Results 101 to 110 of about 3,298,007 (203)

Hardness-tensile property relationships for HAZ in 6061-T651 aluminum

, 2014
High-strength aluminum is used extensively in industry, with welding being a widely used fabrication method. This work focuses on welding of 6061-T651 aluminum and establishment of the hardness-tensile properties relationship in the heat-affected zone ...
John Norrish (19582213), M I Ripley (20194359), Alan Hellier (19586359), P A Stathers (20194356), R P Harrison (13654975)   +4 more
core  

Almost Polynomial Hardness of Node-Disjoint Paths in Grids

, 2018
We study the hardness of the Node-Disjoint Paths (NDP) problem. In this problem, we are given a graph and a collection of source-sink pairs of vertices, called demand pairs. The goal is to route as many of the demand pairs as possible, along paths which
Nimavat, Rachit
core   +1 more source

Indentation Velocity Effect on Martens Hardness Measurement

, 2002
The indentation velocity effect on Martens Hardness (HM) was investigated in the macro-, micro- and nano ranges of the indentation test. The indentation test in the micro- and nanorange was analyzed for practical indentation velocities ranging between 2 ...
GERMAK, ALESSANDRO FRANCO LIDIA, HERMANN K, MENELAO F, Herrmann K., Barbato G., BRONDINO G., BARBATO G, Menelao F.   +7 more
core  

Non-Destructive Testing of Long-Term Exploited Steel Pipes Based on Statistical Hardness Parameters

Eng
The features of non-destructive testing of steel pipes with a long service life in terms of dynamic hardness parameters are considered. Regarding the limited applicability of normal and lognormal distributions, the Weibull and Gumbel distributions are ...
Sergey Osipov, Nikolai Goncharov, Oleg Brusnik   +2 more
doaj   +1 more source

Cutting control of boom-type roadheader considering coal rock hardness

Gong-kuang zidonghua
The coal rock hardness significantly affects the spatial operation status of boom-type roadheader. Analyzing the correlation between the spatial operation status of roadheader and changes in coal rock hardness can help better achieve automatic cutting ...
XU Xiangqian, JIAN Kuo, WANG Ning, LI Shengli   +3 more
doaj   +1 more source

Dynamic hardness of high-strength steel and titanium alloy

, 2000
Essential results of experimental studies on dynamic hardness (an average pressure on the cone face of a rigid rod at its impact indentation into the surface layer of a thick plate) of a homogeneous rolled steel (HRA) and a titanium alloy are presented ...
G. Stepanov, V. Zubov
core   +1 more source

Effect of Deformation Degree on Microstructure and Properties of Ni-Based Alloy Forgings

Metals
The primary objective of this paper is to investigate the influence of deformation degree on the microstructure and properties of a Ni-based superalloy.
Ruifeng Dong, Jian Li, Zishuai Chen, Wei Zhang, Xing Zhou   +4 more
doaj   +1 more source

Folder 6: Model engine data sheets and operating instructions, J - N, ca. 1960, 1972, 1988

, 1960
Instructions, illustrations, and parts price list for a Dynamic Models, INC. Johnson Engines.
Dynamic Models, Inc.
core  

Oscillations of First Order Delay Dynamic Equations

, 2006
Stavroulakis, Ioannis/0000-0002-4810-0540Consider the first order linear delay dynamic equation of the forms x(Delta)(t) + p(t)x(tau(t)) = 0. (E) New oscillation criteria are established which contain well-known criteria for delay differential and ...
Sahiner, Y., Stavroulakis, I. P.
core   +1 more source

Experience in the metrological characterization of primary hardness standard machines

, 2007
The Istituto Nazionale di Ricerca Metrologica (INRIM) and Galileo section of LTF S.p.a. have cooperated for many years in the field of hardness for developing and improving Primary Hardness Standards and measuring systems for their laboratories.
LIGUORI A, ORIGLIA C., GERMAK, ALESSANDRO FRANCO LIDIA   +2 more
core   +1 more source