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Consolidation and properties of porous Cu–Al–Ni shape memory alloys manufactured by powder metallurgy 粉末冶金制备多孔Cu-Al-Ni形状记忆合金的固结和性能
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-06-23 DOI: 10.1080/00325899.2023.2226944
A. P. Gómez, G. Urretavizcaya, A. Baruj, M. T. Malachevsky
{"title":"Consolidation and properties of porous Cu–Al–Ni shape memory alloys manufactured by powder metallurgy","authors":"A. P. Gómez, G. Urretavizcaya, A. Baruj, M. T. Malachevsky","doi":"10.1080/00325899.2023.2226944","DOIUrl":"https://doi.org/10.1080/00325899.2023.2226944","url":null,"abstract":"ABSTRACT A method to manufacture a porous Cu–Al–Ni shape memory alloy by powder metallurgy using space holders is presented. Two aluminium powders with different particle morphologies were employed to investigate their influence on phase formation, microstructure and mechanical properties. The variation of the relative amount of space holders in the mixture allows to obtain different porosities. Samples prepared with irregular-shaped aluminium powder include both 18R and 2H martensitic phases and exhibit the shape memory effect and pseudoelastic behaviour under uniaxial compression tests. In contrast, the samples made with aluminium flakes present the α phase accompanying the 18R martensitic phase, and do not exhibit the shape memory effect. Both the aluminium flakes flat shape and the higher proportion of aluminium oxide associated with its larger surface area to volume ratio hindered the interdiffusion of the metals, resulting in an aluminium-depleted martensitic phase surrounded by an aluminium oxide-rich layered structure.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42155860","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
Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy 粉末冶金法制备bcc基高熵合金纳米力学特性与相变的关系
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-06-21 DOI: 10.1080/00325899.2023.2225284
Hansung Lee, Ashutosh Sharma, Minsu Kim, B. Ahn
{"title":"Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy","authors":"Hansung Lee, Ashutosh Sharma, Minsu Kim, B. Ahn","doi":"10.1080/00325899.2023.2225284","DOIUrl":"https://doi.org/10.1080/00325899.2023.2225284","url":null,"abstract":"ABSTRACT In this study, the effects of Cu addition on AlFeMnTiSi0.75Cu x (x = 0, 0.25, 0.5, 0.75, 1.00; in molar ratios) high entropy alloys (HEAs) prepared via mechanical alloying and spark plasma sintering were investigated. The structure, phase, morphology and composition of HEA powders were analysed and the results revealed that the AlFeMnTiSi0.75Cu x HEAs exhibited a multiphase structure. Additionally, after sintering at 900 °C, the formation of BCC, µ and L21 phases in the densified HEAs was enhanced. The investigation of the hardness, nanoindentation and compressive properties revealed that the microstructural and mechanical properties of AlFeMnTiSi0.75Cu x HEAs were improved at the optimal Cu fraction (0.25 molar ratio). The nanoindentation results revealed that the AlFeMnTiSi0.75Cu x HEAs exhibited the highest hardness and elastic modulus (HIT = 19.2 GPa, EIT = 336 GPa). These results improve the current understanding of multiphase HEAs and may pave way for the development of advanced HEAs with superior mechanical properties.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42611270","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
Powder flowability characterisation at preheating temperature in additive manufacturing 增材制造中预热温度下粉末流动性的表征
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-06-20 DOI: 10.1080/00325899.2023.2225953
Jiangtao Zhang, Peng Liu
{"title":"Powder flowability characterisation at preheating temperature in additive manufacturing","authors":"Jiangtao Zhang, Peng Liu","doi":"10.1080/00325899.2023.2225953","DOIUrl":"https://doi.org/10.1080/00325899.2023.2225953","url":null,"abstract":"ABSTRACT The powder spreading process is usually performed at preheating temperature in powder-bed-based additive manufacturing (AM). Thus, the powder flowability characterisation at preheating temperature is important for powder spreading processes. However, devices for traditional powder flowability characterising methods are mainly designed for specific conditions at room temperature and cannot consider the effect of temperature on powder flowability. In this work, an experimental platform with a heated rotating drum was set up and a high-speed camera was used to record powder avalanche processes in a heated rotating drum for the powder flowability characterisation at preheating temperature. Nylon and stainless steel powder flowability at different temperatures was assessed by the statistical analysis of avalanche angle, avalanche time, arithmetic mean deviation and surface linearity of powder surface profile. Four parameters provide a good characterisation of powder flowability. The results can provide guidance for the powder flowability characterisation method at preheating temperature in AM.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47894205","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
Effects of B addition on microstructure and thermal conductivity of Cu–B composites produced by hot-extrusion of elemental powders 添加B对元素粉末热挤压制备Cu-B复合材料微观结构和导热性能的影响
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-06-18 DOI: 10.1080/00325899.2023.2223794
Y. Chun, Seunghyeok Chung, C. Rhee, H. Ryu
