The influence of martensitic microstructure and prior austenite grain (PAG) size on the mechanical properties of novel maraging steel was studied. This was achieved by looking at two different martensitic structures with PAG sizes of approximately 40 µm and 80 µm, produced by hot rolling to different reductions. Two ageing heat-treatments were considered: both heat-treatments consisted of auste...

Over the years, aluminum content in a vehicle part is increasing due to the needs to reduce weight as well as increase fuel efficiency. Most of the cast product in a vehicle part is mostly cast from A356 alloy. It is used because A356 alloy posses’excellent characteristics over other type of alloy such as cast ability, high weight-to-strength ratio, good corrosion resistance and good weld-abili...

The synthetic hydroxyapatite is a very useful material for numerous applications in medicine as a biomaterial. One of the most economic manufacturing process is the precipitation route. In the present work, synthetic hydroxyapatite was prepared using the precipitation route, starting with aqueous solutions of calcium nitrate (Ca(NO3).4H2O ) and ammonium phosphate (H2(PO4)NH4). The effects of ph...

In order to reduce extra capital and energy cost caused by fouling and ageing, this paper presents a new methodology for synthesizing heat exchanger network (HEN) with the cleaning schedule optimized. Two cleaning methods with different cleaning efficiency are used to remove fouling and ageing, so the cleaning mode has to be selected along with an optimal cleaning schedule. The process is imple...

the phenomenon of " hormesis ". Exposure of organisms to mild stress fortifies them against subsequent, more severe insults. Yet, the relevant molecular mechanisms remain poorly understood. Although heat stroke is often fatal and survivors may suffer permanent neurologic damage, the mechanisms underlying heat stroke-induced cell and tissue injury remain elusive. To gain insight, we employed the...

Al–Zn–Mg–Cu alloys obtain their exceptional high strength predominately relying on precipitation. Deformation can influence the evolution of precipitation and may potentially provide additional through work hardening. In this study, coupling dislocation strengthening to achieve unique property combinations with strengths greater than those due heat treatment alone was investigated pre-aged AA70...

Abstract Liquid smoke food flavouring is an alternative to traditional smoking. Ageing treatment of liquid can remove tar improve a consistent sensory experience but traditionally takes months by storage. This study proposed thermal approach accelerate the ageing process. samples from kānuka and hickory woodchips were prepared fast pyrolysis. The obtained subjected storing them at ambient tempe...

Basalt fibre composite materials have shown good application prospects in electrical equipment, but their reliability can be affected by damp-heat ageing. In this work, the interface, mechanical, and properties of basalt composites treated with three coupling agents via ageing were compared. Molecular simulations conducted to reveal mechanism composites. The results show that γ-aminopropyl trie...

deep cryogenic heat treatment is assumed as a supplementary heat treatment performed on steels before the finaltempering treatment to enhance the wear resistance and hardness of the steels. in this study, the effects of thedeep cryogenic heat treatment on the wear behavior and corrosion resistance of the 1.2080 tool steel were studiedusing the wear testing machine and polarization and impedance...

Abstract In the present work, a novel low-temperature heat-treatable recycled die-cast Al–Mg alloy was developed by adding Zn into non-heat-treatable Al–5Mg–1.5Fe–0.5Mn alloy. The results showed that additions resulted in formation of equilibrium phase T-Mg 32 (Al, Zn) 49 under as-cast condition, which can be dissolved ?-Al matrix at relatively low solution temperature (430 °C) and thus set bas...