Article
Materials Science, Multidisciplinary
Lin Mao, Xin Zheng, Yongji Tian, Yiling Shi, Xiaochen Zhang, Chengli Song
Summary: This study simulated the process of ligating blood vessels using biodegradable Mg alloy hemostatic clips and investigated the effects of different parameters on the clamping performance. Results showed that clips with transverse teeth caused the minimum stress on blood vessels. Additionally, an optimally designed Mg alloy clip exhibited excellent performance and corrosion resistance, making it a promising candidate for applications with biodegradable hemostatic clips.
Article
Chemistry, Physical
Pham Hong Quan, Iulian Antoniac, Florin Miculescu, Aurora Antoniac, (Paltanea) Veronica Manescu, Alina Robu, Ana-Iulia Bita, Marian Miculescu, Adriana Saceleanu, Alin Danut Bodog, Vicentiu Saceleanu
Summary: Fluoride conversion coatings can improve the biodegradability and corrosion resistance of magnesium alloys, making them potentially suitable for manufacturing cardiovascular stents and biodegradable orthopedic implants.
Article
Chemistry, Physical
Ya Liu, Jiuba Wen, Huan Li, Junguang He
Summary: The effects of extrusion temperature and extrusion ratio on the microstructure, corrosion resistance, and mechanical properties of Mg-Zn-Gd-Y-Zr alloy were investigated. Higher extrusion temperatures and larger extrusion ratios were found to result in better mechanical properties and corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xiaoya Chen, Quanan Li, Jinglong Yan, Peijun Chen
Summary: This study systematically investigates the microstructure and high temperature mechanical properties of Mg-10Gd-3Y-xNd-0.5Zr alloy. It is found that Nd element promotes the precipitation phase and forms a new phase Mg41Nd5, while the appropriate amount of Nd refines the grain size. The Mg-10Gd-3Y-xNd-0.5Zr alloy exhibits excellent mechanical properties at both room and high temperatures, with significant ultimate tensile strengths. The main strengthening phases are p phase, p' phase, and 18-LPSO phase. Moreover, the alloy shows excellent high-temperature creep resistance and the creep mechanism changes with temperature and stress.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Cong Dang, Xiaoxu Dou, Jingfeng Wang, Di Yu, Jinxing Wang, Ruopeng Lu, Hua Hou, Yuhong Zhao
Summary: Different solution treatments at different temperatures were conducted on the Mg-9.55Gd-2.27Y-1.28Zn-0.55Zr-0.11Nd alloy, resulting in different phase constitutions. The Mg3RE-type eutectic phases transformed into long period stacking order (LPSO) phases with various morphologies after solution treatment. Increasing the solution temperature led to larger grain size, more lamellar LPSO phases, and segregation of Zr element. The special spatial structure consisting of prismatic b' precipitates, basal g' precipitates, and lamellar LPSO phases hindered dislocation movement effectively, leading to high strength, but also caused premature cracking and decreased ductility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Radu Emil Hendea, Doina Raducanu, Anna Nocivin, Steliana Ivanescu, Doina Stanciu, Corneliu Trisca-Rusu, Radu Septimiu Campian, Silviu Iulian Drob, Vasile Danut Cojocaru, Bogdan Mihai Galbinasu
Summary: The aim of this study is to apply laser powder bed fusion process to a new biodegradable Mg-Zn-Zr-Ca alloy powder, in order to achieve high biomechanical and biochemical performance. The experimental results indicate that lower laser energy density can lead to robust and homogeneous samples.
Article
Chemistry, Multidisciplinary
Viktor Greshta, Vadim Shalomeev, Svitlana Bovkun, Ivan Petryshynets, Vasily Efremenko, Michail Brykov
Summary: This work proposes a method to enhance the mechanical properties of a biodegradable Mg-Nd-Zr alloy by modifying it with noble metals (Ag and Au). The separate and combined effects of silver and gold on the macro- and microstructure of the alloy are studied. The addition of noble metals increases the volume fraction of intermetallic compounds and refines the structural components of the alloy, resulting in increased strength and ductility. This modification technology is feasible for the production of implants for osteosynthesis.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Doina Raducanu, Vasile Danut Cojocaru, Anna Nocivin, Radu Hendea, Steliana Ivanescu, Doina Stanciu, Corneliu Trisca-Rusu, Silviu Iulian Drob, Elisabeta Mirela Cojocaru
Summary: The present paper applies the mechanical alloying process to obtain a new biodegradable Mg-based alloy powder with high biomechanical and biochemical performance from the system Mg-xZn-Zr-Ca. Various processing parameters have been experimented to establish an efficient processing route for small biodegradable parts in the medical domain. The composition of the powders influences the size and shape, while the highest milling speed and time result in finer, round-shaped powder particles without pores or inclusions. The powder sample with 10 wt.%Zn exhibits the most uniform size. The powders are further processed by selective laser melting to obtain a homogeneous experimental sample for future trials.
