Article
Materials Science, Multidisciplinary
Lukas Stemper, Matheus A. Tunes, Phillip Dumitraschkewitz, Francisca Mendez-Martin, Ramona Tosone, Daniel Marchand, William A. Curtin, Peter J. Uggowitzer, Stefan Pogatscher
Summary: This study presents a thermomechanical processing concept that utilizes the full industrial application potential of AlMgZn(Cu) alloys. The beneficial linkage of alloy design and processing achieves a balance between high mechanical strength and good formability while addressing the need for economically feasible processing times. The alloys investigated show high formability and a rapid hardening response, with significant enhancement by the addition of Cu, after short pre-aging treatments and final heat treatments.
Article
Materials Science, Multidisciplinary
Steffen Lotz, Emad Scharifi, Ursula Weidig, Kurt Steinhoff
Summary: The increasing demand for hot stamped aluminum components in automotive and aerospace industries has led to the need for efficient and resource-conserving thermo-mechanical processes. This study focuses on the combined effect of forming and aging processes on the mechanical properties of high-strength aluminum alloys AA6082 and AA7075. Two different thermo-mechanical aging process strategies are proposed, resulting in significant reduction in process time from 24 h to 5 h while maintaining similar mechanical properties as the conventional T6 peak aged condition.
Article
Nanoscience & Nanotechnology
Soung Yeoul Ahn, Jongun Moon, Yeon Taek Choi, Eun Seong Kim, Sang Guk Jeong, Jeong Min Park, Mungu Kang, Hyomoon Joo, Hyoung Seop Kim
Summary: The microstructure and mechanical properties of AlSi10Mg alloy fabricated by selective laser melting were investigated in this study. Substantial hardening was achieved by aging heat treatment. The alloy shows excellent combination of strength and ductility, attributed to its fine cellular structure and nanoscale needle-like precipitates.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zhi-Jun Zhao, Xin-Fu Gu, Meng Li, Ming-Le You, Mohan Chen, Fu-Zhi Dai, Zhang-Zhi Shi
Summary: A nano-precipitate of Si-Mg2Si core-shell structure is discovered in Al alloys for the first time. The orientation relationship between the ss-Mg2Si shell and the Si core is predicted by a near row matching model based on interfacial good matching. First-principles calculation reveals that heterogeneous nucleation of Mg2Si on Si is favored due to reduction of nucleation barrier.
Article
Nanoscience & Nanotechnology
C. Ren, K. Sun, Y. F. Jia, N. Z. Zhang, Y. D. Jia, G. Wang
Summary: The study examined the microstructural evolution and mechanical properties of (FeNi)67Cr15Mn10-xAl4Ti4Mox high entropy alloys. It was found that the substitution of Mn by Mo introduced hard a precipitates into the matrix and significantly refined the grains, leading to the increase in yield strength. However, the formation of the hard a precipitates hindered the work hardening process and decreased the plasticity, resulting in a decrease in elongation at break. The highest ultimate tensile stress was obtained at x = 4, where the fracture morphology changed from a coarse grain morphology to a typical brittle fracture. Therefore, (FeNi)67Cr15Mn6Al4Ti4Mo4 showed the optimal mechanical properties overall.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ang Xiao, Yuhong Lin, Changqing Huang, Xiaohui Cui, Ziqin Yan, Zhihao Du
Summary: The 2024 aluminum alloys are widely used in various industrial applications, and improving their formability and serviceability is crucial in the manufacturing process. The combination of electromagnetic forming (EMF) and heat treatment has been found to effectively enhance the formability of these alloys. This study investigated the effects of different heat treatment regimens on the properties and microstructure of 2024 aluminum alloy. Through various tests and characterization techniques, it was found that the combination of EMF and heat treatment processes can significantly improve the strength, elongation, and corrosion resistance of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Abbas Mohammadi, Nariman A. Enikeev, Maxim Yu Murashkin, Makoto Arita, Kaveh Edalati
Summary: The study achieved nanograin sizes in an Al-La-Ce alloy through ultra-SPD followed by aging, and identified two breaks in the Hall-Petch relationship. Detailed analysis confirmed that nanograin formation alone is not sufficient for extra hardening, and additional strategies such as grain-boundary segregation and precipitation are necessary to address the issue of softening.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Alexander Heiss, Venkat Sai Thatikonda, Andreas Richter, Lisa-Yvonn Schmitt, Daesung Park, Ulrich E. E. Klotz
Summary: The use of biodegradable materials for implants is an effective solution to long-term complications associated with permanent implants. Zn-based alloys have gained attention due to their biocompatibility, corrosion resistance, and adequate mechanical properties. In this study, precipitation-hardening alloys in the Zn-Ag-Cu system were developed using thermodynamic calculations and refined through thermomechanical treatment. However, the material showed susceptibility to aging, highlighting the importance of understanding the aging process for long-term mechanical stability and safety of the implant.
