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Powder Metallurgy最新文献

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Fritz Thümmler, Prof. Dr.-Ing. habil, 1924–2022
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2022-10-06 DOI: 10.1080/00325899.2022.2131144
R. Oberacker
{"title":"Fritz Thümmler, Prof. Dr.-Ing. habil, 1924–2022","authors":"R. Oberacker","doi":"10.1080/00325899.2022.2131144","DOIUrl":"https://doi.org/10.1080/00325899.2022.2131144","url":null,"abstract":"","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"65 1","pages":"353 - 353"},"PeriodicalIF":1.4,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41743921","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
Finite element simulation of different deformation modes for powder hot forging 粉末热锻不同变形模式的有限元模拟
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2022-08-30 DOI: 10.1080/00325899.2022.2116401
G. Bagliuk, S. Kyryliuk
{"title":"Finite element simulation of different deformation modes for powder hot forging","authors":"G. Bagliuk, S. Kyryliuk","doi":"10.1080/00325899.2022.2116401","DOIUrl":"https://doi.org/10.1080/00325899.2022.2116401","url":null,"abstract":"ABSTRACT Comparative results of numerical simulation of the process of hot forging of porous preforms with an axial hole for two deformation schemes are presented: in a die with a flash groove on the inner surface of the forged workpiece cavity and in a closed die. A significant difference in the nature of the evolution of the distribution of deformations and density over the cross-section of the workpiece for the two considered schemes is noted. It is shown that forging in a die with an open volume provides significantly higher degrees of material deformation during forging compared to closed forging, which should lead to an increase in the quality of the structure and final properties of the forged material.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"66 1","pages":"176 - 186"},"PeriodicalIF":1.4,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47386876","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
Study of mechanical and tribological properties of Ti–6Al–4V alloy fabricated by powder bed fusion laser beam 粉末床熔融激光束制备Ti–6Al–4V合金的力学和摩擦学性能研究
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2022-08-30 DOI: 10.1080/00325899.2022.2116405
Xiaojie Shi, Peipei Lu, Xiu Ye, Shuai Ren, Yiyao Wang, Zi-hua Xie, Yiqing Ma, Xiaojin Miao, Meiping Wu
{"title":"Study of mechanical and tribological properties of Ti–6Al–4V alloy fabricated by powder bed fusion laser beam","authors":"Xiaojie Shi, Peipei Lu, Xiu Ye, Shuai Ren, Yiyao Wang, Zi-hua Xie, Yiqing Ma, Xiaojin Miao, Meiping Wu","doi":"10.1080/00325899.2022.2116405","DOIUrl":"https://doi.org/10.1080/00325899.2022.2116405","url":null,"abstract":"ABSTRACT Powder bed fusion laser beam, as one of the most promising forming technologies, offers unmatched benefits over traditional processing, particularly in the production of Ti–6Al–4V. The influence of laser line energy density (LLED) on the forming surface, phase composition, micro-hardness, tensile characteristics and wear resistance of Ti–6Al–4V alloy were explored to disclose the evolution of mechanical and tribological properties. According to the findings, the LLED causes ‘depressions’ and ‘highlands’ between nearby scanning tracks. The phase composition did not alter appreciably as LLED increased. Micro-hardness and tensile characteristics increased initially, then declined, and the value of maximum micro-hardness and ultimate tensile strength were 388.17 HV0.2 and 1197.5 MPa, respectively. Furthermore, when the LLED is 0.24 J mm–1, the wear resistance is optimal under the aviation lubricant medium, with an average friction coefficient of 0.1505 and volume wear rate of 6.95∗10−8 mm2∗N−1, and a wear mechanism of mild furrow wear and adhesion wear.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"66 1","pages":"116 - 128"},"PeriodicalIF":1.4,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49281926","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: 1
