Materials Characterization最新文献_第5页

Improvement of creep resistance and its mechanism of a F/M steel through the ODS strategy

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-17 DOI: 10.1016/j.matchar.2025.114939

Yingjie Wang , Lu Han , Haodong Jia , Hongbo Zhang , Haochen Guan , Chao Wang , Xianghong Su , Yuexuan Zhu , Xiaodong Mao , Zhangjian Zhou

{"title":"Improvement of creep resistance and its mechanism of a F/M steel through the ODS strategy","authors":"Yingjie Wang , Lu Han , Haodong Jia , Hongbo Zhang , Haochen Guan , Chao Wang , Xianghong Su , Yuexuan Zhu , Xiaodong Mao , Zhangjian Zhou","doi":"10.1016/j.matchar.2025.114939","DOIUrl":"10.1016/j.matchar.2025.114939","url":null,"abstract":"<div><div>With the advancement of fast reactor technology, its cladding materials must be capable of withstanding more intense neutron irradiation, higher service temperature, and longer service lifetime. The properties of currently employed ferritic/martensitic steels, particularly in terms of their creep resistance, fall short of meeting these stringent requirements. This study investigates how the creep resistance was improved for a HT9 steel by the oxide dispersion-strengthening (ODS) strategy. Experimental analyses demonstrate that HT9-ODS steel exhibits markedly superior creep resistance compared to that of conventional HT9 steel. Creep life predictions, based on the Monkman–Grant (M-G) relationship, reveal that under creep conditions of 650 °C and 120 MPa, the creep life of HT9-ODS can reach several hundred thousand hours, significantly higher than that of HT9, which is only in the range of tens of hours. Microstructural investigations indicate that the enhanced creep resistance of HT9-ODS is primarily due to the interaction between ultrafine, high-density nano oxide particles and dislocations during creep. The pinning and attraction of nano-oxide particles on dislocations leads to the generation of ‘threshold stress’. When the creep stress is lower than the threshold stress, creep deformation is difficult to proceed, therefore significantly extending the creep life. To further validate and predict the creep behavior of HT9-ODS, two dislocation creep models were applied, affirming the particle-strengthened dislocation creep mechanism as a key factor in its superior creep performance.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"223 ","pages":"Article 114939"},"PeriodicalIF":4.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681151","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 quenching temperature on the strengthening contributions due to the (V,Nb)X carbonitrides to the creep resistance of 9Cr-1W-1Mo steel

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-17 DOI: 10.1016/j.matchar.2025.114942

A. Fedoseeva, S. Degtyareva, I. Brazhnikov, R. Kaibyshev

{"title":"Effect of quenching temperature on the strengthening contributions due to the (V,Nb)X carbonitrides to the creep resistance of 9Cr-1W-1Mo steel","authors":"A. Fedoseeva, S. Degtyareva, I. Brazhnikov, R. Kaibyshev","doi":"10.1016/j.matchar.2025.114942","DOIUrl":"10.1016/j.matchar.2025.114942","url":null,"abstract":"<div><div>The increase in quenching temperature from 1050 °C to 1150 °C favorably affects the creep behavior of the P911-type steel, which is expressed in the increase in the rupture time by a few times and the decrease in the minimum creep rate under the applied stresses ranging from 160 to 120 MPa. However, as the applied stresses decrease, such improvement disappears; the 100,000 h creep strength is 70–75 MPa regardless of quenching temperature. A higher quenching temperature stimulates the significant dissolution of (V,Nb)X carbonitrides in the austenite region and their precipitation during tempering and the primary creep stage. This reduces the interparticle spacing during the primary creep stage that provides a high value of the detachment stress due to the (V,Nb)X of 30…34 MPa, even with an increase in their average particle size by 1.5–2 times, and is considered to be the main reason for the improved creep resistance under the high applied stresses. However, the growth rate constants for VX carbonitrides and M<sub>23</sub>C<sub>6</sub> carbides were found to be similar during creep, regardless of the heat treatment regimens. The elimination of the difference in the particle dispersions during creep leads to the disappearance of the increment in the rupture times under the low applied stresses.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"223 ","pages":"Article 114942"},"PeriodicalIF":4.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681258","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

