scholarly journals Tribological aspects of some biodegradable magnesium alloys

2020 ◽  
Vol 12 (1) ◽  
pp. 83-89
Author(s):  
Bogdan ISTRATE ◽  
Corneliu MUNTEANU
Keyword(s):  
Magnesium Alloys ◽  
Coefficient Of Friction ◽  
Stainless Steels ◽  
Mechanical Characteristics ◽  
Structural Aspect ◽  
Biodegradable Materials ◽  
Medical Field ◽  
Biodegradable Magnesium ◽  
Biocompatible Alloys ◽  
Relative Constant

In recent years, biodegradable alloys have made their presence felt in a wide variety of fields, such as aeronautics, automotive and medical fields. Biodegradable alloys are considered to be the 3rd generation of biocompatible alloys, replacing classic alloys such as stainless steels and Co-Cr alloys. The paper aims to study the structural aspect and identify some mechanical characteristics of magnesium-calcium alloys used as biodegradable materials in the medical field. It has been observed the formation of a eutectic compound at the limit of magnesium grains and the relative constant value of the apparent coefficient of friction with increasing Ca concentration.

Examination of Biodegradable Magnesium Screw Processed by Equal Channel Angular Pressing: A Novel In Vivo Study in Rabbits

2018 ◽  
Vol 38 ◽  
pp. 31-37 ◽  
Author(s):  
Ista Damayanti ◽  
Benny Syariefsyah Latief ◽  
Abdul Latif ◽  
Bambang Pontjo Priosoeryanto ◽  
Sugeng Supriadi ◽  
...  
Keyword(s):  
Magnesium Alloys ◽  
Maxillofacial Surgery ◽  
Biodegradable Materials ◽  
Oral And Maxillofacial Surgery ◽  
Metallic Materials ◽  
Bioactive Glasses ◽  
Angular Pressing ◽  
Biodegradable Magnesium ◽  
Sufficient Strength

Magnesium alloys have shown potential as biodegradable metallic materials for oral and maxillofacial surgery applications due to their degradability. Biodegradable magnesium are advantageous over existing biodegradable materials such as polymers, ceramics and bioactive glasses in load-bearing applications where sufficient strength and Young’s modulus close to that of the bone are required.

scholarly journals Mimicking the Mechanical Properties of Aortic Tissue with Pattern-Embedded 3D Printing for a Realistic Phantom

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5042
Author(s):  
Jaeyoung Kwon ◽  
Junhyeok Ock ◽  
Namkug Kim
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
3D Printing ◽  
Mechanical Characteristics ◽  
Aortic Wall ◽  
Tensile Tests ◽  
Human Aorta ◽  
Aortic Tissue ◽  
Medical Field ◽  
Base Materials

3D printing technology has been extensively applied in the medical field, but the ability to replicate tissues that experience significant loads and undergo substantial deformation, such as the aorta, remains elusive. Therefore, this study proposed a method to imitate the mechanical characteristics of the aortic wall by 3D printing embedded patterns and combining two materials with different physical properties. First, we determined the mechanical properties of the selected base materials (Agilus and Dragonskin 30) and pattern materials (VeroCyan and TPU 95A) and performed tensile testing. Three patterns were designed and embedded in printed Agilus–VeroCyan and Dragonskin 30–TPU 95A specimens. Tensile tests were then performed on the printed specimens, and the stress-strain curves were evaluated. The samples with one of the two tested orthotropic patterns exceeded the tensile strength and strain properties of a human aorta. Specifically, a tensile strength of 2.15 ± 0.15 MPa and strain at breaking of 3.18 ± 0.05 mm/mm were measured in the study; the human aorta is considered to have tensile strength and strain at breaking of 2.0–3.0 MPa and 2.0–2.3 mm/mm, respectively. These findings indicate the potential for developing more representative aortic phantoms based on the approach in this study.

scholarly journals Differential apoptotic response of MC3T3-E1 pre-osteoblasts to biodegradable magnesium alloys in an in vitro direct culture model

