scholarly journals The Effect of Surface Defects on Mechanical Properties of Powder Forged Material.

1994 ◽  
Vol 41 (3) ◽  
pp. 285-288
Author(s):  
Kazuhiko Takahashi ◽  
Eisuke Hoshina
Keyword(s):  
Mechanical Properties ◽  
Surface Defects ◽  
Effect Of Surface

Effect of the Surface Defects on Hydroformability of Aluminum Alloys

2007 ◽  
Vol 340-341 ◽  
pp. 587-592 ◽  
Author(s):  
B.J. Kim ◽  
K.H. Choi ◽  
K.S. Park ◽  
Chester J. van Tyne ◽  
Young Hoon Moon
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
Weld Seam ◽  
Surface Defects ◽  
Orange Peel ◽  
Forming Limit ◽  
Die Surface ◽  
Hydroforming Process ◽  
Effect Of Surface

Extruded aluminum alloys, which are highly versatile, have relatively modest prototyping cost, good strength and corrosion resistance. Because there is no weld seam, the circumferential mechanical properties may be uniform and advantageous for hydroforming. However, surface defects such as die lines and pick-up can be generated during the extrusion especially due to imperfections on the die surface. In this study, the extent of the crack propagation caused by die lines is evaluated according to the deformed shape of the tube in hydroforming process. And when forming a extruded aluminum tube, the deformed surface of the tube frequently becomes rougher with increasing plastic strain. This is well known as orange peel phenomenon and it has a significantly effect not only on the surface quality of a final product but also on the forming limit. To evaluate the effects of the orange peel on the hydroformability, the inter-stage polishing has been performed. Through the several tests including hydroforming test, the effect of surface defects on the hydroformabilities are well defined.

Physico-Mechanical Properties of Hardened Mg-Phosphate Cement

1989 ◽  
Vol 179 ◽  
Author(s):  
Marek Petri ◽  
Ivan Odler
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Poisson’S Ratio ◽  
Bending Strength ◽  
Surface Defects ◽  
Poisson's Ratio ◽  
Magnesium Phosphate ◽  
Original Moisture ◽  
Moisture State ◽  
Effect Of Surface

AbstractIn a series of test specimens made out of magnesium phosphate cement, their physico-mechanical properties–i.e., fracture toughness, Poisson's ratio, Young's modulus, and bending strength–were studied. Samples included in the study were either in their original moisture state or dried. Some of them were polished on their tension side to eliminate the effect of surface defects.

Effect of Surface Penetrating Sealer on the Microstructure Properties of Cement-Based Composites

2013 ◽  
Vol 651 ◽  
pp. 245-250
Author(s):  
Tasi Lung Weng ◽  
Wei Ting Lin
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Concrete Durability ◽  
Test Results ◽  
Chloride Permeability ◽  
Durability Test ◽  
Chloride Resistance ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Effect Of Surface

The effect of penetrating sealer on the structure of surface pore, mechanical properties, and durability of cement-based composites was studied. Concrete specimens with various water/cement ratios (w/c=0.35, 0.45, 0.55) were cast and treated surfaced with various amounts of penetrating sealer at different ages. The effect of penetrating sealer on the mechanical properties of concrete was assessed by compressive strength. And, the rapid chloride permeability was also explored to test concrete durability. Test results indicate that the application of penetrating sealer significantly improves concrete compressive strength and chloride resistance. By using scanning electron microscopes observation, the penetrating depth of penetrating sealer can be determined and is about 2 cm. The penetrating sealer in this study may be categorized as deep penetrating sealer.

Atomic-scale investigation of the effect of surface carbon coatings on the oxidation and mechanical properties of iron nanowires

2021 ◽  
Author(s):  
Gurcan Aral ◽  
Md Mahbubul Islam
Keyword(s):  
Mechanical Properties ◽  
Oxidation Process ◽  
Atomic Scale ◽  
Carbon Coatings ◽  
Surface Carbon ◽  
Iron Nanowires ◽  
Effect Of Surface

The understanding of the complex atomistic-scale mechanisms of the oxidation process of carbon (C) coated iron nanowires (Fe NW) and also the resulting modulation of mechanical properties is a highly challenging task.

scholarly journals Effects of surface defects on the mechanical properties of ZnO nanowires

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Aditi Roy ◽  
James Mead ◽  
Shiliang Wang ◽  
Han Huang
Keyword(s):  
Mechanical Properties ◽  
Surface Defects ◽  
Zno Nanowires

Effect of surface defects on the fatigue behavior of a cast TiAl alloy.

2000 ◽  
Vol 646 ◽  
Author(s):  
M. Nazmy ◽  
M. Staubli ◽  
G. Onofrio ◽  
V. Lupinc
Keyword(s):  
Tial Alloy ◽  
High Cycle Fatigue ◽  
Surface Defects ◽  
Fatigue Behavior ◽  
Impact Resistance ◽  
Economic Life ◽  
Crack Advance ◽  
Crack Growth Behavior ◽  
Engine Components ◽  
Effect Of Surface

ABSTRACTThe effect of surface defects on the performance of TiAl-base alloys is an issue of importance in contemplating their application into engine components. Due to the relatively low ductility and low impact resistance of gamma alloys the validation of models for estimating economic life and for safe-life approaches employed for components becomes of great importance. Surface defects can be attributed to various sources during the manufacturing or handling of the components. In fact, little is known about the detrimental effects of surface defects on gamma alloys. In the present study, the effect of artificially introduced surface defects, on the high cycle fatigue behavior of the Ti-47Al-2W-0.5Si, will be investigated and correlated with the crack growth behavior at 700°C. The results are reported in the form of the Kitagawa diagram in which the safe and unsafe zones for crack advance and fracture are defined.

Sign in / Sign up

Export Citation Format

Share Document