Results 31 to 40 of about 6,769 (266)

Study of Fatigue Crack Growth in Superalloy Based on Acoustic Emission K-Entropy

Metals
Acoustic emission (AE) technology was used to monitor the fatigue crack growth process of superalloy. The analysis results show that both the cumulative values and the K-entropy values of AE parameters have good correspondences with the three stages ...
Ting Jing, Yang Yu, Qiang Liu
doaj   +1 more source

Small fatigue crack growth behavior of TB6 titanium alloy

Cailiao gongcheng, 2019
The growth behavior of naturally-initiated small cracks in single edge notched tensile (SENT) specimen of TB6 titanium alloy was studied. Fatigue experiments were conducted under constant amplitude loading with the stress ratios R of 0.1 and 0.5 at room ...
XU Liang, HUANG Shuang-jun, HUI Li, WANG Lei, ZHOU Song, ZHAO Qing   +5 more
doaj   +1 more source

Experimental and simulation study on Ⅰ-Ⅱ mixed-mode fatigue crack growth of TC4-DT welded joint

Journal of Aeronautical Materials, 2020
The crack growth in the structure shows the complex Ⅰ-Ⅱ mixed-mode under the combined tensile and shear fatigue loading. It is of great significance to understand its growth law for evaluating the fatigue life of structures accurately.
LIU Xiaogang, ZHU Xiaolin, GUO Haiding
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Constraint effect on corrosion fatigue crack growth behavior of A100 ultrahigh strength steel

Journal of Aeronautical Materials
Ultrahigh strength steel has been widely used to manufacture aircraft landing gear and other load-bearing structures，which is prone to corrosion fatigue failure when serving in harsh marine environment.
LI Yizhe, HUANG Hailiang, BIAN Guixue, WANG Andong, WANG Xi   +4 more
doaj   +1 more source

Effect of Interrupted Ageing and Retrogression-Reageing Treatments on Fatigue Crack Growth with a Single Applied Overload in 7050 Aluminum Alloy [PDF]

Materials Research, 2018
The influences of interrupted ageing and retrogression and re-ageing heat treatments on fatigue crack growth with a single applied overload in 7050 aluminum alloy were investigated.
André Luís Moreira de Carvalho, Juliana de Paula Martins   +1 more
doaj   +2 more sources

Relation between the Fatigue and Fracture Ductile-Brittle Transition in S500 Welded Steel Joints

Metals, 2022
The formation and propagation of cracks occur through irreversible dislocation movements at notches, material defects, and grain boundaries. Since this process is partly thermally controlled, the resistance to dislocation movements at low temperatures ...
Finn Sallaba, Franziska Rolof, Sören Ehlers, Carey Leroy Walters, Moritz Braun   +4 more
doaj   +1 more source

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

Effect of Microstructure on the Corrosion Fatigue Crack Growth of Low and Medium Steels

Advances in Materials Science and Engineering, 2022
This article studies the effect of microstructure on the corrosion fatigue crack growth behavior of low and medium carbon steels. 45 steel and 15CrMo were selected and five typical microstructures were obtained by different heat treatment processes.
Jing Wang, Yan Zhang, Chunting Yu, Bo Zhao   +3 more
doaj   +1 more source