Materials Science and Engineering: A最新文献

Effect of laser surface treatment on microstructural evolution and mechanical properties of a Co–Cr–Fe–Ni–Mo medium–entropy alloy

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-30 DOI: 10.1016/j.msea.2024.147617

Chan Woo Jung , Jae Hyuk Lee , Soo-Hyun Joo , Rae Eon Kim , Hyoung Seop Kim , Jongun Moon

{"title":"Effect of laser surface treatment on microstructural evolution and mechanical properties of a Co–Cr–Fe–Ni–Mo medium–entropy alloy","authors":"Chan Woo Jung , Jae Hyuk Lee , Soo-Hyun Joo , Rae Eon Kim , Hyoung Seop Kim , Jongun Moon","doi":"10.1016/j.msea.2024.147617","DOIUrl":"10.1016/j.msea.2024.147617","url":null,"abstract":"<div><div>In this study, we explored the influence of laser surface treatment on the microstructural evolution and mechanical properties of a Co<sub>17.5</sub>Cr<sub>12.5</sub>Fe<sub>55</sub>Ni<sub>10</sub>Mo<sub>5</sub> medium-entropy alloy. After laser scanning on the cold-rolled alloy, a heterogeneous microstructure with Mo-rich μ-precipitates formed along the depth from the surface. Notably, laser processing parameters, including scanning speed and the number of scans, affected the macroscopic heterogeneity in the microstructure of the alloy, such as the thickness of the columnar, recrystallized, partially-recrystallized, and non-recrystallized layers. Furthermore, the microstructural features of the laser-treated alloys with a heterogeneous distribution of grains, cellular structures, and precipitates, contributed to the mechanical response of the alloys. As the heat input from the laser heat source increases, the grain coarsening and the absence of non-recrystallized layer have a greater impact on the strength of the laser-treated alloys, even if the precipitates distributed deeper from the surface. These microstructural modifications through laser surface treatment are linked to variations in the mechanical performance of the alloys, indicating that it can be an effective method to tailor the mechanical properties of structural materials.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"922 ","pages":"Article 147617"},"PeriodicalIF":6.1,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

In-situ dual force: A novel pathway to improving the mechanical properties of resistance spot welds

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-29 DOI: 10.1016/j.msea.2024.147619

Olakunle Timothy Betiku , Ali Ghatei-Kalashami , Hassan Ghassemi-Armaki , Elliot Biro

{"title":"In-situ dual force: A novel pathway to improving the mechanical properties of resistance spot welds","authors":"Olakunle Timothy Betiku , Ali Ghatei-Kalashami , Hassan Ghassemi-Armaki , Elliot Biro","doi":"10.1016/j.msea.2024.147619","DOIUrl":"10.1016/j.msea.2024.147619","url":null,"abstract":"<div><div>Although in-situ post-weld heat treatment (PWHT) has been a viable method to modify resistance spot weld microstructure and improve joint mechanical properties, prevailing methodologies only employ post-weld current to initiate microstructural transformations. This study uses in-situ dual force (DF) and a PWHT current pulse to induce microstructural changes specifically at the edge of the fusion zone (FZ), a region prone to crack propagation. After a short cooling period following the welding cycle, the application of strain energy from the DF and thermal energy from the PWHT current resulted in the formation of new equiaxed grains via austenite recrystallization. The energy absorption capability of the weld improved by 39 % after the DF schedule and 85 % when DF was combined with a PWHT current. The changes in mechanical properties resulted from strain hardening induced by the DF schedule, while grain refinement from the combined DF and PWHT current schedule led to the deviation of cracks at the edge of the FZ. In contrast, the crack propagated directly into the FZ along the columnar structure in the as-welded condition. The novel application of in-situ DF extends beyond the conventional PWHT and offers a promising avenue to trigger microstructural changes in the weld which can improve mechanical performance and overall crashworthiness.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"921 ","pages":"Article 147619"},"PeriodicalIF":6.1,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Laser powder bed fusion of a composition-modified IN738 alloy based on thermodynamic calculations

