Results 111 to 120 of about 1,684,077 (260)

Abnormal superelastic cyclic behavior and stress-induced martensitic transformation mechanism of NiTi alloy with R phase

Journal of Materials Research and Technology
In this work, an abnormal phenomenon of the superelastic cycle in NiTi alloy with R phase is reported. The phase transformation of the 500°C-annealed-sample is B2-R-B19'.
Chengchuang Tao, Ge Zhou, Hongjun Huang, Chunzhe Fu, Bowen Zheng, Xiaojiao Zuo, Lijia Chen, Xiaoguang Yuan   +7 more
doaj   +1 more source

Microstructure Characterization of Bending Effects in 304L Stainless Steel Cladded with Low‐Alloy Steel Weld

steel research international, EarlyView.
Prebending of 304L/Q345R cladded plates significantly alters the subsequent weld thermal cycle and modifies the local interfacial microstructure. Combined electron backscatter diffraction (EBSD) and microscopy analysis demonstrates that deformation twinning, martensitic transformation, and defect initiation are concentrated at the trimaterial junction,
Ali Fahem, Elsiddig Elmukashfi, Hong Dong   +2 more
wiley   +1 more source

Martensite transformation in steels under impact load

, 2003
Shock loading influence on deformation martensite transformation is experimentally investigated in austenitic and perlitic steels with different grain size.
S.A. Atroshenko
core   +1 more source

Effect of Double Annealing on the Microstructure and Mechanical Properties of a Medium Manganese Steel

steel research international, EarlyView.
A double intercritical annealing strategy is proposed to tailor the multiphase microstructure and mechanical response of a medium‐Mn steel. The treatment produces an ultrafine mixture of ferrite, martensite and multiple austenite populations with graded thermal and mechanical stability, formed through austenite reversion and controlled retransformation.
Mattia Franceschi, Jose A. Jimenez, Carlos Garcia‐Mateo, Radhakanta Rana   +3 more
wiley   +1 more source

A Phase Stability Model for Martensite Transformation

, 1994
A phase stability model has been developed for martensitic phase transformation. Using a nonlinear differential equation associated with martensite transformation which is triggered by coherent phonons, stability boundaries & stability criterion are
Dogan , Ali
core  

The effect of Nb and O on the martensitic transformation in Ti–Nb–O alloys [PDF]

J Appl Crystallogr
Using a newly developed 2D X‐ray diffraction orientation simulation approach to isolate overlapping martensitic reflections, this study demonstrates that niobium controls continuous lattice symmetry evolution, whereas interstitial oxygen induces localized strain fields that nonlinearly govern the structural competition between α″‐martensite and the ...
Šalata K, Preisler D, Stráský J, Kozlík J, Horák L, Holý V.   +5 more
europepmc   +2 more sources

Insights Into Paint‐Bake Toughening of Resistance Spot Welds of a 2.0 GPa Warm‐Stamped Medium‐Mn Steel

steel research international, EarlyView.
Paint baking of resistance spot welded joints of 2.0 GPa warm‐stamped medium‐Mn steel activates low‐temperature tempering, forming fine cementite in the fusion zone and enhancing toughness. Crack propagation resistance increases, shifting the failure mode from partial interfacial to complete pullout, with peak load and energy absorption rising ...
Sunusi Marwana Manladan, Savyasachi Nellikode, YeoJin Jang, Sumin Lee, Dileep Chandran Ramachandran, Sung‐bo Heo, Jinyoung Lee, Young‐Kook Lee, Yeong‐Do Park   +8 more
wiley   +1 more source

A novel medium-carbon steel adapted to laser powder bed fusion: Microstructure, mechanical and wear properties

Materials & Design
Laser powder bed fusion (PBF-LB/M) is designed for the near-net-shape fabrication of complex tool steel parts. In high-carbon steels, however, its broader application is limited by crack formation arising from severe thermal gradients and from stresses ...
Zhengyi Jin, Mykhaylo Motylenko, Konrad Kosiba, Clemens Kunz, Cunliang Pan, David Rafaja, Julia K. Hufenbach   +6 more
doaj   +1 more source

Tailoring Microstructure and Hardness in Maraging 300 Steel via 2.4 wt.% Niobium Addition and Controlled Aging Treatments

steel research international, EarlyView.
High Nb (2.4 wt.%) addition to Maraging 300 steel drives lattice distortion and nanoscale Nb–Mo‐rich precipitation, confirmed by energy‐dispersive X‐ray spectroscopy mapping (Mo ~5.4 wt.%, Nb ~2.5 wt.%). Nanoindentation reveals strong matrix hardening (H >4.8 GPa) at 480°C aging, while 560°C induces ~1.92 vol.% reverted austenite, enabling tunable ...
Laylla Sharon B. Peixoto, Mohammad Masoumi, Luís Henrique N. de Lima, Marcos Natan da Silva Lima, Luis Flávio Gaspar Herculano, Isabel Ferreira de Barros, Geronimo Perez, Maria Vittoria Moraschini Reis, Hamilton Ferreira Gome Abreu, Marcelo J. Gomes da Silva   +9 more
wiley   +1 more source

High-resolution 4D visualization of deformation-induced martensitic transformation in a metastable austenitic steel by synchrotron X-ray nano-computed tomography

Mechanical Engineering Journal
Synchrotron X-ray nano-computed tomography (nano-CT) was employed to achieve high-resolution four-dimensional (3D + deformation step) visualization of deformation-induced martensitic transformation (DIMT) in a metastable austenitic steel during ...
Tatsuya IWANO, Osamu TAKAKUWA, Kyosuke HIRAYAMA, Hiroyuki TODA   +3 more
doaj   +1 more source