concepts for ultraheavy steel plates (>100 mm) with ≥690 MPa yield strength. Through dilatometry and Jominy testing, the effects of Mo, Ni, and B on hardenability are quantified. A synergy between 0.5% Mo and 0.5%–1.0% Ni ensures core strength at low cooling rates, while boron microalloying suppresses ferrite and promotes ...
Xabier Azpeitia   +5 more
wiley   +1 more source

Spatial Martensite

open access: yes, 2016
The spatial distribution of martensite laths at different strained austenite grains has been thoroughly investigated by strain rate variation during tensile deformation of metastable austenitic stainless steel at ambient temperature.
Das, Arpan
core   +1 more source

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