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-29 DOI: 10.1016/j.msea.2024.147605

Defan Wu , Quanquan Han , Meng Wu , Han Zhang , Yi Wang , Kaiju Lu , Haiyang Fan , Rossitza Setchi

{"title":"Laser powder bed fusion of a composition-modified IN738 alloy based on thermodynamic calculations","authors":"Defan Wu , Quanquan Han , Meng Wu , Han Zhang , Yi Wang , Kaiju Lu , Haiyang Fan , Rossitza Setchi","doi":"10.1016/j.msea.2024.147605","DOIUrl":"10.1016/j.msea.2024.147605","url":null,"abstract":"<div><div>Defects, particularly cracking defects, severely limit the application of Ni-based alloys fabricated via the laser powder bed fusion (LPBF) additive manufacturing process. To address the processability/strength trade-off, in this study a new Ni-based alloy (IN738M) was designed via thermodynamic calculations based on the traditional IN738 alloy. The processability, microstructure, phase precipitation behaviour and mechanical properties were systematically examined. The results demonstrate that the LPBF-fabricated IN738M exhibited excellent LPBF processability, achieving crack-free fabrication even with a high γ′ phase mass fraction. The compositional modifications led to improvements in the microstructure, including the formation of a quasi-continuous carbide network at the interdendritic regions, altered grain orientation and grain refinement. This study also proposes a heat treatment strategy to achieve a bimodal distribution of the γ′ phases for IN738M; the cellular structure was eliminated, with numerous MC-type carbides observed within grains and at the grain boundaries. The IN738M alloy exhibited a superior combination of ultimate tensile strength values (1462 ± 23 MPa) and elongation values (10.2 ± 0.4 %) at room temperature compared to the IN738 alloy (932 ± 35 MPa and 2.6 ± 0.3 %, respectively). These findings will provide valuable guidance for developing Ni-based alloys with enhanced LPBF processability and mechanical properties.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"922 ","pages":"Article 147605"},"PeriodicalIF":6.1,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effect of purity on the tensile mechanical behavior of pure iron

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-28 DOI: 10.1016/j.msea.2024.147616

Shujiao Deng , Wei Peng , Jiaxin Bai , Han Dong

{"title":"Effect of purity on the tensile mechanical behavior of pure iron","authors":"Shujiao Deng , Wei Peng , Jiaxin Bai , Han Dong","doi":"10.1016/j.msea.2024.147616","DOIUrl":"10.1016/j.msea.2024.147616","url":null,"abstract":"<div><div>The current work systematically investigated the microstructures, mechanical properties, textures, dislocation density and dislocation substructures of 3N2, 4N2 and 5N2 pure irons (3N2, 4N2 and 5N2 pure irons represent that the content of Fe are 99.9264 wt%, 99.9925 wt% and 99.9992 wt%, respectively) using SEM, EBSD, XRD and TEM. The results indicated that the recrystallization temperature decreased with increasing purity, and higher purity accelerated grain growth. 4N2 and 5N2 pure irons both presented equiaxed ferrite grains, while the microstructure of 3N2 pure iron was consisted of irregular polygonal ferrites and equiaxed ferrite grains. Low-density LAGBs were observed in annealed pure irons. The fraction of LAGBs increased significantly after deformation, and the LAGBs density decreased as the purity increased. The dislocation substructures of 3N2 and 4N2 pure irons were dominated by sub-grain boundaries with high dislocation densities and dislocation tangles, whilst 5N2 pure iron primarily consisted of fewer sub-grain boundaries and random dislocations. Work hardening was the primary strengthening contribution of pure irons. As the purity decreased, the capacity of work hardening increased, which resulted from the effective obstacles to dislocations by higher fraction of LAGBs, sub-grain boundaries with high dislocation densities and dislocation tangles. Therefore, the improved mechanical properties may be attributed to the increase of work hardening ability with the decrease of purity. 3N2 pure iron presented discontinuous yielding behavior, while 4N2 and 5N2 pure irons exhibited continuous yielding behaviors. The continuous yielding was attributed to the minimal interstitial atoms rarely segregated on mobile dislocations to form Cottrell atmosphere.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"922 ","pages":"Article 147616"},"PeriodicalIF":6.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Crack inhibition of non-weldable Inconel 738 alloy in ultrasound-assisted laser directed energy deposition

