The continuous tube-rolling method has been widely used to manufacture high-quality seamless pipes and tubes. However, the analytical model for determining roll pitch diameter in three-roll retained mandrel rolling from first principles not yet presented, which has, thus, hindered development of control technology tube manufacturing. In this work, a new established force–equilibrium principles....

Abstract An investigation of the tensile mechanical properties electron beam welded OFE copper and high-purity niobium sheets is presented. Specimens were deformed in tension at strain rates ranging from 10 −3 to ~ 1600 s −1 . The 0.2% yield stress ultimate strength (UTS) specimens are similar those unwelded lower or equal 20 At higher rates, these for specimens. consistently than over range st...

background: the presence of heavy metals in the environment especially in water supplies have caused many concerns because of their toxicity and non-degradability. hexavalent chromium (cr) is one of the most toxic metals which is used in many industries, so it is essential to remove it from industrial wastewater. in this study, we made a comparison between different adsorption isotherms in the ...

This paper investigates axial compression process of multi-layered tubes with circular cross-section under the axial loading in the quasi-static condition using experimental method. Some specimens are prepared in seven different groups, namely; empty carbon/epoxy composite tubes, solid carbon/epoxy composite rods, empty copper tubes, composite tubes with silicon sealant filler, concentrically s...