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...

Simpang Pesanggaran diatur menggunakan Alat Pemberi Isyarat Lampu Lalu Lintas (APILL) dan Area Traffic Control System (ATCS) yang berguna untuk mengatur pergerakan lalu lintas pada masing-masing lengan simpang. Penggunaan APILL ATCS belum efektif, dilihat dari tingginya tundaan panjangnya antrian. Tujuan penelitian adalah analisis kinerja tahun 2021, tanpa dengan adanya terbangun underpass 2024...

In the paper, a 2 µm high energy fs fiber laser and amplification system is presented based on Tm doped fibers. The seed laser was designed to generate pulse train at 2024 nm at a repetition rate of 2.5 MHz. An AOM was used as a pulse picker to further lower the repetition rate down to 100 kHz. Two-stage fiber pre-amplifiers and a high energy large mode area (LMA) fiber amplifier were used to b...