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-28 DOI: 10.1016/j.msea.2024.147607

Ziyu Tian , Yi Zheng , Haodong Wang , Shuai Wang , Junmei Chen , Huabin Chen , Chun Yu , Jijin Xu , Hao Lu

{"title":"Crack inhibition of non-weldable Inconel 738 alloy in ultrasound-assisted laser directed energy deposition","authors":"Ziyu Tian , Yi Zheng , Haodong Wang , Shuai Wang , Junmei Chen , Huabin Chen , Chun Yu , Jijin Xu , Hao Lu","doi":"10.1016/j.msea.2024.147607","DOIUrl":"10.1016/j.msea.2024.147607","url":null,"abstract":"<div><div>High crack susceptibility restricts reliable laser directed energy deposition (L-DED) and repair of γ′ precipitation-strengthened Nickel-based superalloy Inconel 738. This study investigates the effects of ultrasonic assistance synergized with reduced heat input on microstructures and mechanical properties of the L-DED Inconel 738 alloy. The mechanisms of inhibiting crack initiation and propagation of are studied. Results demonstrate that grain refinement and suppression of epitaxial growth of L-DED Inconel 738 alloy are achieved by ultrasonic assistance. The microstructures evolve from coarse columnar grains (∼82.6 μm) to a bimodal structure of shorter columnar and finer equiaxed grains (∼40 μm). The morphologies of MC carbides transform from a continuous distribution of larger sizes to a discrete distribution of finer sizes. Cracks are highly susceptible to propagate along the long, straight grain boundaries of the coarse columnar grains in deposit without ultrasonic assistance, while tortuous grain boundaries induced by ultrasonic assistance enhance crack resistance and inhibit crack propagation. As a result, crack-free L-DED Inconel 738 alloys with excellent ultimate tensile strength of 1478–1490 MPa and elongation of 15.3–17.8 % are achieved via ultrasonic assistance and are significantly higher than cast Inconel 738 (945 MPa, 7.5 %), indicating the feasibility of utilizing ultrasonic assistance to inhibit cracking in L-DED Inconel 738 alloy.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"921 ","pages":"Article 147607"},"PeriodicalIF":6.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Creep performance of a standard and modified version of laser powder bed fusion-processed Haynes 230

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-28 DOI: 10.1016/j.msea.2024.147620

Daniel McConville , Ben Rafferty , Kevin Eckes , Jeremy Iten , Amy Clarke , Jonah Klemm-Toole

{"title":"Creep performance of a standard and modified version of laser powder bed fusion-processed Haynes 230","authors":"Daniel McConville , Ben Rafferty , Kevin Eckes , Jeremy Iten , Amy Clarke , Jonah Klemm-Toole","doi":"10.1016/j.msea.2024.147620","DOIUrl":"10.1016/j.msea.2024.147620","url":null,"abstract":"<div><div>Haynes 230 is a solid solution and carbide precipitation strengthened nickel alloy often used in gas turbine engines. While the alloy is arc weldable, efforts to introduce the alloy to laser powder bed fusion additive manufacturing have been hindered by the presence of solidification cracking which severely debits mechanical properties. In this study, the creep performance of standard laser powder bed fusion processed Haynes 230 at 760 °C is compared to a modified, crack-free version of the alloy. The modified version of Haynes 230 exhibits lower minimum creep rates, higher creep ductilities, and longer rupture times compared to standard Haynes 230. Analysis using a creep rupture time model indicates that the primary factor leading to the longer creep life in the modified Haynes 230 is the lower minimum creep rate, attributed largely to an increased quantity of carbide precipitates, though the finer grain size in the modified alloy also made a small contribution. Due to the increases in creep performance, the modified version of the alloy shows similar creep behavior to wrought Haynes 230, while the standard version of the alloy shows considerably degraded creep performance. The results of this work show that minor compositional and microstructural modification is a meritorious pathway to manufacture legacy alloys with novel techniques such that the advantages which additive manufacturing offers, like increased component complexity and part consolidation, can be realized without developing new alloy systems.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"922 ","pages":"Article 147620"},"PeriodicalIF":6.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Enhancing strength-ductility synergy by introducing multilattice defects and heterogeneous structures in CoCrNi-based medium-entropy alloys prepared by powder plasma arc additive manufacturing

