نتایج جستجو برای: term creep

تعداد نتایج: 590914  

Journal: :international journal of iron & steel society of iran 2012
e. karamian s. abdollah a. bataille

spark plasma sintering (sps) method, as plasma activated sintering, is a method applicable for rapid sintering of metals and ceramics. owing to the advantage of rapid heating, the alumina ceramics obtained by sps have a grain size and density comparable to those of hot pressed ones. the increase of densification rate may be related to some difference in ion transport characteristics. this study...

Journal: :علوم و تکنولوژی پلیمر 0
سعید کاظمی نجفی مرتضی مصطفی زاده مجید چهارمحالی مهدی تجویدی

the influence of flour content and immersion time in water on the creep behavior of composites made from high density polyethylene (hdpe) waste and mdf (medium density fiberboard) flour was investigated. mixing was carried out by a twin screw extruder and the sample was manufactured by flat hot press. firstly, the modulus of elasticity and bending strength of various mdf flour-polyethylene comp...

2015
K. Kong E. Ferrier

The purpose of this research was to investigate the creep behaviour of the heterogeneous Timber-UHPFRC beams. New developments have been done to further improve the structural performance, such as strengthening of the timber (glulam) beam by bonding composite material combine with an ultra-high performance fibre reinforced concrete (UHPFRC) internally reinforced with or without carbon fibre rei...

2009
Calvin M. Stewart Erik A. Hogan Ali P. Gordon

Directionally solidified (DS) Ni-base superalloys have become a commonly used material in gas turbine components. Controlled solidification during the material manufacturing process leads to a special alignment of the grain boundaries within the material. This alignment results in different material properties dependent on the orientation of the material. When used in gas turbine applications t...

2007
C. J. Boehlert

Tensile–creep experiments were conducted in the temperature range 100–200 C and stress range 20–83 MPa for a series of magnesium–zinc–yttrium (Mg-Zn-Y) and mangnesium-zinc–zirconium (Mg-ZnZr) alloys ranging from 0 to 5.4 wt% Zn, 0 to 3 wt% Y, and 0 to 0.6 wt.% Zr. The greatest tensile– creep resistance was exhibited by an Mg–4.1Zn–0.2Y alloy. The room-temperature yield strength increased with i...

Journal: :مهندسی متالورژی و مواد 0
مهدی یدالهی بهرام نامی امیر عابدی

in this article, the effects of adding zn and conducting age hardening treatment on impression creep properties of mg-5%sn alloy have been investigated. the creep tests were carried out using impression creep method in which a cylindrical punch was used to apply the stress in range of 450 mpa < σimp < 270 mpa and at the test temperatures of 150, 175 and 200 °c. the results showed that age harde...

2000
C. Schuh A. Wanner

In two-phase TiAl-based alloys, the coexisting 2 and phases exhibit a thermal expansion mismatch, so that increased creep rates during thermal cycling may be expected. Creep deformation of two g-TiAl-based alloys was investigated during thermal cycles between 900 and 300 or 350 C with applied tensile stresses of 32.5 or 37.0 MPa. Measured thermal cycling creep rates were compared with isotherma...

Journal: :Biomechanics and modeling in mechanobiology 2015
A K Kureshi A Afoke S Wohlert S Barker R A Brown

Native collagen gels are important biomimetic cell support scaffolds, and a plastic compression process can now be used to rapidly remove fluid to any required collagen density, producing strong 3D tissue-like models. This study aimed to measure the mechanical creep properties of such scaffolds and to quantify any enhanced creep occurring in the presence of cells (cell-mediated creep). The test...

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