Article
Materials Science, Multidisciplinary
Bernoulli Andilab, Eli Vandersluis, Payam Emadi, Comondore Ravindran, Glenn Byczynski, Ricardo Fernandez-Gutierrez
Summary: This study investigates the influences of solidification rate and grain refinement on the microstructure, hardness, and electrical conductivity of an Al-Cu alloy for automotive cylinder heads. The results show that increasing the solidification rate and adding TiBor can refine the microstructure and increase the hardness. The main phase in this alloy is Al2Cu, and the conductivity is slightly reduced by TiBor additions.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Mechanics
Peirong Ren, Chengzhang Zhao, Zhengxing Zuo, Youfu Shui, Dongwei Li, Weiqing Huang
Summary: The study investigates the impact of thermal degradation on the mechanical properties of cast Al-Si alloys for cylinder heads. Thermal degradation primarily affects the tensile strength due to the coarsening and coalescence of the 0 phase (Al2Cu) caused by precipitation reaction. At 250 degrees C, the exposure temperature is the main factor for degradation, while at 200 degrees C, the exposure time has a greater influence. Thermal degradation significantly increases the rate of long crack growth by enlarging the plasticity scale ahead of the crack tip. The effective stress intensity factor range (ΔKeff) for thermally exposed alloys is modified by considering the plasticity zone size and the reduction in crack resistance from precipitates.
ENGINEERING FRACTURE MECHANICS
(2023)
Review
Materials Science, Ceramics
Amrit Mallick, Srinivasu Gangi Setti, Raj Kumar Sahu
Summary: In response to stricter environmental regulations and growing public awareness, significant progress has been made in improving internal combustion engines (ICEs) to reduce friction and wear. This article focuses on the challenges, various solutions, and the development of functionally graded composite materials (FGMs) for cylinder liners. The study discusses parameters that affect the mechanical and tribological properties of FGMs, compares them to existing aluminum liners, and proposes a framework for optimal material selection and processing. The article also presents the challenges, research opportunities, and potential for further developments in this field.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Maria V. Glavatskikh, Ruslan Yu. Barkov, Leonid E. Gorlov, Maxim G. Khomutov, Andrey V. Pozdniakov
Summary: The main weaknesses of commercial high-strength Al-Zn-Mg-Cu-based alloys are the low casting properties, corrosion and heat resistance. Alloys with a Zn/Mg ratio of 1 and a Cu/Y(Er) atomic ratio of 4 were developed to improve the casting properties and heat resistance of Al-Zn-Mg-Cu-based alloys. The microstructure, phase transformation, and tensile properties of the novel alloys were investigated.
Article
Materials Science, Multidisciplinary
Nilam S. Barekar, Ivan Skalicky, Shihao Wang, Pavel Shurkin, Onuh Adole, N. Hari Babu, Martin Jarrett
Summary: This paper presents the first trial of using a novel Al-Ni-B grain refiner in the manufacturing of Al-Si wrought piston alloys. The results show that the addition of Nb-B inoculant leads to a refined as-cast structure and a more homogenous distribution of the solute. However, billet homogenization affects the precipitation and properties, and non-homogenized specimens perform better during machining and tensile testing.
Article
Chemistry, Physical
Spyridon Chaskis, Eva Stachouli, Evangelos Gavalas, Marianthi Bouzouni, Spyros Papaefthymiou
Summary: In this study, a novel complex concentrated aluminum alloy was designed and studied using the CALPHAD method. The alloy exhibited a multiphase microstructure with an alpha-Al matrix and various secondary phases. The mechanical properties of the alloy were also investigated, showing high hardness and compressive strength.