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-28 DOI: 10.1016/j.msea.2024.147609

Liuwei Wu , Yu Liang , Haiyan Yin , Yong Shen , Xizhang Chen

{"title":"Enhancing strength-ductility synergy by introducing multilattice defects and heterogeneous structures in CoCrNi-based medium-entropy alloys prepared by powder plasma arc additive manufacturing","authors":"Liuwei Wu , Yu Liang , Haiyan Yin , Yong Shen , Xizhang Chen","doi":"10.1016/j.msea.2024.147609","DOIUrl":"10.1016/j.msea.2024.147609","url":null,"abstract":"<div><div>In the work, cold rolling and annealing were applied to powder plasma arc additively manufactured (CoCrNi)<sub>94</sub>Al<sub>3</sub>Ti<sub>3</sub> medium-entropy alloy (MEA) to efficiently attain different types of lattice defects and heterogeneous structures, thereby enhancing the strength of the alloy. Tensile tests show that mechanical properties of the MEA were significantly enhanced after cold rolling and annealing treatments compared to the directly deposited alloys. The microstructure and mechanical properties of cold rolled samples (50 % thickness reduction) annealed at 1073–1273 K for 1 h are compared. It has been shown that the MEAs prepared by additive manufacturing accumulate a large amount of deformation energy within the grains during the cold rolling process. This lead to recrystallized grains first nucleating within the original columnar grains, and efficient recrystallization could be realized. At annealing temperatures ≤1173 K, the recrystallized grain size has not been coarsened, the coarse and fine grains formed a heterogeneous grain structure, leading to significant back stress strengthening. TEM observations at different alloys indicate that the formation and increase in the number of multiple lattice defects (SFs, DTs, and L–C locks) is the main reason for the high work-hardening capacity of the alloy. This investigation demonstrates that the combined approach provides a novel means to fabricate high strength and ductile CoCrNi-based MEAs.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"922 ","pages":"Article 147609"},"PeriodicalIF":6.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Post-processing of Inconel 718 superalloy by Laser-based Powder Bed Fusion: Microstructures and properties evaluation

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-28 DOI: 10.1016/j.msea.2024.147601

Subhendu Naskar , S. Suryakumar , Bharat B. Panigrahi

{"title":"Post-processing of Inconel 718 superalloy by Laser-based Powder Bed Fusion: Microstructures and properties evaluation","authors":"Subhendu Naskar , S. Suryakumar , Bharat B. Panigrahi","doi":"10.1016/j.msea.2024.147601","DOIUrl":"10.1016/j.msea.2024.147601","url":null,"abstract":"<div><div>In this work, IN718 superalloy has been additively manufactured through Laser-based Powder Bed Fusion (PBF) process. The present investigation aims to study the effect of post printing heat treatments on the metallurgical aspects, such as phases, crystallographic texture, microstructure evolutions and the mechanical properties. Heat treatment optimization has been pursued to achieve a better combination of strength and ductility. PBF fabricated material was further subjected to different heat treatments, comprising of homogenizing, solutionizing and ageing. Material was characterized with respect to the building direction (BD). As-printed specimen exhibits face centered cubic (FCC) γ matrix along with minor amounts of other phases. The melt pool boundaries were found to be rich in Niobium and Molybdenum, indicating segregation during fabrication. Upon post-heat treatments these segregations dissolved considerably. Heat treated microstructure exhibited homogeneously dispersed γ′ and γ′′ phases, and relatively small fractions of carbides, acicular and plate shaped δ phases. Heat treatments led to a significant increase in hardness (by about 54 %) and tensile strength (by about 45 %) while retaining considerable ductility.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"921 ","pages":"Article 147601"},"PeriodicalIF":6.1,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effect of precipitates on martensite formation and shape memory effect of FeMnSi-based shape memory alloys fabricated by laser powder bed fusion

