Results 41 to 50 of about 20,067 (256)

Effect of Quenching Cooling Method on Low-temperature Impact Toughness of 20Cr1Mo1VTiB High Temperature Bolting Steel

Teshugang, 2023
The effect of quenching cooling method on the mechanical properties of 20Cr1Mo1VTiB steel bar after overall heat treatment was studied through microstructure test methods such as mechanical property test， scanning electron microscope （SEM）， transmission ...
Gong Xueting, Zhao Jiqing, Yang Gang, Yang Bin   +3 more
doaj  

Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys

Advanced Engineering Materials, EarlyView.
Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak, Olha Zvirko, Rostyslav Leshchak, Hryhoriy Nykyforchyn   +3 more
wiley   +1 more source

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source

Effect of Segregation Band on the Microstructure and Properties of a Wind Power Steel before and after Simulated Welding

Metals
This article uses scanning electron microscopy (SEM) and electron back-scattering diffraction (EBSD) to study the effect of C and Mn segregation on the microstructure and mechanical properties of high-strength steel with 20 mm thickness used for wind ...
Xuelin Wang, Xiaoya Wang, Wenle Liu, Chengjia Shang   +3 more
doaj   +1 more source

Achieving superior low-temperature toughness in high-strength low-carbon steel via controlling lath boundary segregation

Journal of Materials Research and Technology, 2023
The optimal aging temperatures of 400–550 °C for high strength steels falls into the dangerous temperature range of temper-embrittlement. To obtain a good low-temperature toughness, temperatures above 600 °C are usually selected for aging treatments ...
Xinghao Wei, Lixin Sun, Zhongwu Zhang, Yang Zhang, Junhua Luan, Zengbao Jiao, Chain Tsuan Liu, Gang Zhao   +7 more
doaj   +1 more source

Low temperature impact toughness of structural steel welds with different welding processes

KSCE Journal of Civil Engineering, 2015
Influence of welding process and welding consumable on the impact toughness at low temperatures of the Heat Affected Zone (HAZ) and the weld metal in a structural steel weldment was investigated. A comparison of the low temperature impact toughness was made between the welded joints fabricated by Shielded Metal Arc Welding (SMAW) and Flux Cored Arc ...
Hyun-Seop Shin, Ki-Tae Park, Chin-Hyung Lee, Kyong-Ho Chang, Vuong Nguyen Van Do   +4 more
openaire   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source

TiN-containing high-heat-input welding steels: Optimizing Ti/N ratio and precipitation temperature for enhanced low-temperature impact toughness in coarse-grained heat-affected zones

Journal of Materials Research and Technology
To enhance the low-temperature impact toughness of the coarse-grained heat-affected zone (CGHAZ) in high-heat-input welding steels, TiN-containing steels with tailored Ti and N contents were designed.
Junjie Hao, Chao Wang, Hua Duan, Zhu Yan, Guo Yuan, Guo-dong Wang   +5 more
doaj   +1 more source

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

Advanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter, Andreas Bezold, Johan Westraadt, Katharina Fiegl, Subham Chattoraj, Benjamin Wahlmann, Carolin Körner, Michael Mills, Mathias Göken, Steffen Neumeier   +9 more
wiley   +1 more source

Impact Toughness Modification of NIST Low-Energy Charpy Verification Specimens for Testing at Room Temperature

Journal of Research of the National Institute of Standards and Technology, 2017
The possibility for the National Institute for Standards and Technology (NIST) to certify Charpy reference specimens for testing at room temperature (21 °C ± 1 °C) instead of −40 °C was investigated in a previous study, in which a slightly increased likelihood of specimen jamming was observed at the low-energy level (13 J to 20 J). Moreover, there is a
Enrico, Lucon, Ray L, Santoyo
openaire   +2 more sources