Review
Metallurgy & Metallurgical Engineering
Gerry Gang Wang, J. P. Weiler
Summary: The use of magnesium alloy high pressure die cast (HPDC) components for weight reduction in automotive and transportation industries is increasing. This paper reviews recent developments in HPDC magnesium alloys for transportation applications, highlighting their improved properties compared to conventional alloys. The evaluated characteristics include die castability, mechanical properties at elevated temperatures, and ductility, and the results suggest that these alloys have great potentials for actual automotive and transport applications.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Automation & Control Systems
Nicholas Andreae, Dharmendra Chalasani, Mukesh Jain
Summary: Magnesium alloys have advantages in lightweight, low density, and high strength to weight ratio. However, joining magnesium alloys with other materials is a challenge in the automotive industry. This study proposes a new joining technique called Upset Protrusion Joining (UPJ) and evaluates its characteristics. The results show that UPJ can achieve reliable connections between die-cast magnesium alloys and aluminum alloy sheets under certain process conditions.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Olga I. Mamzurina, Sayed M. Amer, Maria V. Glavatskikh, Ruslan Yu. Barkov, Irina S. Loginova, Andrey V. Pozdniakov
Summary: The present study developed novel heat resistant cast Al-Cu-Yb(Gd)-Mg-Mn-Zr alloys and investigated their microstructures and mechanical properties. The results showed that the combination of ytterbium with zirconium and titanium can better refine the aluminum grains. L1(2)-Al-3(Zr,Yb) or L1(2)-Al-3(Zr,Gd) and Al20Cu2Mn3 phases were precipitated during solution treatment. The alloys achieved the highest hardening effect through aging at 210 degrees C, and demonstrated potential for high temperature applications.
Article
Nanoscience & Nanotechnology
Tiffany Wu, A. Plotkowski, A. Shyam, David C. Dunand
Summary: This study investigates the microstructures, thermal stability, ambient temperature strengthening, and creep resistance of three ternary Al-Ce-Ni alloys. The results show that the high volume fraction of intermetallic phases and extremely fine eutectic spacing/fiber diameter contribute to high ambient strengthening and enhanced creep resistance. The alloys also exhibit coarsening resistance up to 425 degrees C and remain substantial creep resistance at 300 degrees C, making them excellent materials for high temperature applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Automation & Control Systems
Pavel Olegovich Yuryev, Vladimir Nikolaevich Baranov, Tamara Aleksandrovna Orelkina, Aleksandr Innokentyevich Bezrukikh, Denis Sergeevich Voroshilov, Maksim Yurievich Murashkin, Evgeniy Gennadyevich Partyko, Igor Lazarevich Konstantinov, Valentin Viktorovich Yanov, Nikita Andreevich Stepanenko
Summary: The experimental alloy, containing small additions of scandium, zirconium, and manganese, was found to form a supersaturated solid solution in the ingot, leading to the formation of a subgrain structure with Al6Mn and Al-3(Sc, Zr) phases during annealing and subsequent hot and cold rolling. This explains the dispersion and structural hardening of sheet semi-finished products. Additionally, it was discovered that the mechanical properties of cold-rolled sheets from the experimental alloy surpass those of alloy 5083 with the same magnesium content, but are comparable to those of alloy 1570 with a higher scandium content.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
C. S. Hattori, G. F. C. Almeida, R. L. P. Goncalves, R. G. Santos, R. C. Souza, W. C. da Silva Jr, J. R. C. Cunali Jr, A. A. Couto
Summary: This study aimed to obtain two aluminum alloys by extrusion, evaluating their microstructural characteristics and fatigue behavior. AA7046 exhibited better tensile and fatigue properties compared to AA7108.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Jian Rong, Jia-Ning Zhu, Wenlong Xiao, Xinqing Zhao, Chaoli Ma
Summary: A new Mg-3RE-0.5Zn alloy with high thermal conductivity and acceptable mechanical properties for high pressure die casting has been developed in this study. The combination of superior thermal conductivity and high strength in this alloy is attributed to its unique alloy composition and microstructure. The results of this study will be beneficial for developing new high performance HPDC Mg alloys and promoting their wider application.
Article
Chemistry, Physical
Xixi Dong, Hamza Youssef, Xiangzhen Zhu, Yijie Zhang, Shihao Wang, Shouxun Ji
Summary: The addition of titanium diboride nanoparticles can enhance the strength and maintain ductility of die-cast AlSi9Cu2Mg alloy. Fe-rich compounds and Q-phase were prone to cracking after the addition of titanium diboride nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Anna Dziubinska
Summary: This article introduces a new technology for forming automotive connecting rod forgings using die forging from cast performs of EN AB-71100 aluminum alloy. The process was analyzed considering different deformation rates related to the type of machine used. Numerical analysis was carried out using the finite element method and simulations using Deform 3D software. The results confirmed the possibility of producing defect-free forgings of connecting rods using the proposed technology.