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-26 DOI: 10.1016/j.msea.2024.147592

I. Ferretto , A. Sharma , D. Kim , N.M. Della Ventura , J. Michler , J. Capek , E. Polatidis , W.J. Lee , C. Leinenbach

{"title":"Effect of precipitates on martensite formation and shape memory effect of FeMnSi-based shape memory alloys fabricated by laser powder bed fusion","authors":"I. Ferretto , A. Sharma , D. Kim , N.M. Della Ventura , J. Michler , J. Capek , E. Polatidis , W.J. Lee , C. Leinenbach","doi":"10.1016/j.msea.2024.147592","DOIUrl":"10.1016/j.msea.2024.147592","url":null,"abstract":"<div><div>The initial and evolving microstructure during the tensile test of two Fe-17Mn-5Si-10Cr-4Ni shape memory alloys, with and without V, C and fabricated by laser powder bed fusion are investigated and compared via electron backscattered diffraction, transmission electron microscopy and in-situ neutron diffraction. Tensile samples are fabricated from the two alloys in order to analyze their thermo-mechanical properties. The addition of V and C leads to the formation of a high area density of fine precipitates, mainly carbides, after heat treatment. The chemistry modifications caused by carbide precipitation cause a decrease in the stacking fault energy (SFE), promoting the formation of wider stacking faults and higher volume fractions of martensite phase under loading, which affect the pseudo-elastic properties and deformation behavior of the material. The carbide-containing alloy shows higher strength, work-hardening capability and pseudo-elasticity compared to the carbide-free alloy. However, the shape memory effect is reduced in the former. The present work sheds light on the crucial role of alloy composition, precipitation and SFE in shaping the mechanical and shape memory properties of Fe-based shape memory alloys. The findings hold potential implications for the design and optimization of materials for specific engineering applications, where either enhanced pseudoelasticity or shape memory effect is desired.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"921 ","pages":"Article 147592"},"PeriodicalIF":6.1,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142743725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effect of γ′ size on the high-temperature low-stress creep of nickel-based single-crystal superalloys

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2024-11-26 DOI: 10.1016/j.msea.2024.147603

Hao Fan , Haibo Long , Junbo Zhao , Xiaoyi Yuan , Yunsong Zhao , Yinong Liu , Shengcheng Mao , Lihua Wang , Ze Zhang , Xiaodong Han

{"title":"Effect of γ′ size on the high-temperature low-stress creep of nickel-based single-crystal superalloys","authors":"Hao Fan , Haibo Long , Junbo Zhao , Xiaoyi Yuan , Yunsong Zhao , Yinong Liu , Shengcheng Mao , Lihua Wang , Ze Zhang , Xiaodong Han","doi":"10.1016/j.msea.2024.147603","DOIUrl":"10.1016/j.msea.2024.147603","url":null,"abstract":"<div><div>Nickel-based single crystal superalloys exhibit excellent high temperature mechanical properties due to their unique γ′-γ dual phase microstructure. Microstructure design is the major strategy for increasing their properties. However, the design strategy for the size of the γ′ phase is still lacking. This work investigates the effect of γ′ cuboid size on the creep-rupture life of nickel-based single crystal superalloys via a comparative experiment of two alloys of similar γ′ phase volume fractions and different elemental compositions. The alloy with smaller γ′ phase cuboids exhibits a creep-rupture life twice as long as the alloy with an average cuboid size 30 % larger. In addition, a smaller average γ′ phase cuboid size also contributes to a lower density of the dislocations, a smaller spacing of the raft and lower content of the topologically closed packed phases. The reasons behind these different mechanical properties and microstructures are discussed.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"921 ","pages":"Article 147603"},"PeriodicalIF":6.1,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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