Article
Nanoscience & Nanotechnology
C. Suwanpreecha, J. U. Rakhmonov, S. Chankitmunkong, P. Pandee, D. C. Dunand, C. Limmaneevichitr
Summary: The addition of microalloying elements Sc and Zr in eutectic Al-6Ni alloy can create additional precipitates, resulting in substantial precipitation strengthening. The strength of the alloy at ambient and elevated temperatures can be quantitatively described by the superpositioning effect of Al-3(Sc,Zr) nano-precipitates and Al3Ni microfibers.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Lingying Ye, Xiaodong Liu, Jianguo Tang, Shengdan Liu, Yong Zhang
Summary: In an Al-Mg-Li alloy, S-1 phase precipitates in rod-shaped morphology at 300 degrees C, which are not dissolved until coarsening is finished at 400 degrees C. The dissolution of small precipitates and spheroidization of the rod-shaped precipitates reduce the total precipitate-matrix interface energy, providing the driving force for coarsening.
Article
Materials Science, Composites
S. Z. Zhu, D. Wang, Y. N. Zan, B. L. Xiao, Z. Y. Ma
Summary: The study successfully developed a new SiCp/Al-2Cu-1.2Mg-0.6Si composite with reduced natural aging strength and increased natural aging ductility, leading to higher yield strength after artificial aging. The new composite enriches the classification of SiCp/Al composites and shows great potential for application.
COMPOSITES COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Jyoti Ranjan Sahoo, Aparna Tripathi, Sumeet Mishra
Summary: A new low temperature interrupted quenching treatment (80°C_1h) is proposed for Al-Mg-Si alloys, exhibiting high work hardening ability, lower concentration of free vacancies, and stable precursors for β precipitates, leading to good formability during processing and high strength after final paint-bake treatment.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Hyeon-Woo Son, Sang-Hwa Lee, Sung-Ho Kang, Yong-You Kim, Kwangjun Euh
Summary: The effect of Ge addition on the delaying natural aging of Al-Mg-Si-Cu alloy was investigated. It was found that Ge addition suppressed the natural aging kinetics and cluster size. Atom probe tomography revealed that Ge refinement of cluster evolution was achieved by disturbing the magnesium enrichment of silicon-silicon clusters and enhancing vacancy trapping. Ge segregation at the cluster interface was also considered as a potential barrier to cluster growth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
E. Scharifi, U. Savaci, Z. B. Kavaklioglu, U. Weidig, S. Turan, K. Steinhoff
Summary: The research found that the tool temperature significantly affects the strength and microstructure of AA7075 aluminum alloy, causing fundamental changes in microstructure and strain hardening behavior when exceeding a certain temperature limit. At tool temperatures below 200℃, there is only a slight decrease in tensile strength, while above 200℃, there is a significant drop in tensile strength and an increase in the initial strain hardening rate.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Industrial
Zhuangzhuang Feng, Chunhui Liu, Peipei Ma, Jianshi Yang, Kailiang Chen, Guohui Li, Longhui Chen, Zhibin Huang
Summary: The study found that fast heating and short-term initial holding at 180 degrees Celsius is advantageous for improving the formability of AA7075-T4 alloy, while also increasing its ductility. By restricting the growth of coarsening precipitates before warm deformation, the hardening kinetics can be accelerated during post-aging, leading to the formation of a high density of precipitates.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Boguslawa Adamczyk-Cieslak, Milena Koralnik, Roman Kuziak, Kamil Majchrowicz, Tomasz Zygmunt, Jaroslaw Mizera
Summary: This paper presents the microstructural changes and mechanical properties of carbide-free bainitic steel subjected to various heat treatment processes and compares these results with similarly treated ferritic-pearlitic steel. The bainitic steel exhibited high ultimate tensile strength and total elongation, and the optimal microstructure and mechanical properties were obtained by optimizing the chemical composition and hot deformation followed by natural cooling. Isothermal transformation tests showed that the best relationship between strength and elongation was achieved after bainitic treatment at 400 degrees C.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Monika Chlewicka, Anna Dobkowska, Ryszard Sitek, Boguslawa Adamczyk-Cieslak, Jaroslaw Mizera
Summary: This study aimed to produce Ti-AlN via selective laser melting, and the results showed that the microstructure of the produced alloy was not uniform. X-ray diffraction measurements revealed that the Ti-AlN composite was composed of a Ti matrix, AlN compounds, and various intermetallics. The formation of Al-rich ternary phases after quenching improved the corrosion resistance of the 3D-printed Ti-AlN.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2022)
Article
Chemistry, Physical
Agnieszka Chmielewska, Bartlomiej Wysocki, Piotr Kwasniak, Miroslaw Jakub Kruszewski, Bartosz Michalski, Aleksandra Zielinska, Boguslawa Adamczyk-Cieslak, Agnieszka Krawczynska, Joseph Buhagiar, Wojciech Swieszkowski
Summary: This study investigates the use of different annealing heat treatments to improve the chemical and phase homogeneity of nickel-titanium alloy components fabricated using laser powder bed fusion (LPBF), and demonstrates that the two-step heat treatment is a promising method for achieving homogeneity in in situ alloyed NiTi powder.
