Results 71 to 80 of about 2,013,900 (214)

Tailoring Laser Powder Bed Fusion and Post‐Processing Parameters for JIS SKD61 Tool Steels: Surface Roughness, Microstructure, and Mechanical Properties

steel research international, EarlyView.
Laser powder bed fusion of JIS SKD61 tool steel is systematically optimized using a Taguchi design and ANOVA. Hatch spacing and layer thickness are identified as dominant parameters controlling surface roughness and tensile strength. Subsequent tempering at 600°C improves microstructural stability and mechanical performance, enabling high‐density SKD61
Masrurotin Masrurotin, Andi Ard Maidhah, Maziar Ramezani, Wojciech Macek, Cho‐Pei Jiang   +4 more
wiley   +1 more source

Crystallography, Morphology, and Martensite Transformation of Prior Austenite in Intercritically Annealed High-Aluminum Steel

, 2018
The crystallography and morphology of the intercritical austenite phase in two high-aluminum steels annealed at 850 °C were examined on the basis of electron backscattered diffraction analysis, in concert with a novel orientation relationship ...
V.-T. Kuokkala, P. Peura, T. Nyyssönen, Kuokkala, V.-T., Peura, P., Nyyssönen, T.   +5 more
core   +1 more source

Toward the Application of Multiaxial Failure Criteria: Mean Stress Sensitivity of Carbide‐Rich, High‐Alloy PM‐HIP Tool Steels Under Axial and Torsional Cyclic Loading

steel research international, EarlyView.
This study quantifies axial and torsional long‐life fatigue (LLF) behavior of three carbide‐rich PM‐HIP tool steels, correlating LLF strength with intrinsic defect size and cleanliness, thereby extracting material‐specific mean stress sensitivities and Haigh diagrams.
Lennart Mirko Scholl, Frederik Tegeder, Tobias Hajeck, Alexander Bezold, Christoph Broeckmann   +4 more
wiley   +1 more source

Influences of Cleanliness, Carbide Size, Hardness, and Residual Stresses on Long‐Life Fatigue Strength and Crack‐Initiation Mechanisms in Carbide‐Rich Cold‐Work Tool Steels Using Normalized S–N Curves and Database‐Driven Validation of Murakami's √Area Model

steel research international, EarlyView.
Rotating‐bending fatigue tests on AISI D2 and AISI A11 quantify how cleanliness, carbide structure, hardness, and fabrication‐induced compressive residual stresses govern long‐life fatigue at NG = 107 cycles. Statistical fracture‐surface analysis and extreme‐value √area statistics link crack‐initiators to LLF strength.
Lennart Mirko Scholl, Frederik Tegeder, Dhirendar Chauhan, Bengt Hallstedt, Tobias Hajeck, Alexander Bezold, Christoph Broeckmann   +6 more
wiley   +1 more source

Effects of austenite conditioning on austenite/ferrite phase transformation of HSLA steel

, 2004
Effects of surface area of prior austenite grain boundaries and deformation bands on austenite/ferrite phase transformation of high strength low alloy (HSLA) steel during hot working were investigated through simulated hot workings using Gleeble 1500 ...
Choi, JK, Choo, WY, Bae, YH, Hong, Soon-Hyung, Lee, JS   +4 more
core   +1 more source

The effect of aluminium and phosphorus on the stability of individual austenite grains in TRIP steels [PDF]

, 2009
We have performed in situ synchrotron X-ray diffraction experiments to assess the influence of aluminium and phosphorus on the austenite stability in low-alloyed transformation-induced plasticity steels during the high-temperature bainitic holding and ...
Jimenez-Melero, E.; id_orcid, van Dijk, N. H., Offerman, S. E., Wright, J. P., van der Zwaag, S., Zhao, L., Jimenez-Melero, E., Sietsma, J.   +7 more
core   +1 more source

Transformation Mechanism of Undercooled Austenite and Deformation Behavior of a 1.2 GPa High-Strength Medium Mn Steel

Crystals
In this study, the phase transformation mechanism during the decomposition of undercooled austenite and its effect on the deformation behavior of a high-strength medium Mn steel were studied.
Ying Dong, Jiachen Xu, Lingming Meng, Qinghao Miao, Haobo Cui, Jiaxin Chen, Yu Du, Tao Liu, Qingdong Feng, Chengjun Zhu   +9 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

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

The effect of microalloying elements on prior austenite grain growth of low-carbon slab material [PDF]

, 2019
The effect of microalloying elements on the prior austenite grain growth of slab materials during slab reheating has been investigated. The investigated materials were laboratory castings with two levels of carbon (0.05 and 0.09 wt.%) and different ...
Kaijalainen, A. (A), Porter, D. (D), Hannula, J. (J), Kömi, J. (J)   +3 more
core   +2 more sources