Electric Discharge Drill Machine (EDDM) is a spark erosion process to produce micro holes in conductive materials. This process is widely used in aerospace, medical, dental and automobile industries. As for the performance evaluation of the Electric discharge drilling machine it is very necessary to study the process parameters of machine tool. In this research paper a brass rod 2 mm diameter w...

Corresponding author: Jun-Ro Yoon, M.D., Ph.D., Department of Anesthesiology and Pain Medicine, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 327, Sosa-ro, Wonmi-gu, Bucheon 420-717, Korea. Tel: 82-32-340-7075, Fax: 82-32-340-2255, E-mail: [email protected] This is an open-access article distributed under the terms of the Creative Commons Attribution Non...

The corrosion evolution of 2024-T351 and 7075-T651 aluminum alloys in the thin electrolyte layer (TEL) wet–dry alternating cycle (WDAC) environment is studied this work. results show that TEL environment, competitive effect between H+ accelerates reactions deposition sulfate impedes attacks exists during exposure. difference with increasing HSO3−, subsurface intergranular on promoted to form ex...

Fully reversed stress-controlled tension–compression fatigue experiments (R = −1) were conducted to study the cyclic deformation and behavior of 7075-T651 aluminum alloys with without a surface mechanical rolling treatment (SMRT). The strain amplitude, ratcheting effect, asymmetric base metal (BM) SMRT specimens analyzed. showed more remarkable effects asymmetry under high stresses. Fatigue tes...

Age-hardenable aluminum alloys used in aerospace structures are susceptible to environment assisted fatigue crack propagation (EFCP), limiting component durability and safety. The objective is to quantitatively understand EFCP and its inhibition for important aerospace alloys: 7075-T651 (Al-Zn-Cu-Mg), C433-T3 (Al-Cu-Mg), and C47A-T86 (AlCu-Li). EFCP is understood through the hydrogen embrittlem...

The viscoelastic response of pure Al and 7075 (AlZnMg) and 2024 (AlCuMg) alloys, obtained with a dynamic-mechanical analyzer (DMA), is studied. The purpose is to identify relationships between the viscoelasticity and fatigue response of these materials, of great interest for structural applications, in view of their mutual dependence on intrinsic microstructural effects associated with internal...