IF 2.1 4区材料科学

JOM Pub Date : 2025-03-14 DOI: 10.1007/s11837-025-07270-w

Daniel Valdés, Juan Manuel García Zapata, Irene Limón, Belén Torres, Joaquín Rams, Marta Multigner

{"title":"Innovative Stent Test Specimen by Additive Manufacturing for Reliable Mechanical Testing and Simulation","authors":"Daniel Valdés, Juan Manuel García Zapata, Irene Limón, Belén Torres, Joaquín Rams, Marta Multigner","doi":"10.1007/s11837-025-07270-w","DOIUrl":"10.1007/s11837-025-07270-w","url":null,"abstract":"<div><p>Cardiovascular diseases are the leading cause of mortality globally, underscoring the importance of reliable treatments such as cardiovascular stents, which prevent arterial collapse and improve blood flow. Despite their widespread use, stents face challenges in mechanical performance and biological compatibility. This study focuses on the mechanical characterization of biodegradable metallic stents, addressing limitations in current testing methods and simulations. Novel specimen geometries, designed for tensile strength testing, were developed using additive manufacturing (AM) to minimize damage from gripping clamps during testing. Finite element modeling simulations and experimental tests were conducted to evaluate the mechanical behavior of stents under ideal and real-world conditions. The results revealed that the values provided by the most common mechanical tests and simulations do not correspond to the actual values of the meshed structure. The proposed geometries demonstrated consistent mechanical behavior, effectively mitigating stress concentrations and enabling reliable data acquisition. These findings highlight the potential of AM in stent testing and validate the integration of experimental and simulation approaches for optimizing stent design and performance. This study establishes a framework for future research aimed at improving stent safety and reliability.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 6","pages":"4430 - 4444"},"PeriodicalIF":2.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11837-025-07270-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Processing Conditions Dependent Evolution of Microstructure in Laser Additive Manufactured HT-9 Ferritic Martensitic Steel 激光增材制造HT-9铁素体马氏体钢的显微组织演变

IF 2.1 4区材料科学

JOM Pub Date : 2025-03-13 DOI: 10.1007/s11837-025-07304-3

Madhavan Radhakrishnan, Shashank Sharma, Selvamurugan Palaniappan, K. N. Chaithanya Kumar, Krishna Kamlesh Verma, Narendra B. Dahotre

引用次数: 0

Pin-Type Bearing Strength and Fracture Behaviour of Ductile LPBF Ti-6Al-4V ELI Produced with Extensively Reused Powder 用大量重复使用的粉末生产的韧性 LPBF Ti-6Al-4V ELI 的针型轴承强度和断裂行为

IF 2.1 4区材料科学

JOM Pub Date : 2025-03-12 DOI: 10.1007/s11837-025-07162-z

Duncan W. Gibbons, Andre F. van der Merwe

{"title":"Pin-Type Bearing Strength and Fracture Behaviour of Ductile LPBF Ti-6Al-4V ELI Produced with Extensively Reused Powder","authors":"Duncan W. Gibbons, Andre F. van der Merwe","doi":"10.1007/s11837-025-07162-z","DOIUrl":"10.1007/s11837-025-07162-z","url":null,"abstract":"<div><p>Metal additive manufacturing is a manufacturing technology that is being investigated for critical industrial applications in industries such as aerospace, nuclear, and medical. A degree of uncertainty remains around these technologies largely due to process and material repeatability, production controls, and a lack of application-specific material data. This research aimed to investigate the effects of extensively reused (175 reuse cycles) Ti-6Al-4V ELI powder feedstock and build orientation on the produced material. Material chemistry, metallography, pin-type bearing strength, and tensile properties were characterized at different build locations and principal orientations. The literature on pin-type bearing strength for both traditionally and additively manufactured material is lacking. Such information is of value for the design of bolted structural joints and fixtures. The results suggest that although extensively reused powder feedstock does experience drift in material properties due to the reuse process, it can still fulfil feedstock material specification requirements. Furthermore, this powder is capable of producing material that meets produced material specification requirements, exhibits minimal orthotropy in mechanical properties, and has ultimate bearing strength that exceeds Ti-6Al-4V grade 5 wrought material allowables. This research provides valuable information for designing structural joints and contributes to the further industrialization of laser powder bed fusion for critical applications.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 4","pages":"1885 - 1897"},"PeriodicalIF":2.1,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11837-025-07162-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-Month In Vitro Degradation of 3D-Printed Biodegradable FeMnC Alloys for Biomedical Applications 用于生物医学应用的3d打印可生物降解FeMnC合金的两个月体外降解

IF 2.1 4区材料科学

JOM Pub Date : 2025-03-12 DOI: 10.1007/s11837-025-07274-6

Abdelhakim Cherqaoui, Quang Nguyen Cao, Carlo Paternoster, Simon Gélinas, Magdalena Bieda, Anna Jarzębska, Carl Blais, Diego Mantovani

