Additive manufacturing letters最新文献_第2页

Effects of extreme deposition rate on the microstructure evolution of additive friction stir deposited AA6061 alloy

IF 4.2

Additive manufacturing letters Pub Date : 2025-01-19 DOI: 10.1016/j.addlet.2025.100269

Lu Jiang, Ramesh Varma, Mahendra Ramajayam, Thomas Dorin, Matthew Robert Barnett, Daniel Fabijanic

{"title":"Effects of extreme deposition rate on the microstructure evolution of additive friction stir deposited AA6061 alloy","authors":"Lu Jiang, Ramesh Varma, Mahendra Ramajayam, Thomas Dorin, Matthew Robert Barnett, Daniel Fabijanic","doi":"10.1016/j.addlet.2025.100269","DOIUrl":"10.1016/j.addlet.2025.100269","url":null,"abstract":"<div><div>Additive manufacturing (AM) using additive friction stir deposition (AFSD) offers unique advantages over traditional liquid-solid state transitions, notably the ability to plasticise materials through frictional and deformation heat and build a bulk deposit via discrete layers without melting. Although inherently a large-scale and high deposition rate process, the boundaries of deposition rates have not been explored. In this work, we explored a deposition rate 4–29 times faster than typical for aluminium AFSD processing. The microstructure analyses of the deposited AA6061 alloys reveal a distinct grain structure and precipitation between the slow and fast depositions, attributed to the varied thermal and mechanical histories stemming from differences in tool velocity. The AFSD process also effectively refines the constituent intermetallic phases, resulting in more uniform sizes due to high temperatures and strains experienced during deposition. Energy consumption analysis revealed significant efficiency improvement associated with the fast deposition.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"13 ","pages":"Article 100269"},"PeriodicalIF":4.2,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of ultra-thin porous titanium alloys by electron beam selective melting: Porosity and mechanical properties

IF 4.2

Additive manufacturing letters Pub Date : 2025-01-12 DOI: 10.1016/j.addlet.2025.100268

Jinhu Liu , Feihong Wang , Dong Lu , Yongfeng Liang , Junpin Lin

{"title":"Fabrication of ultra-thin porous titanium alloys by electron beam selective melting: Porosity and mechanical properties","authors":"Jinhu Liu , Feihong Wang , Dong Lu , Yongfeng Liang , Junpin Lin","doi":"10.1016/j.addlet.2025.100268","DOIUrl":"10.1016/j.addlet.2025.100268","url":null,"abstract":"<div><div>Titanium alloys are widely regarded as ideal biomaterials due to their superior mechanical properties and resistance to corrosion. Additive manufacturing offers a novel approach for fabricating porous structures, enabling the production of titanium alloys with intricate geometries and varied dimensions. In this study, porous titanium alloys were produced using the Ti-6Al-2Zr-2V-1Mo alloy via electron beam selective melting (EBSM). Thin-wall structures with thicknesses ranging from 360 μm to 600 μm demonstrated exceptional mechanical performance near the forming threshold. An increase in porosity from 22 % to 32 % was observed, resulting in a reduction in tensile strength from 350 MPa to 250 MPa. Tensile testing and microstructural analyses revealed that precise control of the electron beam spot diameter facilitated effective metallurgical bonding between powder particles, with residual pores comparable in size to the original powder. This work highlights a promising strategy for fabricating titanium alloys tailored for biomedical applications.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"13 ","pages":"Article 100268"},"PeriodicalIF":4.2,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hot forming behavior of tungsten carbide reinforced Ni-Based superalloy 625 additively manufactured by laser directed energy deposition

IF 4.2

Additive manufacturing letters Pub Date : 2025-01-07 DOI: 10.1016/j.addlet.2025.100267

Gökhan Ertugrul , Aliakbar Emdadi , Angelika Jedynak , Sabine Weiß , Sebastian Härtel

{"title":"Hot forming behavior of tungsten carbide reinforced Ni-Based superalloy 625 additively manufactured by laser directed energy deposition","authors":"Gökhan Ertugrul , Aliakbar Emdadi , Angelika Jedynak , Sabine Weiß , Sebastian Härtel","doi":"10.1016/j.addlet.2025.100267","DOIUrl":"10.1016/j.addlet.2025.100267","url":null,"abstract":"<div><div>The demands of high-performance industries such as aerospace, automotive, tool manufacturing, oil, and gas industries are driving the innovation in high-performance materials and their production methods. This study explores the impact of hybrid manufacturing, specifically the effect of the addition of tungsten carbide (WC/W2C) via Laser-Directed Energy Deposition (L-DED), on the hot workability, hardness, and microstructure of nickel-based superalloy Inconel 625 (IN625). IN625 is known for its high temperature and high corrosion resistance, and tungsten carbide for its high wear resistance and grain refinement effect. The integration of WC/W2C particles into the IN625 matrix, in addition to the use of the hybrid approach of additive manufacturing followed by a hot–forming process, significantly influences the microstructure and mechanical behavior of the material. Thus, while incorporation of the WC/W2C can strengthen the material and extend the mechanical limitations, its full impact, including any potential usages, should be thoroughly evaluated for the intended application of the materials. To understand the effect of WC/W2C, additive manufacturing of IN625 both with and without WC/W2C and isothermal hot compression was carried out. The objective is to analyze the differences in microstructure and properties between <span>L</span>-DED manufactured IN625, and WC-reinforced IN625, and their hot-forming behavior, focusing on the effects of WC addition and post-deformation on microstructure and mechanical properties. This work represents the first investigation into the effect of WC/W2C hard particles on the hot-forming process of additively manufactured Ni-based metal matrix composites.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"13 ","pages":"Article 100267"},"PeriodicalIF":4.2,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the damping and fatigue characterization of additively manufactured Ti-6Al-4V

