Thin fi lms with microcrystalline and nanocrystalline grains are used in MEMS and thin fi lms for electronics. These systems have mechanical properties that depend on the microstructure. Grain size is frequently reported only as mean values or bounds. It has been demonstrated, however, that a mean grain size value is insuffi cient to describe the microstructure of these materials and the result...

Creep strength enhanced ferritic (CSEF) steels which contain 9 to 12%Cr have become the steels of choice in many industrial high energy systems. The typical compositions of alloy types P91, P92 and E911 are compared with 12CrMoV in Table 1. These steels are selected for use in applications where high temperature creep can occur because of a favorable balance between cost and properties [1,2]. T...

To explain Venus' young surface age and lack of plate tectonics, tectonic regime has often been proposed to be either an episodic-lid with global lithospheric overturns, or equilibrium resurfacing numerous volcanic activities. Here, we use 2-D thermochemical convection models realistic parameters, including rheology (dislocation creep, diffusion plastic yielding), experiment-based plagioclase (...

the creep/recovery behavior of wood flour-polypropylene was compared with medium density fiberboard (mdf) and particleboard. for this purpose, wood flour-polypropylene composites (with and without compatibilizer)were manufactured by using a laboratory twin-screw extruder. the mdf and particleboard panels were obtained from local producers. short term flexural creep tests at 30% of ultimate bend...

the effect of impact modifier on creep behavior of wood flour- recycled polypropylene composites has been evaluated in this work. for this purpose, impact modifier (ethylene vinyl acetate) and recycled polypropylene were mixed with wood flour (50/50% w/w) as well as the impact modifier (0, 3%, 6% and 9%) by a counter-rotating twin-screw extruder to manufacture the wood flour- recycled polypropy...

Creep aging behavior of a pre-strain and under-age treated 7B04 aluminum alloy (7B04-P for short) was systematically investigated under different temperatures applied stresses. A lot dislocation tangles η’/GPzs were formed in the Al matrix 7B04-P al alloy. With increase temperature stress, total creep strain steady-state rate increased significantly. However, mechanical properties creep-aged ar...

This short article comments on the interactions between incoherent hard particles and dislocations, in dispersion-strengthened alloys, at elevated temperatures, which is basis for their strength high temperatures. We briefly review details of detachment model, discuss limitations models propose a new model detachment. The purpose this communication to finally offer creep research community deta...