Article
Materials Science, Multidisciplinary
Agnieszka Chmielewska, Bartlomiej Wysocki, Joseph Buhagiar, Bartosz Michalski, Boguslawa Adamczyk-Cieslak, Michal Gloc, Wojciech Swieszkowski
Summary: NiTi alloys are widely used in various industries, and Additive Manufacturing (AM) methods have become popular due to the difficulty in machining these alloys. Precise control of the chemical composition is crucial for determining the phase transition temperatures and shape memory behavior. Multiple remelting in AM processes improves material density and enhances chemical homogeneity. XRD analysis shows the presence of NiTi (B2) and (B19') phases, with nickel evaporation ranging from 1.6-3.0 wt% depending on the melting strategy.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Marta Orlowska, Ewa Ura-Binczyk, Lucjan Sniezek, Pawel Skudniewski, Mariusz Kulczyk, Boguslawa Adamczyk-Cieslak, Kamil Majchrowicz
Summary: This paper studies the corrosion resistance and mechanical properties of the 7075 aluminum alloy. The research aims to find the optimal correlation between the mechanical properties and the corrosion resistance of the alloy. The results show that a combination of precipitate hardening and a deformed microstructure leads to increased mechanical strength with high anisotropy due to the presence of fibrous grains. Further artificial aging also has a positive effect on corrosion resistance.
Article
Chemistry, Physical
Marta Orlowska, Ewa Ura-Binczyk, Lucjan Sniezek, Pawel Skudniewski, Mariusz Kulczyk, Boguslawa Adamczyk-Cieslak, Jaroslaw Mizera
Summary: The present study examines the relationship between mechanical properties and corrosion resistance of hydrostatically extruded aluminum alloy 7075. The results show that hydrostatic extrusion combined with aging can significantly enhance the mechanical strength and resistance to corrosion of the alloy.
Article
Metallurgy & Metallurgical Engineering
Anna Dobkowska, Lukasz Zrodowski, Monika Chlewicka, Milena Koralnik, Boguslawa Adamczyk-Cieslak, Jakub Ciftci, Bartosz Moronczyk, Miroslaw Kruszewski, Jakub Jaroszewicz, Dariusz Kuc, Wojciech Swieszkowski, Jaroslaw Mizera
Summary: In this study, powder metallurgy methods were used to fabricate Mg-7.5Li-3Al-Zn alloys from repowdered extruded alloys. LPBF and PPS processes were employed to consolidate the bulk materials. The LPBF and PPS materials exhibited refined microstructures but had drawbacks of porosity and unrecrystallized particle boundaries, which affected their corrosion resistance. However, powder metallurgy routes show great potential for the manufacture of Mg-Li based alloys.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Materials Science, Multidisciplinary
A. T. Krawczynska, L. Ciupinski, M. Gloc, D. Setman, M. Spychalski, P. Suchecki, B. Adamczyk-Cieslak, M. O. Liedke, M. Butterling, A. Wanger, E. Hirschmann, P. Petersson
Summary: The microstructure of Mo was refined by high pressure torsion, leading to increased microhardness and decreased grain size. Irradiation of the deformed Mo samples resulted in a slight decrease in total reflectivity, while the micrograined samples showed a more significant decrease.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Jaroslaw Wozniak, Mateusz Petrus, Tomasz Cygan, Boguslawa Adamczyk-Cieslak, Dorota Moszczynska, Andrzej Roman Olszyna
Summary: The article presents the process of synthesizing Ti3SiC2 powder and investigates the influence of molar ratio and carbon forms on the phase composition of the powders. The synthesis was conducted using a spark plasma sintering (SPS) furnace. Additionally, composites reinforced with SiC particles were produced using the synthesized powders. The results showed that the carbon form had no effect on the purity of the powders, while annealing significantly affected their purity.