2017 ◽  
Vol 28 (10) ◽  
Author(s):  
Ehsan Bonyadi Rad ◽  
Sepideh Mostofi ◽  
Matthias Katschnig ◽  
Patrik Schmutz ◽  
Magdalena Pawelkiewicz ◽  
...  
Keyword(s):  
Magnesium Alloys ◽  
Apoptotic Response ◽  
Culture Model ◽  
Biodegradable Magnesium

scholarly journals Cellular reactions to biodegradable magnesium alloys on human growth plate chondrocytes and osteoblasts

2013 ◽  
Vol 38 (4) ◽  
pp. 881-889 ◽  
Author(s):  
Karin Pichler ◽  
Tanja Kraus ◽  
Elisabeth Martinelli ◽  
Patrick Sadoghi ◽  
Giuseppe Musumeci ◽  
...  
Keyword(s):  
Growth Plate ◽  
Magnesium Alloys ◽  
Human Growth ◽  
Growth Plate Chondrocytes ◽  
Biodegradable Magnesium

Study on the Effects of Heat Treatments on the Physical and Mechanical Characteristics of 1.4301 Stainless Steel

2021 ◽  
Vol 42 ◽  
pp. 57-62
Author(s):  
Maria Stoicănescu
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Stainless Steels ◽  
Mechanical Characteristics ◽  
Austenitic Stainless Steels ◽  
Heat Treatments ◽  
Hot Plastic Deformation ◽  
Improved Characteristics ◽  
Physical And Mechanical Characteristics

The 1.4301 stainless steel is part of the category of austenitic stainless steels, steels which do no undergo heat treatments in general, as they are intended for hot plastic deformation in particular. The aim of the research presented in this paper was to obtain significantly improved characteristics of the resistance properties in relation to the values obtained under classical conditions, by applying heat treatments. Samples taken from the delivery state material underwent annealing, quenching and ageing heat treatments. Subsequently, the samples thus treated were subjected to tests enabling the determination of the correlations between the heat treatment parameters, the structure and the properties.

scholarly journals Influence of the process parameters on mechanical properties of the final parts obtained by selective laser sintering from PA2200 powder

2019 ◽  
Vol 299 ◽  
pp. 01001 ◽  
Author(s):  
Luciana Laura Dincă (Shamieh) ◽  
Nicoleta Mirela Popa ◽  
Nichita Larisa Milodin ◽  
Comsa Stanca ◽  
Doina Gheorghiu
Keyword(s):  
Process Parameters ◽  
Mechanical Characteristics ◽  
Selective Laser Sintering ◽  
Tensile Tests ◽  
Medical Applications ◽  
Medical Field ◽  
Preheating Temperature ◽  
Experimental Researches ◽  
Best Parameters ◽  
Different Parts

The paper describes how the process parameters affects the mechanical characteristics of laser selective sintered (SLS) parts used in applications of medical, automotive and aerospace fields. The greatest advantage of the additive manufacturing (AM) technology in the medical field is that it allows the use of the patient's medical CT images to obtain specific implants, providing high benefits for both patients and physicians. Despite its increasing use and advantages, the AM process has a series of problemssuch as: the difficulty in obtaining quality part, process interruption or manufacturing part failure. As such, there have been developed experimental researches in order to establish a correlation between the process parameters and the finished part properties. For this analysis, PA 2200 polyamide specimenswere obtained by SLS and subjected to tensile tests. The results correlate the process parameters, providing proof that the tensile properties of SLS specimen are dependent of orientation, position and preheating temperature. Based on the correlation between the process parameters and properties of the PA2200 polyamide, this paper provides a better understanding of the AM process and allows an anticipation onthe best parameters to be used on different parts, leading the optimizing of component properties for medical applications.

scholarly journals Advances in coatings on biodegradable magnesium alloys

2020 ◽  
Vol 8 (1) ◽  
pp. 42-65 ◽  
Author(s):  
Zheng-Zheng Yin ◽  
Wei-Chen Qi ◽  
Rong-Chang Zeng ◽  
Xiao-Bo Chen ◽  
Chang-Dong Gu ◽  
...  
Keyword(s):  
Magnesium Alloys ◽  
Biodegradable Magnesium
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