A detailed and systematic investigation on the effect post heat treatment has microstructure evolution resultant mechanical properties of wire arc additive manufacturing processed Mg-5.9Gd-2.8Y-0.7Zr alloy is conducted in this work. The as-built sample composed mainly fine equiaxed α-Mg grain Mg24(Gd, Y)5 phase. solution (400°C × 1 h) relatively little size, but it can effectively reduce conten...

Successful joining of heat conducting materials, to high-temperature components is significant importance for management in nuclear power plants and liquid propellant launch vehicles. Solid-state processes are considered such dissimilar materials. Diffusion bonding a copper alloy (C18150) Ni-based superalloy (GH4169) was investigated this work. The trials at 900°C 60 min under constant 10 MPa p...

Reactive oxygen species (ROSs) are often associated with damage to cellular functions. ROSs production is indicatives of oxidative stress during physical exercise. Oxidative stress occurs in those circumstances in which free radicals determine a tissue damage or production of toxic and dangerous compounds for tissues. In a relaxation state, antioxidant defense of body may hold under control fre...

copper matrix composite reinforced by 1wt.% tib2 particles was prepared using in situ reaction of cu-1.4wt.% ti and cu-0.7wt.% b by rapid solidification and subsequent heat treatment for 1-20 hrs at 900ºc. high-resolution transmission electron microscopy (hrtem) characterization showed that primary tib2 particles were formed in liquid copper. heat treatment of as-solidified samples led to the f...

OBJECTIVE Chronic musculoskeletal pain is common in older adults but the nature of its relationship with ageing is unclear. The objective for this study was to test the hypothesis that the onset of widespread pain would be associated with a decrease in healthy ageing. METHODS Population-based prospective cohort study. A "healthy ageing" index was constructed across biomedical, physical, psych...

Angiotensin II (Ang II) plays important roles in ageing-related disorders through its type 1 receptor (AT1 R). However, the role and underlying mechanisms of AT1R in ageing-related vascular degeneration are not well understood. In this study, 40 ageing rats were randomly divided into two groups: ageing group which received no treatment (ageing control), and valsartan group which took valsartan ...