Effect of magnesium content on the stress exponent and internal stress in the steady state creep of Al-Mg alloys

1985 ◽  
Vol 19 (3) ◽  
pp. 279-284 ◽  
Author(s):  
Derek O. Northwood ◽  
I.O. Smith
Keyword(s):  
Steady State ◽  
Internal Stress ◽  
Stress Exponent ◽  
Magnesium Content ◽  
Steady State Creep ◽  
Mg Alloys ◽  
Al Mg Alloys

The stress exponent of steady-state creep in Al-Mg alloys

1984 ◽  
Vol 2 (4) ◽  
pp. 339-343 ◽  
Author(s):  
D.O. Northwood ◽  
I.O. Smith
Keyword(s):  
Steady State ◽  
Stress Exponent ◽  
Steady State Creep ◽  
Mg Alloys ◽  
Al Mg Alloys

Microstructures developed during steady-state creep of Al-Mg alloys

Metallography ◽  
1986 ◽  
Vol 19 (3) ◽  
pp. 285-304 ◽  
Author(s):  
Meng Xian Ying ◽  
Derek O Northwood ◽  
Ian O Smith
Keyword(s):  
Steady State ◽  
Steady State Creep ◽  
Mg Alloys ◽  
Al Mg Alloys

On Creep Rupture Characteristics in STS304 Stainless Steels

2006 ◽  
Vol 326-328 ◽  
pp. 1309-1312
Author(s):  
Seon Jin Kim ◽  
Yu Sik Kong ◽  
Young Join Noh ◽  
Won Taek Jung ◽  
Sang Woo Kwon
Keyword(s):  
Steady State ◽  
Creep Rate ◽  
Stress Exponent ◽  
Stainless Steels ◽  
Elevated Temperatures ◽  
Creep Rupture ◽  
Steady State Creep ◽  
Rupture Time ◽  
Steady State Creep Rate ◽  
Creep Stress

In this study, the creep rupture tests of STS304 stainless steels were investigated at three different elevated temperatures of 600, 650 and 700 under the constant creep stresses. Creep rupture characteristics such as creep stress, creep rupture time, steady state creep rate and so on were evaluated. The behaviors of creep rate curve and initial strain are compared at three different elevated temperatures. The stress exponent (n) at 600, 650 and 700 based on steady state creep rate showed 22.5, 20.6 and 11.4 respectively. By increasing the temperature, the stress exponent is decreased. At the temperature of 700, the lowest stress exponents are shown and this behavior is also observed in the case of stress exponent based on rupture time. The creep life prediction by LMP method is presented and the equation of this result is as follows: T(logtr+20)=-0.005152-14.56+24126.

Effect of magnesium content on thermal and structural parameters of Al–Mg alloys directionally solidified

2010 ◽  
Vol 45 (9) ◽  
pp. 2285-2295 ◽  
Author(s):  
Jean Robert Pereira Rodrigues ◽  
Mirian de Lourdes Noronha Motta Melo ◽  
Rezende Gomes dos Santos
Keyword(s):  
Structural Parameters ◽  
Magnesium Content ◽  
Mg Alloys ◽  
Directionally Solidified ◽  
Al Mg Alloys

Creep Behavior of Hot Extruded Al-5% SiC Composite Powder

2007 ◽  
Vol 534-536 ◽  
pp. 861-864
Author(s):  
A. Hosseini Monnazah ◽  
Abdolreza Simchi ◽  
S.M. Seyed Reihani
Keyword(s):  
Steady State ◽  
Stress Exponent ◽  
Creep Test ◽  
Creep Behavior ◽  
Mechanical Milling ◽  
Threshold Stress ◽  
Composite Powder ◽  
Constant Load ◽  
Steady State Creep ◽  
Energy Term

The creep behavior of particulate Al-5vol.% SiC composite was investigated. The composite powder was produced by mechanical milling and hot extruded at 450°C at the ratio of 16:1. A creep test was carried out at a constant load at 598, 648, and 673 K. Using the existing equations proposed for the steady-state creep of metals, the threshold stress and the stress exponent of the creep as a function of temperature were determined. The stress exponent was found to be 3 at the temperature of 673 K and 8 at the lower temperatures, i.e. 598 and 648 K. The dependency of the threshold stress to temperature obeys the Arrhenius relationship with the energy term of 29 kJ mole-1.

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