IF 4.2

Additive manufacturing letters Pub Date : 2024-12-01 DOI: 10.1016/j.addlet.2024.100260

Peyton J. Wilson , Elaheh Azizian-Farsani , Mikyle Paul , Michael M. Khonsari , Shuai Shao , Nima Shamsaei

{"title":"On the damping and fatigue characterization of additively manufactured Ti-6Al-4V","authors":"Peyton J. Wilson , Elaheh Azizian-Farsani , Mikyle Paul , Michael M. Khonsari , Shuai Shao , Nima Shamsaei","doi":"10.1016/j.addlet.2024.100260","DOIUrl":"10.1016/j.addlet.2024.100260","url":null,"abstract":"<div><div>With the recent implementation of additively manufactured parts into industrial applications, there is a dire need for nondestructive evaluation methods to qualify if these components are fit for service due to their sensitivity to processing conditions. The Impulse Excitation Technique (IET) is applied to additively manufactured Ti-6Al-4V bending specimens to determine natural frequencies and damping properties in order to predict fatigue performance relative to specimens fabricated with different processing parameters. From the damping and natural frequency results, it was found that the specimens, fabricated with intentional underheating to induce lack of fusion defects, had the lowest damping value in the pristine condition and the highest natural frequency. For the three batches of specimens tested, it was determined that the underheated specimens had the best fully-reversed bending fatigue performance with the highest fatigue limit (297 MPa) and longest fatigue lives as compared to the other two batches, implying a relation of decreased fatigue life with increased material damping in the pristine condition. The theory of the IET related to materials is presented with damping and fatigue results, as well as microstructural analysis and fractography of three specimens batches fabricated with different processing parameters.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"11 ","pages":"Article 100260"},"PeriodicalIF":4.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molten metal jetting for repairing aluminum components

IF 4.2

Additive manufacturing letters Pub Date : 2024-12-01 DOI: 10.1016/j.addlet.2024.100259

Benedikt Kirchebner , Kellen D. Traxel , Alexander E. Wilson-Heid , Eric S. Elton , Andrew J. Pascall , Jason R. Jeffries

{"title":"Molten metal jetting for repairing aluminum components","authors":"Benedikt Kirchebner , Kellen D. Traxel , Alexander E. Wilson-Heid , Eric S. Elton , Andrew J. Pascall , Jason R. Jeffries","doi":"10.1016/j.addlet.2024.100259","DOIUrl":"10.1016/j.addlet.2024.100259","url":null,"abstract":"<div><div>Molten metal jetting (MMJ) is an additive manufacturing (AM) method where droplets of molten metal are used to build parts. Like most AM technologies, MMJ is typically used to build stand-alone parts rather than add onto existing parts. However, the droplet-wise deposition method of MMJ is inherently compatible with the ability to build on existing parts. Here, we utilize MMJ to “repair” machined damage on cast aluminum parts. A commercial MMJ system was used to fill in varied but defined groove geometries to find optimal shapes amenable to repair with MMJ. Subsequently, grooves were cut into tensile specimens and back-filled (repaired) using MMJ. Tensile tests indicate that MMJ repair restores significant strength to samples despite the distinct microstructure and void structures present in the repaired section. Repaired samples demonstrated tensile strengths ∼72 % of the as-received material, compared to UTS of ∼33 % for damaged samples. These results indicate that MMJ is a viable method to repair parts where other repair methods may be impractical.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"11 ","pages":"Article 100259"},"PeriodicalIF":4.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A spatial-temporal method for early prediction of fatigue crack region and orientation in metallic cellular materials using in-situ infrared thermography (IRT)

IF 4.2

Additive manufacturing letters Pub Date : 2024-12-01 DOI: 10.1016/j.addlet.2024.100258

Tyler D. Smith , Chad Westover , Matthew D'Souza , Shenghan Guo , Dhruv Bhate

引用次数: 0

A new process route for the additive manufacturing of a high nitrogen containing martensitic stainless steel - A feasibility study 高含氮马氏体不锈钢增材制造的新工艺路线 - 可行性研究

