Results 71 to 80 of about 6,438 (224)

Hydrogen‐Enhanced Stress Corrosion Cracking of Wire Arc Additive Manufactured Inconel 625 Superalloy in NaCl Solution: Mechanism of Synergistic Degradation

Materials and Corrosion, EarlyView.
Hydrogen‐enhanced SCC of WAAM Inconel 625 in 3.5 wt.% NaCl solution. Hydrogen charging reduces passive film stability (lower corrosion potential) and promotes pitting at Laves phase/matrix interfaces. Stress corrosion cracks propagate along Laves‐rich regions, leading to quasi‐cleavage brittle fracture.
Xu Zhang, Jinhong Liu, Gongchen Zhu, Yajie Chu, Dong Wu, Liyi Wang   +5 more
wiley   +1 more source

Development of Calcium‐Based Coatings to Mitigate Vanadate Corrosion

Materials and Corrosion, EarlyView.
Ca‐rich coatings can suppress the corrosive attack of molten V2O5 by forming Ca2 V2 O7 and Ca V2 O6. For this, a large Ca‐reservoir is key to mitigate corrosion at 600°C and 700°C. ABSTRACT Vanadate corrosion occurs in devices powered by heavy fuel oil, such as stationary turbines.
Mark Alexander Ulherr, Emma Marie Hamilton White, Fabian Lanoy, Mario Rudolphi, Manja Krüger, Mathias Christian Galetz   +5 more
wiley   +1 more source

Researches on corrosion cracking phenomenonthat occurs on welded of agricultural equipment

Metalurgija, 2015
Welded construction equipments for agriculture are strongly stressed in terms of mechanics, but also in terms of environmental action and thus in many cases appears their wear by corrosion cracking phenomenon.
I. Sărăcin, G. Paraschiv, O. Pandia, I. Bozgă, D. Toma   +4 more
doaj  

New Insights About the Role of Sn‐Rich and Pb‐Rich Phases Over the Corrosion Mechanism of Low‐Tin Quaternary Bronze Alloys Under Sulfur‐Containing Conditions

Materials and Corrosion, EarlyView.
A mechanistic proposal for the initial steps of quaternary bronze corrosion in media containing sulfate was described. The process is driven by microgalvanic effects along the microstructure, generating anodic sites over lead and tin rich phases and cathodic sites onto Cu‐rich phases.
Augusto Versteg, Gustavo Prestes de Vargas, Tiago Falcade   +2 more
wiley   +1 more source

Influence of parameters of welding regime on metallographic structure of materialsfrom a joint welded in corner in „T” form

Metalurgija, 2015
To achieve metal constructions with high importance, it can be used different steels, but steel OL 52.4k has a very wide use due to technological properties and mechanical they present.
V. Petrescu, D. Dobrotă
doaj  

Overlap Percentage Effects on Microstructure and Microhardness in Wire Arc Additive Manufacturing of AISI 308L Stainless Steel

MetalMat, EarlyView.
Overlap percentage governs the remelting, dilution, and solidification behavior of CMT‐WAAM AISI 308L stainless steel. Increasing overlap to 50% promotes stronger bead‐to‐bead bonding, wider transition zones, and localized hardness enhancement, with the highest hardness observed in the overlap region due to grain refinement and δ‐ferrite redistribution.
Mojtaba Karamimoghadam, Mohammad Rezayat, Antonio Mateo, Nicola Contuzzi, Giuseppe Casalino   +4 more
wiley   +1 more source

Influence of use of ultrasound on metallographic structure of plated pieces by welding in ultrasonic field

Metalurgija, 2015
To optimize the plating process is necessary to know the behavior of surfaces plated during the exploitation and in particular susceptibility to cracking, the formation of cracks from the inside to outside or reverse, embrittlement in the heat affected ...
Gh. Amza, D. Dobrotă, V. Petrescu, Z. Apostolescu, R. G. Albulescu   +4 more
doaj  

MECHANICAL PROPERTIES LASER WELDING AUTOMOTIVE STEEL SHEETS

Acta Metallurgica Slovaca, 2015
The experimental and theoretical investigation deals with laser welding of automotive thin steel sheets. As tested materials were used Interstitial Free Steel (IF) from type of Hight Strength Low Alloy (HSLA) and the second is S420 steel (Micro-Alloyed ...
Anna Lišková, Mária Mihaliková, Lukáš Dragošek, Róbert Kočiško, Róbert Bidulský   +4 more
doaj   +1 more source

Knowledge‐Constrained Multi‐Objective Reinforcement Learning for Simultaneous Optimization of Printability and Mechanical Properties in Additively Manufactured Superalloys

Materials Genome Engineering Advances, EarlyView.
A knowledge‐constrained multi‐objective reinforcement learning (MORL) framework is proposed, embedding cracking susceptibility as a hard constraint to simultaneously optimize printability and mechanical properties of additively manufactured superalloys.
Pei Liu, Xueting Ren, Shibo Wei, Shuai Guan, Guohao Liu, Teng An, Haiyou Huang, Zhongnan Bi   +7 more
wiley   +1 more source

Hierarchically Rough rGO/HAp Nanocoatings on SLM Ti–6Al–4 V Implants for Enhanced Biointegration

Small, EarlyView.
This study investigates HAp/rGO bioactive coatings on Ti‐6Al‐4V fixation implants fabricated by selective laser melting with systematically varied volumetric energy density to tailor the as‐built surface state. Composite coatings were deposited by electrophoretic deposition and characterized using micro‐CT, profilometry, FESEM/EDS, and detailed XPS to ...
Muhammad Usama Zaheer, Vahid Jahed, Rajveer Singh Rajaura, Fatemeh Rastegar Adib, Muhammad Hassan Razzaq, Gökhan Demirel, Mobarak Abu Mraheil, Thaqif El Khassawna, Mehmet Fatih Aycan, Yogendra Kumar Mishra   +9 more
wiley   +1 more source