Review
Chemistry, Physical
Alexei Vinogradov, Evgeniy Merson, Pavel Myagkikh, Mikhail Linderov, Alexandr Brilevsky, Dmitry Merson
Summary: This article provides an overview of achievements and knowledge gaps in the field of biodegradable magnesium alloys. It focuses on the popular Mg-Zn-Ca system as a representative example. The article reviews processing techniques and functional properties achieved through various processing routes. It also discusses corrosion properties, mechanical-chemical interactions, and challenges faced by researchers in this area.
Article
Materials Science, Multidisciplinary
Wenchao Hu, Wanyi Huang, Ying Sun, Wen Zhang, Lili Tan, Song Zhang, Guangcai Ma, Dan Zhang, Qiang Wang
Summary: In this study, fatigue properties of Mg-2Zn-0.5Zr-0.5Nd alloy were tested and it was found that the fatigue life varies with different frequencies. It was also observed that the alloy exhibits poorer fatigue resistance in 0.9 wt% NaCl solution.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
S. Thanka Rajan, Mitun Das, A. Arockiarajan
Summary: In this study, tantalum oxide thin films were deposited onto the surface of AZ31B alloy using the sputtering process, and their biocompatibility and corrosion resistance were evaluated. The results showed that the Ta-based thin films significantly enhanced the corrosion resistance of the magnesium alloy, exhibited good bioactivity, and had good hemocompatibility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jianwei Dai, Qiangsheng Dong, Yujin Nie, Yongqiang Jia, Chenglin Chu, Xiaobo Zhang
Summary: The microstructures, mechanical properties, and corrosion behaviors of Mg-4Gd-xY-1Zn-0.5Ca-1Zr (x = 1, 3, and 5 wt.%) alloys under as-cast condition were investigated. It was found that Y addition significantly improved the yield strength and corrosion resistance of the alloys.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Zexi Gao, Chuming Liu, Shunong Jiang, Yonghao Gao, Yingchun Wan, Zhiyong Chen
Summary: The formation mechanism of abnormal texture and strengthening mechanisms in the extruded Mg-Gd-Y-Nd-Zr alloy are investigated. It is found that the presence of rare-earth elements plays a crucial role in the formation of abnormal texture, and solid solution strengthening has a significant impact on the stability of the alloy's mechanical properties.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Pi-Chen Lin, Kaifan Lin, Yu-Hsuan Lin, Kai-Chiang Yang, Vladimir Ivanovitch Semenov, Hsin-Chih Lin, Miin-Jang Chen
Summary: Polycrystalline HfZrO2 (HZO) film can enhance the corrosion resistance and reduce the corrosion rate of as-extruded Mg-Ca alloy. Compared to ZrO2 film, HZO film exhibits better short-term corrosion resistance. HZO film shows low toxicity and is suitable for the protective coating of biological implants.
Article
Materials Science, Multidisciplinary
C. Ha, J. Bohlen, X. Zhou, H-G Brokmeier, K. U. Kainer, N. Schell, D. Letzig, S. Yi
Summary: This study investigated the differences in texture development and active deformation mechanisms during sheet rolling for binary Mg-RE or Mg-Ca alloys compared to their ternary counterparts with Zn. The analyses were based on in-situ synchrotron experiments and electron backscatter diffraction measurements, revealing direct experimental evidence of texture development and active deformation mechanisms. Higher activations of nonbasal a c+a 1010 a a c+a a slip in the Zn-containing ternary alloys were confirmed through EBSD misorientation analysis.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Tomer Ron, Galit Katarivas Levy, Ohad Dolev, Avi Leon, Amnon Shirizly, Eli Aghion
Article
Materials Science, Multidisciplinary
Lilach Elkaiam, Orly Hakimi, Eli Aghion
Article
Chemistry, Physical
Tomer Ron, Ohad Dolev, Avi Leon, Amnon Shirizly, Eli Aghion
Summary: The stress corrosion behavior of additively manufactured austenitic stainless steel was evaluated compared to wrought alloy via electrochemical analysis and slow strain rate testing. Despite differences in microstructure and mechanical properties, both materials showed similar electrochemical performance and stress corrosion susceptibility. Corrosion in the additively manufactured alloy mainly concentrated at the interface between the austenitic matrix and secondary ferritic phase, while the wrought alloy exhibited uniform pitting on the external surface. Both alloys exhibited ductile failure in post-SSRT experiments.
