Results 81 to 90 of about 133,825 (302)

Experimental study of the thermal reaming of the borehole by axial plasmatron [PDF]

, 2019
Purpose. To study rock spallation dynamics in the process of the borehole thermal reaming and analyze energy consumption of the borehole thermal reaming process by plasma jets of the axial plasmatron. Methods. Field experimental study of rock spallation
Dhunnoo, N, Potapchuk, I, Sekar, M, Voloshyn, O, Yemelianenko, V, Zhevzhyk, O, Zhovtonoha, M   +6 more
core   +1 more source

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

Research on Precise Identification of Rock Strength Based on Bolt Drilling Parameters

Energy Science & Engineering
During roadway excavation, the presence of weak interlayers and fractured rock masses significantly affects roof stability. To achieve timely and effective roadway support, it is crucial to identify and predict different rock types based on drilling ...
Qiang Zhu, Sheng Biao Wang, Da Jiang Wen, Chong‐Yu Song, Kang Zhou   +4 more
doaj   +1 more source

Effect of operating temperature on direct recycling aluminium chips (AA6061) in hot press forging process [PDF]

, 2013
A method of solid-state recycling aluminum alloy using hot press forging process was studied as well as the possibility of the recycled chip to be used as secondary resources.
Ahmad, Mohd Hafizi, Ayop, Osman, Faizol, Zulbirri, Jusoh, Muzammil, Majid, Huda A., Mat Saman, Norhafezaidi, Rahim, Mohamad Kamal A., Yusoff, Zubaida, Zubir, Farid   +8 more
core   +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

Drilling trajectory measurement method while drilling for drilling robot forrockburst prevention based on wireless electromagnetic transmission

Meitan kexue jishu
Drilling robot for rockburst prevention is a necessary equipment for achieving unmanned pressure relief in coal mines with high in-situ stress. Developing a reliable drilling trajectory measurement system while drilling is an important measure to ensure ...
Zhongbin WANG, Lei SI, Jinheng GU, Dong WEI, Jianbo DAI, Dezhong XIN, Xiufeng ZHANG, Hang CHEN, Fei XING   +8 more
doaj   +1 more source

Ultrasonic Planetary Core Drill: Overview and Results from Field Trial [PDF]

, 2017
In the effort to explore the subsurface of terrestrial bodies, we seek to obtain better samples from ever greater depths. Many organisations are working towards technologies that can achieve this goal whilst ensuring compatibility with the likely ...
Harkness, Patrick, Li, Xuan, Lucas, Margaret, Timoney, Ryan, Worrall, Kevin   +4 more
core  

An Experimental High‐Throughput Approach for the Screening of Hard Magnet Materials

Advanced Engineering Materials, EarlyView.
An entire workflow for the high‐throughput characterization and analysis of compositionally graded magnetic films is presented. Characterization protocols, data management tools and data analysis approaches are illustrated with test case Sm(Fe, V)12 based films.
William Rigaut, Pierre Le Berre, Hamdi Jaballah, Lukas Fink, Victor Poline, Richard Haettel, Stéphane Grenier, Gilbert Chahine, Ewen Bellec, Guillaume Buatier, Wilfried Hortschitz, Santa Pile, Thomas Schrefl, Nils Blanc, Yuan Hong, Thibaut Devillers, Nora M. Dempsey   +16 more
wiley   +1 more source

Anti-Vibration Method for the Near-Bit Measurement While Drilling of Pneumatic Down-the-Hole Hammer Drilling

Applied Sciences
Pneumatic down-the-hole (DTH) hammer drilling technology has been used extensively in the fields of heat reservoir exploitation and geological exploration owing to its advantages of high efficiency and low pollution.
Lu Wang, Wenchao Gou, Jun Wang, Zheng Zhou   +3 more
doaj   +1 more source

Downhole logging as a paeoceanographic tool on ocean drilling program leg 138: Interface between high-resolution stratigraphy and regional syntheses [PDF]

, 1992
On Ocean Drilling Program (ODP) Leg 138, standard shipboard procedures were modified to allow for the real-time monitoring of several laboratory core-scanning systems that provide centimeter-scale measurements of saturated bulk density, magnetic ...
Bloomer, Stephen F., Dadey, Kathleen A., Hagelberg, T. K., Lyle, Mitchell, Mayer, Larry A., Pisias, Nicklas G., Shipboard Scientific Party   +6 more
core   +4 more sources