{"title":"Effects of B addition on microstructure and thermal conductivity of Cu–B composites produced by hot-extrusion of elemental powders","authors":"Y. Chun, Seunghyeok Chung, C. Rhee, H. Ryu","doi":"10.1080/00325899.2023.2223794","DOIUrl":"https://doi.org/10.1080/00325899.2023.2223794","url":null,"abstract":"ABSTRACT This work proposes a new neutron absorber, Cu–B composites, with excellent thermal conductivity and good neutron absorbing capability. Mixtures of elemental Cu and B powders with the B contents varying between 10 and 40 at.-% were consolidated into round bars by hot extrusion. The addition of B significantly refined the grain structure, which is related to the suppression of dynamic recrystallisation during hot extrusion and extended recovery during subsequent annealing. Such fine-grained structure in Cu–B composites together with dispersion hardening by B particles contributed to the higher hardness of Cu–B composites. The thermal conductivity of Cu–B composites, being roughly two times higher than that of Al–B4C MMC, decreases with increasing the B contents, which is mainly due to higher volume fraction B particles with lower thermal conductivity, and partly to texture randomisation and refined grain structure in the Cu–B composites.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43243424","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
Surface morphology transformation and densification behaviour of conventionally sintered AlFeCoNiSi high entropy alloys 常规烧结AlFeCoNiSi高熵合金的表面形貌转变和致密化行为
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-06-16 DOI: 10.1080/00325899.2023.2223019
S. Dewangan, C. Nagarjuna, Hansung Lee, Ashutosh Sharma, B. Ahn
{"title":"Surface morphology transformation and densification behaviour of conventionally sintered AlFeCoNiSi high entropy alloys","authors":"S. Dewangan, C. Nagarjuna, Hansung Lee, Ashutosh Sharma, B. Ahn","doi":"10.1080/00325899.2023.2223019","DOIUrl":"https://doi.org/10.1080/00325899.2023.2223019","url":null,"abstract":"ABSTRACT A preliminary study has been performed to understand the effect of pressureless sintering on the surface morphology of the AlFeCoNi alloy by the addition of the Si element. This study aims to determine the possibility of achieving the densification of high entropy alloy using the conventional sintering technique. The results indicate that the HEAs have a single-phase BCC structure even with the addition of Si. The thermodynamic simulation (CALPHAD) was used to predict the phase formation. The variation of crystallite sizes and lattice strains caused by sintering temperatures was also discussed. In addition, densification mechanisms occurring with the different sintering temperatures have been discussed. The formation of porosity was observed, however, the density of HEAs improved with increasing sintering temperature. Ultimately, it was suggested that the present HEAs required higher sintering temperatures and a longer time to achieve high density.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44395023","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: 4
Effects of process parameters on the spreading morphology of disc surface and aluminium powder produced by centrifugal atomisation 工艺参数对圆盘表面及离心雾化铝粉扩散形态的影响
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-06-15 DOI: 10.1080/00325899.2023.2223015
Long Li, Lei Peng, Wei Zhao
{"title":"Effects of process parameters on the spreading morphology of disc surface and aluminium powder produced by centrifugal atomisation","authors":"Long Li, Lei Peng, Wei Zhao","doi":"10.1080/00325899.2023.2223015","DOIUrl":"https://doi.org/10.1080/00325899.2023.2223015","url":null,"abstract":"ABSTRACT An apparatus was developed to study the effects of operating parameters on liquid spreading and particle size in centrifugal atomisation. Different areas of aluminium spreading on the surface of the rotary disc were observed, in which the diameter of the ‘Plane area’ showed a linear relationship with the rotational speed. The microscopic morphology of the aluminium powder samples was analysed by scanning electron microscopy (SEM). The variation of particle size distribution curve with rotational speed was explored, and the shape of the curve was changed from ‘Single-peak’ to ‘Double-peak’ when the rotating speed increased to a certain value. The effect of the fragmentation mode on the particle size distribution and median diameter was analysed. The variation of the median diameter of the powder with the rotating speed was obtained. The effect of different disc configurations on the particle size was obtained.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45574174","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
Miniaturised test-setup for Spark Plasma Sintering – experimental and numerical investigations 火花等离子体烧结的小型试验装置——实验和数值研究
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-06-13 DOI: 10.1080/00325899.2023.2219511
M. Nöthe, J. Trapp, A. Semenov, B. Kieback, T. Wallmersperger
{"title":"Miniaturised test-setup for Spark Plasma Sintering – experimental and numerical investigations","authors":"M. Nöthe, J. Trapp, A. Semenov, B. Kieback, T. Wallmersperger","doi":"10.1080/00325899.2023.2219511","DOIUrl":"https://doi.org/10.1080/00325899.2023.2219511","url":null,"abstract":"ABSTRACT Spark Plasma Sintering (SPS) is an innovative sintering technique, whereby many of the beneficial effects of this process on sintering are still elusive. To allow for the detailed investigations of the SPS process, a custom experimental set-up and a corresponding finite element (FE) model was developed. The miniaturised setup allows for very high current intensities, custom pulse patterns, a wide pressure range and dilatometric measurements. The FE model was employed to calculate the temperature field in the set-up and the sintering specimen itself. A very good correlation of the temperature, current and voltage over the entire process was observed. Our investigations show that the contact conductivities have a significant impact on the process temperature. Also, the imperfect contacts at the interfaces between the graphite foil and the real specimen may lead to a significant variance of the currents necessary to obtain the desired sintering temperature.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41478573","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
