Results 11 to 20 of about 518 (155)

Pathway for a martensitic quartz–coesite transition [PDF]

Scientific Reports
An atomistic pathway for a strain-induced subsolidus martensitic transition between quartz and coesite was found by computing the set of the smallest atomic displacements required to transform a quartz structure into a coesite structure.
Tim Schaffrinna, Victor Milman, Björn Winkler   +2 more
doaj   +2 more sources

Diffusionless isothermal omega transformation in titanium alloys driven by quenched-in compositional fluctuations [PDF]

Physical Review Materials, 2019
In titanium alloys, the $\ensuremath{\omega}$(hexagonal)-phase transformation has been categorized as either a diffusion-mediated isothermal transformation or an athermal transformation that occurs spontaneously via a diffusionless mechanism. Here we report a diffusionless isothermal $\ensuremath{\omega}$ transformation that can occur even above the ...
Masakazu Tane, Hiroki Nishiyama, Akihiro Umeda, Norihiko L. Okamoto, Koji Inoue, Martin Luckabauer, Yasuyoshi Nagai, Tohru Sekino, Takayoshi Nakano, Tetsu Ichitsubo   +9 more
openalex   +3 more sources

The Effect of Dislocation Substructure and Decomposition on the Course of Diffusionless Transformations [PDF]

Le Journal de Physique IV, 1995
The mechanical properties (yield strength, hardness, transformation stresses) and the transformation temperatures of SMA can be affected by the combination of different solid-state reactions. In this context the combination of local change in chemical composition by precipitation processes and the rearrangement of defects by recovery and ...
D. Treppmann, Erhard Hornbogen
openalex   +3 more sources

Twinning and Diffusionless Transformations in Metals by E. O. Hall [PDF]

Acta Crystallographica, 1954
A. J. C. Wilson
  +4 more sources

TRIP/TWIP Networks Promoted via Multifunctional Nanoprecipitates-confined Specified Shear for Achieving Strong-yet-Ductile Titanium Alloys. [PDF]

Adv Sci (Weinh)
Comprehensive theoretical calculation methods are employed for composition design to manipulate precipitates with deformation heterogeneity for facilitating TRIP/TWIP effects. Selected alloy exhibits dense TRIP/TWIP networks at > 830 MPa yield stress and record yield strength‐ductility synergy in titanium alloys. The results offer an individual pathway
Zhang X, Wang S, Chen R, Hua M, Xu W, Wang H, Yin S.   +6 more
europepmc   +2 more sources

Present Studies and Future Problems on Displasive and Diffusionless Phase Transformations.

Materia Japan, 1997
Kenichi Shimizu
openalex   +3 more sources

Mechanism of phase transition from OLCs with different structures to nPCD at high temperature and high pressure

Journal of Materials Research and Technology, 2023
The molecular dynamics (MD) calculation and experimental research methods were used to study the phase transition from onion-like carbon (OLC) with and without a diamond crystal core to nano-polycrystalline diamond (nPCD) under high temperature and high ...
Lifeng Dai, Yanguo Li, Qin Zou, Wenqi Luo, Haibo Ren, Xihui Ye, Yongan Luo, Wantang Fu   +7 more
doaj   +1 more source

Extremely rapid age hardening behavior in solution treated Ti-5Al-2Fe-3Mo [PDF]

MATEC Web of Conferences, 2020
To grasp age hardening and phase transformation behaviors in a β rich α+β type titanium alloy, Ti-5Al-2Fe-3Mo, during aging at 300-500°C after the solution treatment at high α+β temperature.
KUNIEDA Tomonori, FUJII Hideki, TAKAHASHIa Kazuhiro   +2 more
doaj   +1 more source

Twin Toughening-Driven Martensitic Transformation Strategy Synergistic Improvement for Plasticity-Thermal Shock Resistance of (Hf─Zr─Ti)C Ceramic Coating in Severe Thermal Environments. [PDF]

Adv Sci (Weinh)
A “ceramic self‐toughening strategy” is introduced for enhancing the plasticity and thermal shock resistance of (Hf─Zr─Ti)C coatings through twin toughening‐driven martensitic transformations in oxide scales. It facilitated the formation of stable, dense, and high‐toughness oxide scales after repeat ablation, and endowed prepared coatings with superior
Li J, Zhang Y, Fu Y, Li T, Zhang J, Yang D, Cao L, Lu F, Zhao J, Lv J, Li H.   +10 more
europepmc   +2 more sources

Multi-modal strain mapping of steel crack tips with micrometre spatial resolution. [PDF]

J Synchrotron Radiat
Multi‐modal measurements combining X‐ray diffraction, X‐ray fluorescence and optical microscopy allow dynamic crystal recovery effects around martensitic steel crack tips to be studied. The measured strain field around the crack tip shows a significant departure from the predictions of linear elastic fracture mechanics.Due to their superior fatigue ...
Khaliq A, Wittwer F, Wildeis A, Hartmann M, Thimm M, Brandt R, Brueckner D, Garrevoet J, Falkenberg G, Modregger P.   +9 more
europepmc   +2 more sources