Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Andrei C, Popescu"'
Publikováno v:
Results in Engineering, Vol 24, Iss , Pp 103350- (2024)
In this study, IN718 alloys with TiC particulate content between wt.% 0÷15 were fabricated by Laser Melting Deposition (LMD). Increasing the ceramic reinforcement content in the metal matrix composites (MMC), the Laves phase decreased, while the har
Externí odkaz:
https://doaj.org/article/e405607a2407472ab638efa331611697
Autor:
Muhammad Arif Mahmood, Asif Ur Rehman, Marwan Khraisheh, Metin U. Salamci, Rashid Ur Rehman, Uzair Sajjad, Carmen Ristoscu, Andrei C. Popescu, Mihai Oane, Ion N. Mihailescu
Publikováno v:
Crystals, Vol 14, Iss 9, p 763 (2024)
Additive manufacturing (AM) has profoundly impacted modern engineering and materials science by enabling unparalleled control over microstructures, customization, and material properties [...]
Externí odkaz:
https://doaj.org/article/0a28c9b154c844a1ae22552496471fab
Publikováno v:
IEEE Access, Vol 11, Pp 23909-23925 (2023)
We demonstrate the adaption of three established methods to the field of surrogate machine learning model development. These methods are data augmentation, custom loss functions and fine-tuning of pre-trained models. Each of these methods have seen w
Externí odkaz:
https://doaj.org/article/3415918ca1154db691af06553f76061b
Autor:
Muhammad Arif Mahmood, Andrei C. Popescu, Mihai Oane, Asma Channa, Sabin Mihai, Carmen Ristoscu, Ion N. Mihailescu
Publikováno v:
Results in Physics, Vol 26, Iss , Pp 104440- (2021)
Recent scientific and technological developments demonstrated that laser melting deposition (LMD) could yield near-net-shape parts by additive manufacturing. Under context, it was noticed that the primary operating parameters (i.e., laser power, scan
Externí odkaz:
https://doaj.org/article/af222afb721041fab8559be129f665ad
Autor:
Cristian N. Mihailescu, Mihai Oane, Bogdan A. Sava, Andrei C. Popescu, Mihail Elisa, Muhammad Arif Mahmood, Natalia Mihailescu, Ana V. Filip, Sinziana Andreea Anghel, Ion N. Mihailescu, Carmen Ristoscu
Publikováno v:
Crystals, Vol 12, Iss 8, p 1155 (2022)
A semi-analytical-numerical solution is theorized to describe the laser additive manufacturing via laser-bulk ceramic interaction modeling. The Fourier heat equation was used to infer the thermal distribution within the ceramic sample. Appropriate bo
Externí odkaz:
https://doaj.org/article/be6347cc0e8e4fc0a27263e4e8b22466
Autor:
Muhammad Arif Mahmood, Andrei C. Popescu, Mihai Oane, Diana Chioibasu, Gianina Popescu-Pelin, Carmen Ristoscu, Ion N. Mihailescu
Publikováno v:
Results in Physics, Vol 22, Iss , Pp 103880- (2021)
Many of the significant mechanical properties of stainless steel, including ultimate tensile strength, yield strength and hardness, the ductile–brittle transition temperature, and susceptibility to environmental embrittlement, can be improved by gr
Externí odkaz:
https://doaj.org/article/71c16787b9954d44867f8755d2b6925e
Publikováno v:
Metals, Vol 12, Iss 1, p 77 (2022)
Additive manufacturing (AM) processes can produce three-dimensional (3D) near-net-shape parts based on computer-aided design (CAD) models. Compared to traditional manufacturing processes, AM processes can generate parts with intricate geometries, ope
Externí odkaz:
https://doaj.org/article/5f32f068be924c3eb2f077875a2d0596
Autor:
Asif Ur Rehman, Muhammad Arif Mahmood, Peyman Ansari, Fatih Pitir, Metin Uymaz Salamci, Andrei C. Popescu, Ion N. Mihailescu
Publikováno v:
Metals, Vol 11, Iss 12, p 2023 (2021)
Powder spattering and splashing in the melt pool are common phenomena during Laser-based Powder Bed Fusion (LPBF) of metallic materials having high fluidity. For this purpose, analytical and computational fluid dynamics (CFD) models have been deduced
Externí odkaz:
https://doaj.org/article/3cf4b5945a074d48a7926a50cde1eebb
Autor:
Asif Ur Rehman, Muhammad Arif Mahmood, Fatih Pitir, Metin Uymaz Salamci, Andrei C. Popescu, Ion N. Mihailescu
Publikováno v:
Nanomaterials, Vol 11, Iss 12, p 3284 (2021)
In the laser powder bed fusion (LPBF) process, the operating conditions are essential in determining laser-induced keyhole regimes based on the thermal distribution. These regimes, classified into shallow and deep keyholes, control the probability an
Externí odkaz:
https://doaj.org/article/344be33337db4a70bb3a8bfbcaadd55e
Autor:
Sabin Mihai, Diana Chioibasu, Muhammad Arif Mahmood, Liviu Duta, Marc Leparoux, Andrei C. Popescu
Publikováno v:
Metals, Vol 11, Iss 11, p 1877 (2021)
In this study a continuous wave Ytterbium-doped Yttrium Aluminum Garnet (Yb: YAG) disk laser has been used for welding of AlMg3 casted alloy. A high-speed imaging camera has been employed to record hot vapor plume features during the process. The pur
Externí odkaz:
https://doaj.org/article/a3c6c99d8fa44ab2965d704119b71139