Results 141 to 150 of about 2,129 (183)

Hot Workability of the 2618 Aluminium Alloy

Materials Science Forum, 2000
The hot working behaviour of a 2618 aluminium alloy was investigated in torsion at temperatures ranging from 200 to 500°C. The peak flow stress was related to temperature and strain rate by means of the conventional constitutive equations normally used for high temperature deformation of metals.
Stefano Spigarelli, F. Bardi, E. Evangelista   +2 more
openaire   +1 more source

Hot workability testing of as-cast steels

Metals Technology, 1977
AbstractA casting procedure has been developed which enables structures typical of those found in commercial ingots to be obtained in large-size tensile specimens which can be broken out of the moulds either hot or cold before reheating to simulate hot or cold charging practice.
R. A. Harding, R. Sawle, C. M. Sellars
openaire   +1 more source

Evaluation of the Hot Workability of Commercially Pure Ti Using Hot Torsion Tests

Journal of Nanoscience and Nanotechnology, 2019
Optimum processing conditions were obtained by evaluating the hot working behavior of commercially pure Ti using hot torsion tests. Hot torsion tests were conducted at temperatures ranging from 800 °C-1000 °C and strain rates ranging from 0.1-10 s-1. The flow curves show that the peak stress increases as the temperature decreases and the strain rate ...
Myoung-Hun, Kim, Ji-Woon, Lee, Sang-Wook, Kim, Hyeon-Woo, Son, Ho-Joon, Choi, Young-Chul, Shin, Seong-Sik, Lim, Jae-Bum, Kim, Taek-Keun, Jung, Soong-Keun, Hyun   +9 more
openaire   +2 more sources

Enhancing constitutive description and workability characterization of Mg alloy during hot deformation using machine learning-based Arrhenius-type model

Journal of Magnesium and Alloys
Hot deformation is a commonly employed processing technique to enhance the ductility and workability of Mg alloy. However, the hot deformation of Mg alloy is highly sensitive to factors such as temperature, strain rate, and strain, leading to complex ...
Jinchuan Long, Lei Deng, Junsong Jin
exaly   +3 more sources

Hot Workability Testing Techniques

1971
Processes for the hot forming of metals are of great industrial importance because of the low flow stresses and high ductilities exhibited by most metals at homologous temperatures greater than one half. High rates of working which are desirable for reasons of economy have, however, the effect of increasing the flow stress and, in some circumstances ...
H. J. McQueen, J. J. Jonas
openaire   +1 more source

Hot workability of 00Cr13Ni5Mo2 supermartensitic stainless steel

Materials & Design, 2011
Abstract The hot workability of 00Cr13Ni5Mo2 supermartensitic stainless steel was investigated by hot compression and hot tension tests conducted over the temperature range of 950–1200 °C and strain rates varying between 0.1 and 50 s −1 . The processing map technique was applied on the basis of dynamic materials model and Prasad instability criterion.
Dening Zou, Ying Han, Dongna Yan, Duo Wang, Wei Zhang, Guangwei Fan   +5 more
openaire   +1 more source

Hot workability of alpha brasses

1963
Both lead and bismuth have a deleterious effect on the hot working properties of alpha brasses. The work reported in this article shows that the element uranium, when present in the alloy in such proportions as to form stable high melting point intermetallic compounds with all of the bismuth or lead, is a highly effective agent in removing the ...
R Thomson, J O Edwards
openaire   +1 more source

Hot workability of three grades of tool steel

Metallurgical Transactions A, 1984
Three tool steels, a cold-work air-hardening grade, a hot-work die grade, and a high-speed type, were deformed by torsion in the range of 900 to 1100 °C at rates of 0.1 to 5 s•1. In a series of continuous deformation tests the flow stress and ductility were determined.
C. Imbert, N. D. Ryan, H. J. McQueen
openaire   +1 more source

Hot workability of aluminum particulate composites

2013
Questo lavoro analizza sia le curve di flusso derivanti da prove di trazione a caldo [1-5] che la microstruttura [1,2,6-9] e le simulazioni del processo di estrusione (FEM) [10-13] di compositi in lega di alluminio. I risultati in analisi derivano principalmente da studi del Prof. H. McQueen.
LEO, PAOLA, Innovation E.n.g. D.e.p.t. University of Salento, 73100   +1 more
openaire   +2 more sources

Hot Workability of Mechanically Alloyed In-738

1977
The hot-workability of an oxide-dispersion-strengthened nickel base alloy IN-738 + Y2O3 was determined by high-strain-rate testing in the deformation range 10–4 to 102s-1 and at temperatures from 1050° to 1250°C. As-extruded IN-738 + Y2O3 shows high rupture ductilities at strain rates from 4∙10–2 to 4 s-1 and at temperatures from 1050°C to 1250°C.
Gernot H. Gessinger, Lars Hellner, Hans Johansson   +2 more
openaire   +1 more source