Effect of reuse times on H13 powder properties processed by selective electron beam melting 重复使用次数对选择性电子束熔炼H13粉末性能的影响
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2022-08-25 DOI: 10.1080/00325899.2022.2115758
Xin Yang, Chenhao Sun, Fenghui Wang, Yang-lan Lai, S. Liu, Yingkang Wei, J. Yang, Hui-ping Tang
{"title":"Effect of reuse times on H13 powder properties processed by selective electron beam melting","authors":"Xin Yang, Chenhao Sun, Fenghui Wang, Yang-lan Lai, S. Liu, Yingkang Wei, J. Yang, Hui-ping Tang","doi":"10.1080/00325899.2022.2115758","DOIUrl":"https://doi.org/10.1080/00325899.2022.2115758","url":null,"abstract":"ABSTRACT The inconsistency of high material cost and powder properties are the primary barriers to widespread adoption of metal additive manufacturing. Obviously, powder reuse without affecting the properties of the parts can reduce the cost burden. In this study, the properties of H13 (4Cr5MoSiV1) powder were evaluated 16 build cycles in selective electron beam melting. Results show that the crystal plane spacing and particle size of the powder increased with reuse. With the increase i reuse times, more irregular particles appeared and the flowability decreased. The oxygen and nitrogen content of powder gradually increases from 149 to 250 ppm and 237 ppm to 394 ppm, respectively, with reuse. The simulation results show that the wider particle size distribution, the better the relative packing performance of the powder layer. Powder reuse has no negative effect on the hardness of the as-built samples.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"66 1","pages":"107 - 115"},"PeriodicalIF":1.4,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46089485","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: 1
Induction of p27 contributes to inhibitory effect of isorhapontigenin (ISO) on malignant transformation of human urothelial cells. p27 的诱导有助于抑制异黄酮甙元（ISO）对人尿道细胞恶性转化的影响。
IF 1.6 4区 材料科学
Powder Metallurgy Pub Date : 2022-07-31 Epub Date: 2022-05-15 DOI: 10.1080/15384101.2022.2074623
Maowen Huang, Xiaohui Hua, Jiheng Xu, Zhongxian Tian, Jiajing Wang, Hengchao Chen, Xuyao Wang, Peng Shu, Hongyan Ye, Jianfeng Shu, Chuanshu Huang
{"title":"Induction of p27 contributes to inhibitory effect of isorhapontigenin (ISO) on malignant transformation of human urothelial cells.","authors":"Maowen Huang, Xiaohui Hua, Jiheng Xu, Zhongxian Tian, Jiajing Wang, Hengchao Chen, Xuyao Wang, Peng Shu, Hongyan Ye, Jianfeng Shu, Chuanshu Huang","doi":"10.1080/15384101.2022.2074623","DOIUrl":"10.1080/15384101.2022.2074623","url":null,"abstract":"<p><p>Bladder cancer (BC) is the most expensive cancer to manage on a per-patient basis, costing about $4 billion in total healthcare expenditure per annum in America alone. Therefore, identifying a natural compound for prevention of BC is of tremendous importance for managing this disease. Previous studies have identified isorhapontigenin (ISO) as having an 85% preventive effect against invasive BC formation induced by N-butyl-N-(4-hydroxybutyl) nitrosamine (BBN). The results showed here that ISO treatment inhibited EGF-induced cell transformation of human urothelial cells through induction of tumor suppressor p27 transcription secondary to activation of an E2F1-dependentpathway.ISOtreatmentrenderedcellsresistanttoEGF-induced anchorage-independent growth concurrent with p27 protein induction in both UROtsa and SV-HUC-1 cells. ISO inhibition of EGF-induced cell transformation could be completely reversed by knockdown of p27, indicating that this protein was essential for the noted ISO inhibitory action. Mechanistic studies revealed that ISO treatment resulted in increased expression of E2F1, which in turn bound to its binding site in p27 promoter and initiated p27 transcription. The E2F1 induction was due to the elevation of its translation caused by ISO-induced miR-205 downregulation. Consistently, miR-205 was found to be overexpressed in human BCs, and ectopic expression of miR-205 mitigated ISO inhibitory effects against EGF-induced outcomes. Collectively, the results here demonstrate that ISO exhibits its preventive effect on EGF-induced human urothelial cell transformation by induction of p27 through a miR-205/E2F1 axis. This is distinct from what has been described for the therapeutic effects of ISO on human BC cells.</p>","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"25 1","pages":"1-14"},"PeriodicalIF":1.6,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13614042/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87675996","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
