Results 111 to 120 of about 2,468,475 (290)

Load Characteristics in the Cutting of Three Types of Bauxite by Conical Picks

Applied Sciences
Underground bauxite comprehensive mechanized mining has attracted growing attention, yet regional differences in bauxite characteristics challenge its applicability and economic efficiency. The conical pick, a key cutting tool for this mining method, has
Weipeng Xu, Bin Zhang, Nangeng Yue, Kuidong Gao, Ziyao Ma, Shengru Zhang, Xiaodi Zhang, Yu Bu   +7 more
doaj   +1 more source

Controlling Grain Growth in Powder Bed Fusion of Yttria‐Stabilized Zirconia Using Femtosecond Lasers: Challenges and Methodological Insights

Advanced Engineering Materials, EarlyView.
Binder‐free laser powder bed fusion of 8YSZ with a femtosecond laser is used to map process windows linking scan strategy, heat accumulation, and grain growth. Time‐resolved thermography and simulations reveal thermal regimes that enable continuous, vitrified, and fine‐grained 8YSZ surface layers without absorptive additives and demonstrate ...
Markus Kühn, Sarah Kaden, Andrea Barz, Daniel Störzner, Jens Bliedtner, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

Edward Scissor-hands or Jumping Jack-Flash the affectionately named Kaman K-Max helicopter dumps water on a spot fire east of Mount Franklin Road near Piccadilly Circus, [17 January 2003] [picture] /

, 2003
Title from caption list supplied by the photographer, see file NLA04/564.; Inscriptions: Signed by the photographer in pencil on reverse; "14-19"--in pencil on reverse.; Part of the collection: A blood red noon, photography of the Brindabella & southern ...
Cutting, Jeff, 1945-
core  

Investigating the Low‐Temperature Phase Stability of the Binary Ta–W System

Advanced Engineering Materials, EarlyView.
Atomistic simulations show that the binary Ta–W system forms ordered intermetallic phases, B2‐TaW and D03‐TaW3, as 0 K ground states. Configurational entropy, however, lowers the free energy of the disordered bcc solid solution, which becomes the stable phase above about 400 K.
Klemens Lechner, Anna Sophie Jelinek, Velislava Terziyska, Peter Wagatha, Wolfram Knabl, Christian Mitterer, Helmut Clemens, David Holec   +7 more
wiley   +1 more source

Study on the Mechanism of Stick-Slip Vibration Based on Single-Cutter Rock Breaking Finite Element Simulation

Shiyou jixie, 2021
The deep and complex formations in oil and gas exploration and development have the characteristics of high pore pressure, high temperature, high rock hardness, strong plasticity and poor drillability, which have brought many challenges to drilling ...
He Zhenguo, Shi Libao, Li Lingxi, Kong Lulin, Zhang Xiaoning, Liu Xinyun   +5 more
doaj  

3D‐Printed Titanium Gyroid Scaffold Structure Integrated With Tough Hybrid Materials for Cartilage Replacement

Advanced Engineering Materials, EarlyView.
This study proposes a potential device design for joint cartilage replacement. Silica‐polytetrahydrofuran (SiO2‐PolyTHF) hybrids with customizable mechanical properties were developed to mimic the characteristics of a natural meniscus. These were synthesized through a two‐pot sol–gel hybrid process.
Yu‐Chien Lin, Gloria R. Young, Francesca Tallia, Reece N. Oosterbeek, Shaaz Ghouse, Edward Spiers, Nupur Kohli, Tom Briggs, Marc Masen, Siwei Li, Ren‐Jei Chung, Jonathan R. T. Jeffers, Julian R. Jones   +12 more
wiley   +1 more source

Modeling and Analysis of a Cutting Robot for the “Excavation–Backfill–Retention” Integrated Mining and Excavation Equipment

Actuators
To meet the mining requirements of the ’excavation–backfill–retention’ tunneling method for inter-panel coal pillars, this paper proposes an integrated ‘excavation–backfill–retention’ equipment system centered on a cutting robot.
Hongwei Ma, Wenda Cui, Chuanwei Wang, Xusheng Xue, Qinghua Mao, Haotian Wang, Limeng Xue, Hao Su, Zukun Yu, Jiashuai Cheng, Yifeng Guo, Kexiang Ma   +11 more
doaj   +1 more source

Research on Cutting Load and Heat Generation Law of PDC Wearing Cutter

Shiyou jixie, 2021
At present, there is no further researches on the cutting load and heat generation of worn PDC cutter under different front rake angles and different wear grades. For this reason, single cutter cutting tests are used to verify the relevant performance of
Zhu Guanghui, Kuang Yuchun, Lin Wei
doaj  

Impact of the Process Atmosphere During Hot Isostatic Pressing on the Near‐Surface Composition of an Additively Manufactured Austenitic High‐Interstitial Steel

Advanced Engineering Materials, EarlyView.
A high interstital austenitic steel is additively manufactured and postdensified by HIP to eliminate gas porosity. Thereby, the loss of N and Mn in Ar HIP atmosphere is investigated. Further, HIP using N2 atmosphere is investigated which led to excessive nitride formation.
F. Großwendt, J. Hahn, J. Kimm, S. Weber, J. Lentz   +4 more
wiley   +1 more source

Large Cutting Depth and Layered Milling of Titanium Alloy Thin-Walled Parts. [PDF]

Materials (Basel), 2020
Zha J, Liang J, Li Y, Zhang H, Chen Y.
europepmc   +1 more source