Creep resistant ferritic steels based on Fe–2·25Cr–1Mo and Fe–(9–12)Cr have been used extensively in the energy and petrochemical industries for more than half a century. This is because they have an outstanding record of reliability in quite aggressive conditions over time periods as long as 30 years. The alloys have undergone progressive development throughout their history,1,2 particularly i...

The creep behavior of basalt fiber reinforced epoxy (BFRE) and glass fiber reinforced epoxy (GFRE) composites was studied through tensile testing at high temperature. To study the effect of reinforcing epoxy, the micro glass powder (MGP) was added at various volume percentage into the epoxy resin in BFRE composites. The initial strain for all the specimens were evaluated and compared with each ...

We study the damage enhanced creep rupture of disordered materials by means of a fiber bundle model. Broken fibers undergo a slow stress relaxation modeled by a Maxwell element whose stress exponent m can vary in a broad range. Under global load sharing we show that due to the strength disorder of fibers, the lifetime t(f) of the bundle has sample-to-sample fluctuations characterized by a log-n...

The present study provides a feasible method to evaluate creep properties for 9%Cr-Mo-Co-B power plant steel by comparing two sets of data obtained from small punch tests and conventional uniaxial tests. includes three steps: firstly, conduct series in different load temperature conditions; secondly, convert the central deflection test stress strain data; thirdly, determinate best fit correlati...

It is well known that the solution cooling rate has a great effect on the creep life of superalloys. In this research, three typical cooling rates were applied to generate different distributions of γ’ precipitates for creep tests. Ingots used to make specimens were manufactured by hot extrusion, and the master alloy had the composition of an FGH4096 power metallurgy superalloy. SEM and SESD we...

[1] Fault processes involve complex patterns of seismic events and aseismic slip. This work develops a three-dimensional (3-D) methodology for simulating long-term history of spontaneous seismic and aseismic slip on a vertical planar strike-slip fault subjected to slow tectonic loading. Our approach reproduces all stages of earthquake cycles, from accelerating slip before dynamic instability, t...

Networks of aggregated colloidal particles are solidlike and can sustain an applied shear stress while exhibiting little or no creep; however, ultimately they will catastrophically fail. We show that the time delay for this yielding decreases in two distinct exponential regimes with applied stress. This behavior is universal and found for a variety of colloidal gel systems. We present a bond-ru...

Abstract 9-12%Cr martensitic steels are promising materials for elements of boilers, tubes, pipes, heaters and steam blades fossil power plants, which able to operate at ultra-supercritical parameters steam. Creep tests were carried out two 12%Cr 9%Cr 650°C. After tempering 750-770°C, a tempered lath structure was revealed in all the studied. The 12%Cr-Ta steel had smallest width among studied ...

the creep behavior of basalt fiber reinforced epoxy (bfre) and glass fiber reinforced epoxy (gfre) composites was studied through tensile testing at high temperature. to study the effect of reinforcing epoxy, the micro glass powder (mgp) was added at various volume percentage into the epoxy resin in bfre composites. the initial strain for all the specimens were evaluated and compared with each ...