Mechanical and thermal expansion behaviour of TiC-reinforced CoCrFeMnNi high entropy alloy prepared by mechanical alloying and spark plasma sintering 机械合金化和放电等离子烧结制备tic增强CoCrFeMnNi高熵合金的力学和热膨胀行为
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-06-06 DOI: 10.1080/00325899.2023.2219145
C. Nagarjuna, S. Dewangan, Kwan Lee, B. Ahn
{"title":"Mechanical and thermal expansion behaviour of TiC-reinforced CoCrFeMnNi high entropy alloy prepared by mechanical alloying and spark plasma sintering","authors":"C. Nagarjuna, S. Dewangan, Kwan Lee, B. Ahn","doi":"10.1080/00325899.2023.2219145","DOIUrl":"https://doi.org/10.1080/00325899.2023.2219145","url":null,"abstract":"ABSTRACT In this study, TiC-reinforced CoCrFeMnNi high-entropy alloy (HEA) composites were prepared by mechanical alloying (MA) and spark plasma sintering (SPS). The phase composition, microstructure, mechanical and thermal expansion behaviour of composite HEAs were investigated. The results reveal that the addition of TiC has no effect on the crystal structure, however, the microstructure and mechanical properties show a strong dependency on the TiC content. Compared to the original HEA, the composite HEA shows decreased grain size, resulting in TiC nanoparticles (NPs) retarding grain growth by pinning the grain boundaries. With increasing TiC content from 0 to 4 wt-%, significant increases in the hardness from 410 to 480 HV and compressive yield strength from 680 to 1100 MPa, which is mainly due to the grain boundary and dispersion strengthening effects. Moreover, the thermal expansion curves show linear increments up to 800°C and decrease with increasing TiC content.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44942290","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
Mold filling behaviour of LPIM feedstocks using numerical simulations and real-scale injections 采用数值模拟和实际注射的LPIM原料充型行为
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-06-02 DOI: 10.1080/00325899.2023.2218678
Foad Haghniaz, D. Delbergue, Raphaël Côté, V. Demers
{"title":"Mold filling behaviour of LPIM feedstocks using numerical simulations and real-scale injections","authors":"Foad Haghniaz, D. Delbergue, Raphaël Côté, V. Demers","doi":"10.1080/00325899.2023.2218678","DOIUrl":"https://doi.org/10.1080/00325899.2023.2218678","url":null,"abstract":"ABSTRACT This study aims to compare the flow patterns and in-cavity pressures obtained experimentally and numerically for different conditions. Four feedstocks based on 17-4PH stainless steel powder were fully characterised and implemented as material laws in an Autodesk Moldflow package before to obtain numerical simulations that were then validated using real-scale injections. The flow patterns obtained numerically for the different flat bar mold geometries were in good agreement with the experimental flow patterns, showing an almost perfect fit, whereas for the flow patterns of the complex mold geometry, there were some minor discrepancies. The simulated pressure profiles obtained for different mold geometries, feedstock temperatures, mold temperatures and solid loadings were in good agreement with the experimental pressure profiles in terms of trend and pressure values, with maximum relative differences varying from 30 to 64% depending on particular feedstocks and process parameters.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44793200","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
Cracking susceptibility of maraging parts manufactured by laser powder bed fusion additive manufacturing: study on the powder characteristics and baseplate preheating influence 激光粉末床熔融增材制造马氏体时效件的开裂敏感性:粉末特性及底板预热影响研究
IF 1.4 4区 材料科学
Powder Metallurgy Pub Date : 2023-05-28 DOI: 10.1080/00325899.2023.2213006
E. Gil, A. Mancisidor, A. Iturrioz, F. Garciandía, M. San Sebastian
{"title":"Cracking susceptibility of maraging parts manufactured by laser powder bed fusion additive manufacturing: study on the powder characteristics and baseplate preheating influence","authors":"E. Gil, A. Mancisidor, A. Iturrioz, F. Garciandía, M. San Sebastian","doi":"10.1080/00325899.2023.2213006","DOIUrl":"https://doi.org/10.1080/00325899.2023.2213006","url":null,"abstract":"ABSTRACT Maraging steel 300 processed by laser powder bed fusion (PBF-LB/M) is widely used for manufacturing inserts and moulds with conformal cooling channels. For such applications, high fracture toughness and strength are required to withstand thermal fatigue and any defect like pores, lack of fusion and cracks should be avoided so that the durability of the mould is not reduced. Maraging steel is prone to be cracked due to thermal gradients which arise during PBF-LB/M. Moreover, it was recently observed that slight variations in composition led to the crack’s presence, which implied lower mechanical properties. In this study, two powder batches, from the same powder producer, were employed with the same processing parameters. The effect of small changes in minor elements composition of the powder batch on cracking was studied and the preheating temperature was varied to significantly reduce the crack density. The presence of cracks significantly reduced the ductility of the parts.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43842739","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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