Article
Materials Science, Multidisciplinary
Orit Avior, Noa Ben Ghedalia-Peled, Tomer Ron, Razi Vago, Eli Aghion
Article
Chemistry, Physical
Noa Gabay, Tomer Ron, Razi Vago, Amnon Shirizly, Eli Aghion
Summary: This study evaluated a novel osseointegrated implant system based on a Ti-6Al-4V lattice infiltrated with a biodegradable Zn2%Fe alloy. The results demonstrate that this implant system exhibits good mechanical properties and corrosion resistance.
Article
Materials Science, Multidisciplinary
Orit Avior, Noa Ben Ghedalia-Peled, Tomer Ron, Jeremy Goldman, Razi Vago, Eli Aghion
Summary: Due to its excellent biocompatibility, zinc and zinc-based alloys have attracted great interest for the development of biodegradable implants. However, fibrous encapsulation reactions can occur, isolating the implant and affecting its function. The use of a zinc-iron-calcium alloy has shown promise in overcoming this issue, with suitable corrosion rate, mechanical properties, and unique microstructure. This study further evaluated the corrosion performance, stress corrosion behavior, and cell viability of the alloy.
Article
Materials Science, Multidisciplinary
Maxim Bassis, Abram Kotliar, Rony Koltiar, Tomer Ron, Avi Leon, Amnon Shirizly, Eli Aghion
Summary: The study evaluated the stress corrosion resistance of 316L stainless steel produced by the WLAM process and found that the WLAM samples exhibited inferior mechanical properties, corrosion resistance, and stress corrosion performance compared to the regular AISI 316L alloy. These differences were mainly attributed to variations in phase compositions, structural morphology, and inherent defects between the WLAM alloy and AISI 316L alloy.
Article
Chemistry, Physical
Tomer Ron, Avi Leon, Vladimir Popov, Evgeny Strokin, Dan Eliezer, Amnon Shirizly, Eli Aghion
Summary: The interest in refractory high-entropy alloys (HEAs) has grown in the last decade due to their thermal stability, mechanical properties, and corrosion resistance. However, their drawbacks in processing and machining operations hinder their use as common structural materials. The recent progress in additive manufacturing (AM) technologies has provided the option to produce complex components made of HEAs with minimal machining processes.
Article
Materials Science, Multidisciplinary
Ohad Dolev, Tomer Ron, Eli Aghion, Amnon Shirizly
Summary: The widespread use of Additive Manufacturing (AM) technology allows engineers and designers to manufacture complex geometries that cannot be achieved with conventional techniques. The Hot Isostatic Press (HIP) process can improve material quality, but it may affect the fatigue limit. This study examines the effect of HIP process on TI-6Al-4V parts.
Article
Materials Science, Multidisciplinary
Lital Ben Tzion-Mottye, Tomer Ron, Dan Eliezer, Eli Aghion
Summary: Zn-based alloys are attractive for biodegradable implants due to their excellent biocompatibility and antibacterial properties, but they have lower mechanical properties and can cause fibrous encapsulation. By adding Fe to pure Zn, a microgalvanic effect can be created to increase biodegradation rate, which was examined in this study with the addition of up to 0.8% Mn.
Article
Chemistry, Physical
Maxim Bassis, Tomer Ron, Avi Leon, Abram Kotliar, Rony Kotliar, Amnon Shirizly, Eli Aghion
Summary: This study evaluated the corrosion fatigue behavior of 316L stainless steel produced by a wire laser additive manufacturing (WLAM) process and found that it performed worse than traditional stainless steel. This is mainly due to the duplex microstructure, reduced passivity, and the presence of interlayer porosity in WLAM alloys.
Article
Materials Science, Multidisciplinary
Noa Gabay Bass, Galit Katarivas Levy, Tomer Ron, Razi Vago, Jeremy Goldman, Amnon Shirizly, Eli Aghion
Summary: This study investigates the potential of a hybrid Ti-Zn system as an osseointegrated implant for dental and orthopedic applications. The results show that the hybrid material has desirable properties, including non-cytotoxicity and an acceptable corrosion rate.
Review
Chemistry, Physical
Tomer Ron, Amnon Shirizly, Eli Aghion
Summary: Additive manufacturing is an innovative method for producing high entropy alloy components with unique mechanical and environmental properties. Various AM processes such as powder bed fusion, direct energy deposition, material extrusion, and binder jetting can be used to fabricate HEA components. The microstructure and mechanical properties of AM-produced HEAs can be significantly affected by processing parameters and post-processing heat treatment.
Article
Materials Science, Multidisciplinary
Maxim Bassis, Tomer Ron, Amnon Shirizly, Eli Aghion
Summary: The microstructure modifications in WLAM alloy have a significant detrimental effect on stress corrosion resistance.