The key in selective laser sintering (SLS) of polyamide 12 for exceeding the cusp from a prototyping to a serial production technique poses the long-term behavior of such components. The improvement of additive manufacturing technologies is attended by the enlargement of the possible ranges of use. The crucial obstacle for their actual use is the ignorance of the long-term properties and the co...

(1) Background: the aim of this study was to investigate transmittance levels aligners in relation different thermoforming disks and printers after 14 days vitro aging. (2) Methods: level 18 investigated. Three were used create aligner: Carbon L1, Prodways LD20 RapidShape D100+. Each printer produced 6 aligners: three made Zendura FLX material Scheu Ca Pro+. sample subjected spectrophotometry a...

The effect of the milling time & ageing on the hardness, density, and wear characteristics of Al 7150 alloy specimens made via powder metallurgy has been studied. The different constituents of Al 7150 alloy were processed in a planetary ball milling set up with a BPR of 10:1 for 5 hours, 10 hours, and 20 hours. At 400 °C, the milled powders were subsequently hot compacted in a punch die setup. ...

The effect of accelerated aging (AA) was studied in Basil (Ociumum basilicm L.) seeds. The objective of this research was to evaluate Effect of seed ageing on germination of Basil Seeds in Roodan University in year 2012. experiment was CRD design with 3 replicate. The seeds were artificially aged at 45°C and 100% relative humidity for 24, 48, 72, and 96 hours. Results indicated germination perc...

On the model of premature aging induced by 30-day dark deprivation (light-dark cycle 24/0 h, artificial illumination 300 Lux), effect exogenous melatonin (0.3 mg/kg, 14 days after cancellation deprivation, intragastric dailyin 2 % starch mucus) on dynamics body weight and level Klotho protein in blood was studied outbred white male rats 4 months age. It has been shown that prolonged is accompan...

This paper presents the results of studies on true fracture stresses Al alloy 6101 with an ultrafine-grained (UFG) structure processed by equal channel angular pressing — conform (ECAP-C) method and same after artificial aging (AA state). The grain size in UFG state was about 500 nm. Aging particles Al3Fe were present AA state. Strength yield stress increase as a result formation structure. str...

Background: Discoloration of composite restorations may affecting aesthetic appearance. The aging-process and surface roughness influence color changes. A nanofilled self-adhesive protecting coating has been developed for tooth restoration expected to prolong the longevity restoration. To evaluate effect protective on color-changes flowable packable after aging condition. 
 Methods: total ...

In this study, the effect of artificial aging parameters, applied to AA6013 aluminum alloys commonly used in automotive and aerospace sectors, on wear resistance was examined. For purpose, alloy samples were solutionized at 575 °C for 60 minutes then they artificially aged 2, 4, 6 hours 180 200 temperatures. Mean hardness measured as 66.6 HV taken. It determined that a result aging, α-AlFeMnSi ...