{"title":"Two-Month In Vitro Degradation of 3D-Printed Biodegradable FeMnC Alloys for Biomedical Applications","authors":"Abdelhakim Cherqaoui, Quang Nguyen Cao, Carlo Paternoster, Simon Gélinas, Magdalena Bieda, Anna Jarzębska, Carl Blais, Diego Mantovani","doi":"10.1007/s11837-025-07274-6","DOIUrl":"10.1007/s11837-025-07274-6","url":null,"abstract":"<div><p>Over the last decade, Fe-Mn-based bioresorbable implants have attracted significant interest due to their outstanding mechanical properties, including ductility and strength, and their ability to degrade over medium-to-long healing periods, eliminating the need for secondary surgeries for implant removal. However, their slow degradation under physiological conditions limits their practical use, especially for short-term degradable implants. Additive manufacturing facilitates rapid production with tailored compositions, offering advantages over traditional casting methods. Yet, the structure, the microstructure, the degradation behavior, and the mechanical properties are known to be impacted by the fabrication methods. In this context, this study investigates the degradation behavior of 3D-printed FeMnC alloys produced via laser powder bed fusion using volumetric energy densities from 75 J/mm<sup>3</sup> to 87 J/mm<sup>3</sup>. Microstructure and degradation rate relationships were explored through microstructural characterization (SEM, XRD, EBSD) and static immersion tests in modified Hanks' solution over 60 days. XRD confirmed a fully austenitic microstructure in all conditions, while SEM and EBSD revealed refined structures along the building direction. The alloy printed at 87 J/mm<sup>3</sup> exhibited the lowest degradation rate for both immersion periods, with values near 0.04 mm/year after 14 days and 0.03 mm/year after 60 days.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 6","pages":"4414 - 4429"},"PeriodicalIF":2.1,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11837-025-07274-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anisotropic Suppression of Martensitic Transformation in Precipitation-Hardened NiTiHf High-Temperature Shape Memory Alloys 沉淀硬化NiTiHf高温形状记忆合金马氏体相变的各向异性抑制

IF 2.1 4区材料科学

JOM Pub Date : 2025-03-11 DOI: 10.1007/s11837-025-07242-0

Eitan Hershkovitz, Timothy Yoo, Flavia da Cruz Gallo, Garrett Baucom, Michele V. Manuel, Honggyu Kim

{"title":"Anisotropic Suppression of Martensitic Transformation in Precipitation-Hardened NiTiHf High-Temperature Shape Memory Alloys","authors":"Eitan Hershkovitz, Timothy Yoo, Flavia da Cruz Gallo, Garrett Baucom, Michele V. Manuel, Honggyu Kim","doi":"10.1007/s11837-025-07242-0","DOIUrl":"10.1007/s11837-025-07242-0","url":null,"abstract":"<div><p>The reversible and diffusionless martensitic transformation of shape memory alloys (SMAs) has spurred their development for shape memory-based devices such as nano- and micro-electromechanical systems. However, when the size of a SMA is reduced to the scale of a few hundred nanometers, its shape memory effect becomes diminished and can eventually be suppressed. To investigate the microscopic origin of this behavior, we have characterized the thermally-induced martensitic transformation in precipitation-hardened NiTiHf high-temperature SMAs, using four-dimensional scanning transmission electron microscopy and in situ heating experiments. We show a distinct anisotropic suppression of the martensitic phase transformation, where B19′ martensite is successfully transformed into B2 austenite, while the reverse transformation is completely suppressed. Quantitative phase and strain analysis reveal strain accumulation in the austenite matrix, specifically a unique buildup of shear strain surrounding precipitates embedded in the matrix phase. This result indicates that the suppression of the martensitic transformation in precipitation-hardened SMAs is not solely due to extrinsic effects like the buildup of non-transforming oxides on the alloy surface, and that there is an additional intrinsic mechanism inhibiting the full shape memory transformation. Our findings encourage future research on the feasibility of scalable shape memory devices in the sub-hundred nanometer regime.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 5","pages":"2852 - 2861"},"PeriodicalIF":2.1,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Meet 2025 TMS President Dan Miracle 这是2025年TMS总裁Dan Miracle

IF 2.1 4区材料科学

JOM Pub Date : 2025-03-11 DOI: 10.1007/s11837-025-07296-0

Dan Miracle

引用次数: 0

Dr. James Douglas: The Founder of American Copper 詹姆斯-道格拉斯博士美国铜业的创始人

IF 2.1 4区材料科学

JOM Pub Date : 2025-03-10 DOI: 10.1007/s11837-025-07297-z

Phillip Mackey, William Culver

引用次数: 0

Artificial Intelligence, ICME, and 3D Materials Science Meet at TMS Specialty Congress 2025 人工智能，ICME和3D材料科学在2025年TMS专业大会上会面