Investigation of mechanical properties and microstructure of Ti-15% Mo alloy produced by mechanical alloying and sintering with SPS (MA-SPS) SPS（MA-SPS）烧结Ti-15%Mo合金的力学性能和微观组织研究
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2022-07-22 DOI: 10.1080/00325899.2022.2102839
Mahdi Mirzaaghaei, F. Qods, H. Arabi, M. Milani, B. Mohammad Sadeghi, M. Nourbakhsh
{"title":"Investigation of mechanical properties and microstructure of Ti-15% Mo alloy produced by mechanical alloying and sintering with SPS (MA-SPS)","authors":"Mahdi Mirzaaghaei, F. Qods, H. Arabi, M. Milani, B. Mohammad Sadeghi, M. Nourbakhsh","doi":"10.1080/00325899.2022.2102839","DOIUrl":"https://doi.org/10.1080/00325899.2022.2102839","url":null,"abstract":"ABSTRACT The goal of this study was to investigate the mechanical properties and microstructure of Ti-15% Mo alloy fabricated using the mechanical alloying and spark plasma sintering (MA-SPS) method. Accordingly, Ti and Mo powders were milled for different times, including 5, 15, 25, 35, and 45 h, and the SPS technique for sintering under a pressure of 25 MPa at 1100°C was used. The X-ray diffraction (XRD) analysis, optical and electron microscopy (SEM), hardness measurements, and compression testing were used to study the phases formed, the morphology of powders, microstructure, and mechanical properties of the as-prepared samples, respectively. The results revealed that owing to increasing the mechanical milling time, the percentage of the beta phase formed was higher, and in addition, it influenced the microstructure and mechanical properties of the samples fabricated after the sintering process. GRAPHICAL ABSTRACT","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"66 1","pages":"139 - 150"},"PeriodicalIF":1.4,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42151702","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: 2
Binder-jetting of TiCN-based cermets TiCN基金属陶瓷的粘结剂喷射
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2022-07-19 DOI: 10.1080/00325899.2022.2099636
Christian Berger, J. Pötschke, M. Fries, T. Moritz, A. Michaelis
{"title":"Binder-jetting of TiCN-based cermets","authors":"Christian Berger, J. Pötschke, M. Fries, T. Moritz, A. Michaelis","doi":"10.1080/00325899.2022.2099636","DOIUrl":"https://doi.org/10.1080/00325899.2022.2099636","url":null,"abstract":"ABSTRACT Additive Manufacturing is experiencing an upswing in many sectors of industry for a broad variety of materials. Processes are mainly developed for polymers and metals. For ceramics, hardmetals and especially cermets there are only a few additive processes suitable. The powder-based technique Binder-Jetting is one of these suitable processes with high productivity and relatively low green density. Within this study, TiCN-based cermets are printed by Binder-Jetting for the first time. The complexity of influences of the morphology and composition of cermet powders are discussed in regard to bulk density and material properties of printed and sintered parts. Studied TiCN-based cermet compositions represent different Ni and Mo2C contents. Main points of this investigation are further the adjustment of ratio of the raw materials for good sintering behaviour and their influence on the microstructures and as a function of varied sintering temperatures.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"65 1","pages":"382 - 389"},"PeriodicalIF":1.4,"publicationDate":"2022-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48883365","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: 3
Crack initiation and early propagation in case hardened sintered PM steels under cyclic load 循环载荷作用下表面硬化烧结PM钢的裂纹萌生和早期扩展