Article
Metallurgy & Metallurgical Engineering
R. Sitek, J. Kaminski, B. Adamczyk-Cieslak, R. Molak, M. Spychalski, B. Cowell, J. McCann, E. Rolinski
Summary: This article presents the effect of an Indirect Plasma Nitriding process on the microstructure and properties of Titanium Grade-2 samples manufactured by Direct Metal Laser Sintering Method (DMLS). The results show that the physical and chemical phenomena occurring during nitriding have a decisive effect on surface roughening. The nitrided layer, formed in a pure nitrogen atmosphere, contains TiN + TiN0.30 + Ti2N, which exhibits compressive stress, high hardness, and Young's modulus compared to samples produced without nitriding. However, the nitrided samples have lower yield and tensile strength compared to the non-nitrided samples. Corrosion tests conducted in Ringer's solution at elevated temperatures indicate that nitriding improves the corrosion resistance of the alloy.
METALLOGRAPHY MICROSTRUCTURE AND ANALYSIS
(2022)
Article
Chemistry, Physical
Kamil Majchrowicz, Agata Sotniczuk, Boguslawa Adamczyk-Cieslak, Witold Chrominski, Pawel Jozwik, Zbigniew Pakiela, Halina Garbacz
Summary: The study aimed to compare the influence of microstructural and textural changes on the hardening by annealing effect in cold-rolled titanium. Different thickness reductions were applied to produce ultrafine-grained (UFG) Ti Grade 2, and the hardening effect was observed through a short-time annealing process. The results showed that the hardening effect was not related to texture changes, but rather to the annihilation of mobile dislocations and the ordering of the dislocation substructure within coarse grains.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Anna Dobkowska, Aleksandra Zielinska, Irena Paulin, Crtomir Donik, Maciej Lojkowski, Milena Koralnik, Boguslawa Adamczyk-Cieslak, Krystian Paradowski, Marek Tkocz, Dariusz Kuc, Jiri Kubasek, Matjaz Godec, Wojciech Swieszkowski
Summary: We investigated the microstructure, mechanical, and corrosion properties of an AZ61 alloy extruded using the KoBo method. The KoBo method enables extrusion of AZ61 without preheating and results in significant microstructure refinement. However, this study found that it did not enhance the strength or corrosion resistance of the AZ61 alloy. The continuously precipitated Mg17Al12 phase along the grain boundaries was identified as the main factor affecting the alloy's properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jaroslaw Mizera, Boguslawa Adamczyk-Cieslak, Piotr Maj, Pawel Wisniewski, Marcin Drajewicz, Ryszard Sitek
Summary: This study investigated the effects of an aluminization process on the microstructure and texture of Haynes 282 nickel samples fabricated using direct metal laser sintering. The results showed that the microstructure of the samples underwent changes after the laser sintering and aluminization steps, and the texture transformed from cast materials to recrystallization.
Article
Chemistry, Physical
Tomasz Borowski, Justyna Rospondek, Marek Betiuk, Boguslawa Adamczyk-Cieslak, Maciej Spychalski
Summary: An NbN coating was produced on AISI 316L steel using reactive DC magnetron sputtering. The oxidation of the NbN coating in air was investigated for its effects on microstructure, mechanical properties, corrosion resistance, contact angle, and bioactivity. The results showed that the air oxidized NbN coating exhibited a Ca/P ratio close to hydroxyapatite, as well as increased microhardness and corrosion resistance.
Article
Metallurgy & Metallurgical Engineering
T. Borowski, K. Kulikowski, M. Spychalski, K. Rozniatowski, B. Rajchel, B. Adamczyk-Cieslak, T. Wierzchon
Summary: This study investigates the modification of AISI 316L steel through nitrocarburizing treatment and DLC coatings deposition. The results show that the type of glow discharge and the nitrocarburized layer have a significant influence on the properties of the coatings.
ARCHIVES OF METALLURGY AND MATERIALS
(2022)
