Results 71 to 80 of about 69,755 (267)

Effect of microstructure refinement on low cycle fatigue behavior of Alloy 718

MATEC Web of Conferences, 2014
Microstructure refinement down to d ∼ 0.1–1 μm is known to enhance processing properties of hard-to-deform materials and particularly can be used for facilitating superplastic forming or roll-forming. However refined microstructure can compromise service
Mukhtarov Shamil, Utyashev Farid
doaj   +1 more source

Effect of Temperature on Recrystallization Annealing Behavior of Drawn AZ31 Magnesium Alloy Wire

Journal of Harbin University of Science and Technology, 2019
In this paper, the tensile state AZ31 magnesium alloy wire with diameter of 13mm and deformation degree of 25% was used as raw material to study the influence of temperature on recrystallization annealing behavior of wire The results show that after ...
FANG Wen bin, WANG Dong wei, Zhang Xu dong, WANG Xin, LI Xue wen   +4 more
doaj   +1 more source

Finer-grained reductions in fine-grained hardness of approximation

Theoretical Computer Science
We investigate the relation between $δ$ and $ε$ required for obtaining a $(1+δ)$-approximation in time $N^{2-ε}$ for closest pair problems under various distance metrics, and for other related problems in fine-grained complexity. Specifically, our main result shows that if it is impossible to (exactly) solve the (bichromatic) inner product (IP) problem
Elie Abboud, Noga Ron-Zewi
openaire   +5 more sources

Slip Localization Intensification Mediated by Grain Boundary Sliding in a Polycrystalline Nickel‐Based Superalloy

Advanced Engineering Materials, EarlyView.
The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat, D. Anjaria, I. Woo, C. Bean, D. Texier, J. C. Stinville   +5 more
wiley   +1 more source

Research on domestic BARS cemented carbide anvil

Jin'gangshi yu moliao moju gongcheng, 2016
The basic principle of synthesizing of gem-grade diamond using pressless "split sphere" high-pressure apparatus(BARS)was introduced.The property of cemented carbide anvils placed in BARS was presented,as well as the industrializing process of Chinese ...
PENG Wen, PENG Wei, KONG Defang
doaj  

Tailoring Functional Properties of Ti–Ni–Cu Shape Memory Alloy Thin Films for MEMS Actuators

Advanced Engineering Materials, EarlyView.
A comprehensive study of critical parameters required to develop well‐performing Ti–Ni–Cu thin film shape memory alloy microactuators is provided. Materials science and device integration aspects are integrated by addressing structural and physical relationships using complementary characterization techniques as well as a practical fabrication solution
Elaheh Akbarnejad, Aleksander Kostka, Gowtham Arivanandhan, Yujiao Li, Alan Savan, Manfred Kohl, Alfred Ludwig   +6 more
wiley   +1 more source

Evaluation of near-threshold fatigue crack propagation in Ti-6Al-4V Alloy with harmonic structure created by Mechanical Milling and Spark Plasma Sintering

Fracture and Structural Integrity, 2015
Titanium alloy (Ti-6Al-4V) having a bimodal “harmonic structure”, which consists of coarsegrained structure surrounded by a network structure of fine grains, was fabricated by mechanical milling (MM) and spark plasma sintering (SPS) to achieve high ...
S. Kikuchi, T. Imai, H. Kubozono, Y. Nakai, A. Ueno, K. Ameyama   +5 more
doaj  

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

Optimizing Mg-4.5Tm-0.7Zr alloy performance through coarse-fine grain synergy via extrusion temperature control

Journal of Materials Research and Technology
The study investigates the effects of different extrusion temperatures on the microstructure and mechanical properties of Mg-4.5Tm-0.7Zr alloy. Among the tested extrusion temperatures, the microstructure of the alloy extruded at 380 °C was the most ...
Qiuyitong Zhang, Yihong Shao, Shengju Zhang, Yuanxiao Dai, Jie Liu, Yaobo Hu, Bin Jiang   +6 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