IF 4.2

Additive manufacturing letters Pub Date : 2024-11-19 DOI: 10.1016/j.addlet.2024.100257

L. Becker, P. König, J. Lentz, S. Weber

{"title":"A new process route for the additive manufacturing of a high nitrogen containing martensitic stainless steel - A feasibility study","authors":"L. Becker, P. König, J. Lentz, S. Weber","doi":"10.1016/j.addlet.2024.100257","DOIUrl":"10.1016/j.addlet.2024.100257","url":null,"abstract":"<div><div>High-nitrogen martensitic stainless steels, such as X30CrMoN15 (0.3 to 0.5 mass% nitrogen), exhibit an excellent combination of strength and corrosion resistance, making them well-suited for applications in the medical technology and aerospace industry. The qualification of these steels for additive manufacturing (AM) could generate new application areas where AM, due to its process-specific advantages, could offer added value compared to conventional manufacturing methods. However, the laser powder bed fusion (PBF-LB/M) of high-nitrogen alloyed steels is challenging due to the high tendency for gas pore formation, resulting from the limited nitrogen solubility in the steel melt. In this work, a new process route for AM of a high nitrogen containing X50CrMoV15 martensitic stainless steel is presented, which consists of a process combination of powder nitriding, PBF-LB/M and subsequent hot isostatic pressing (HIP) with integrated quenching. Gas nitriding is used to achieve a nitrogen content in the starting powder that exceeds the maximum solubility in the melt. Although the nitrogen content decreases during the PBF-LB/M process, the high solidification and cooling rates prevent the melt from reaching equilibrium nitrogen levels, resulting in a nitrogen content above the solubility limit in the final PBF-LB/M state. The pores formed during the process are closed through HIP, which also allows hardening via integrated gas quenching. With an additional cryogenic treatment, the process produces a fully dense steel with 75% martensitic structure and 0.246 mass% nitrogen. Further optimization opportunities have been identified and are discussed.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"11 ","pages":"Article 100257"},"PeriodicalIF":4.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Additive manufacturing simulations: An approach based on space partitioning and dynamic 3D mesh adaptation 快速成型制造模拟：基于空间分割和动态 3D 网格适应的方法

IF 4.2

Additive manufacturing letters Pub Date : 2024-11-18 DOI: 10.1016/j.addlet.2024.100256

Panagis Foteinopoulos, Alexios Papacharalampopoulos, Panagiotis Stavropoulos

引用次数: 0

Understanding the effect of pre-sintering scanning strategy on the relative density of Zr-modified Al7075 processed by laser powder bed fusion 了解预烧结扫描策略对激光粉末床熔融技术加工的 Zr 改性 Al7075 相对密度的影响

IF 4.2

Additive manufacturing letters Pub Date : 2024-11-13 DOI: 10.1016/j.addlet.2024.100253

Nicolas Nothomb , Ignacio Rodriguez-Barber , María Teresa Pérez-Prado , Norberto Jimenez Mena , Grzegorz Pyka , Aude Simar

引用次数: 0

Mechanical performance of laser powder bed fused Ti-6Al-4V: The influence of filter condition and part location 激光粉末床熔融 Ti-6Al-4V 的机械性能：过滤条件和零件位置的影响

IF 4.2

Additive manufacturing letters Pub Date : 2024-11-08 DOI: 10.1016/j.addlet.2024.100255

Mohammad Salman Yasin , Kevin Stonaker , Shuai Shao , Nima Shamsaei

{"title":"Mechanical performance of laser powder bed fused Ti-6Al-4V: The influence of filter condition and part location","authors":"Mohammad Salman Yasin , Kevin Stonaker , Shuai Shao , Nima Shamsaei","doi":"10.1016/j.addlet.2024.100255","DOIUrl":"10.1016/j.addlet.2024.100255","url":null,"abstract":"<div><div>Deteriorated filter condition in laser powder bed fusion (L-PBF) systems may negatively impact shield gas flow, causing inadequate spatter particle/plume removal, leading to laser beam attenuation and reduction in melt pool depth, and potentially causing more frequent formation of volumetric defects. This work investigated the effects of filter condition and part location on the micro-/defect-structure and mechanical behavior, including tensile and fatigue, of Ti-6Al-4V parts fabricated by L-PBF. Interestingly, within the manufacturer recommended service intervals, no specific effect of filter condition could be observed on the micro-/defect-structure or the mechanical behavior of the fabricated parts. However, the parts’ defect-structures were affected by their location, with ones located near the center of the build plate having less porosity than the ones located away. Although these defects did not affect the tensile properties, they frequently observed to initiate fatigue cracks (the critical defects sizes were often in the range of a few tens of micrometers). Therefore, their sensitivity to location resulted in the location dependence of the fatigue behavior.</div></div>","PeriodicalId":72068,"journal":{"name":"Additive manufacturing letters","volume":"11 ","pages":"Article 100255"},"PeriodicalIF":4.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0