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2022-07-12 DOI: 10.1080/00325899.2022.2096194
A. Holmberg, U. Wiklund, P. Isaksson, Å. Kassman Rudolphi
{"title":"Crack initiation and early propagation in case hardened sintered PM steels under cyclic load","authors":"A. Holmberg, U. Wiklund, P. Isaksson, Å. Kassman Rudolphi","doi":"10.1080/00325899.2022.2096194","DOIUrl":"https://doi.org/10.1080/00325899.2022.2096194","url":null,"abstract":"ABSTRACT In the present study, crack propagation through the case hardened region of two different PM steels manufactured with different powder size distributions and sintered at different temperatures has been investigated. EBSD was used to study the microstructure before and after case hardening, revealing the relationship between powder particle grains after sintering and prior austenite grains after case hardening. A novel approach was used to achieve short cracks (10–20 µm) with high repeatability. The cracks were then analysed using EBSD and SEM, revealing detailed and novel information about the crack propagation route in the materials. Both tested materials show the same crack propagation behaviour. If a prior grain/prior austenite boundary is present within an angle from the crack initiation site, the cracks will follow the boundary and thus propagate intergranular, suggesting that the preferred route of crack propagation in case hardened sintered steel is along these boundaries.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"66 1","pages":"164 - 175"},"PeriodicalIF":1.4,"publicationDate":"2022-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41597611","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
Research priorities for the surgical care of patients taking opioids preoperatively. 术前服用阿片类药物患者的手术护理研究重点。
4区 材料科学
Powder Metallurgy Pub Date : 2022-06-17 DOI: 10.1136/rapm-2022-103584
Jayson S Marwaha, Brendin R Beaulieu-Jones, Chris J Kennedy, Mark C Bicket, Gabriel A Brat
{"title":"Research priorities for the surgical care of patients taking opioids preoperatively.","authors":"Jayson S Marwaha, Brendin R Beaulieu-Jones, Chris J Kennedy, Mark C Bicket, Gabriel A Brat","doi":"10.1136/rapm-2022-103584","DOIUrl":"10.1136/rapm-2022-103584","url":null,"abstract":"","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91048708","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
Growth inhibiting during ultra-high temperature sintering of injection moulded 17-4 PH stainless steel through the dispersion of ZrO2 particle as a thermal stabiliser 通过分散ZrO2颗粒作为热稳定剂在注射成型17-4PH不锈钢的超高温烧结过程中抑制生长
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2022-05-31 DOI: 10.1080/00325899.2022.2069076
Masoud Moradjoy, H. Khorsand
{"title":"Growth inhibiting during ultra-high temperature sintering of injection moulded 17-4 PH stainless steel through the dispersion of ZrO2 particle as a thermal stabiliser","authors":"Masoud Moradjoy, H. Khorsand","doi":"10.1080/00325899.2022.2069076","DOIUrl":"https://doi.org/10.1080/00325899.2022.2069076","url":null,"abstract":"ABSTRACT The present work deals with the metal injection moulding and ultra-high temperature sintering of 17-4 PH powder. Purposefully, 5 mass% ZrO2 particles were dispersed by applying high shear stress during feedstock preparation. Uniformly distributed particles effectively hindered the powder boundary migration and limited their growth during ultra-high sintering temperatures. The achieved thermal stability provided a proper condition for reducing the final porosity to 3% and significantly improved the ultimate strength to 1070 MPa after sintering at 1380°C. Also, the ZrO2 particles acted as facilitators of sliding between solid powders and substantially reduced the required pressure for injecting to 700 Bar. Through introducing such a new approach in the field of powder injection moulding by ZrO2 particles, the amount of anisotropic shrinkage was reduced to 2%.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"66 1","pages":"20 - 28"},"PeriodicalIF":1.4,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43429300","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
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