Optimization method and mechanism of microstructure and properties of WAAM AlCu alloy reinforced with two-dimensional h-BN particles

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-17 DOI: 10.1016/j.matchar.2025.114944

Tao Yuan , Shijia Yang , Yang Li , Shuwen Wang , Yunong Sha , He Shan , Shujun Chen

{"title":"Optimization method and mechanism of microstructure and properties of WAAM AlCu alloy reinforced with two-dimensional h-BN particles","authors":"Tao Yuan , Shijia Yang , Yang Li , Shuwen Wang , Yunong Sha , He Shan , Shujun Chen","doi":"10.1016/j.matchar.2025.114944","DOIUrl":"10.1016/j.matchar.2025.114944","url":null,"abstract":"<div><div>The mechanical properties of Al<img>Cu alloys produced through wire arc additive manufacturing (WAAM) often suffer from degradation due to continuous coarse precipitate phases and uneven microstructure. This research investigated the incorporation of h-BN particles into the deposition process of Al<img>Cu alloys during WAAM, examining how these h-BN particles influence the microstructure and overall properties of the material. The results indicate that h-BN particles promoted grain refinement, leading to a uniform equiaxed grain microstructure and addressing the issue of uneven interlayer microstructure. By generating a large number of fine, dot-like precipitates, the continuous coarse precipitates distributed along the grain boundaries (GBs) were disrupted. The tensile strength increased from 171.8 ± 18.7 MPa to 254.4 ± 8.7 MPa in the horizontal direction and from 183.6 ± 19.4 MPa to 271.8 ± 16.2 MPa in the vertical direction, representing an improvement of 48 % in both directions. The elongation increased by 44 % and 32 % in the horizontal and vertical directions, respectively. However, there is no significant relationship between the change in elongation and the amount of particles added. This is attributed to the fact that the increase in dot-like precipitates and GBs inhibits crack growth, while the increase in pore number promote it. These two effects, on the whole, reach a certain level of equilibrium.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"223 ","pages":"Article 114944"},"PeriodicalIF":4.8,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681257","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

Study on correlation between mechanical properties and micro/nano-structure of Sm2Co17-type permanent magnets

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-14 DOI: 10.1016/j.matchar.2025.114934

Chuanghui Dong , Fangqin Hu , Jiabin Wang , Sidi Wang , Bo Zhou , Lei Liu , Yingli Sun , Yong Ding , Aru Yan

{"title":"Study on correlation between mechanical properties and micro/nano-structure of Sm2Co17-type permanent magnets","authors":"Chuanghui Dong , Fangqin Hu , Jiabin Wang , Sidi Wang , Bo Zhou , Lei Liu , Yingli Sun , Yong Ding , Aru Yan","doi":"10.1016/j.matchar.2025.114934","DOIUrl":"10.1016/j.matchar.2025.114934","url":null,"abstract":"<div><div>Sm<sub>2</sub>Co<sub>17</sub>-type permanent magnets are extensively utilized in high-temperature applications due to their exceptional magnetic properties and thermal stability. However, their poor mechanical properties increase manufacturing costs and shorten their operational lifespan. In this work, we have investigated the intricate relationship between the mechanical properties and the micro/nano-structure within Sm<sub>2</sub>Co<sub>17</sub>-type magnets. We found that a magnet characterized by small grain size, grain boundaries enriched with a Cu-rich phase, and a fine and complete cellular nanostructure within the grains exhibit excellent flexural strength. At the micro-scale, the grain refinement effectively prevents crack propagation. Additionally, the Cu-rich phase enhances the inter-grain bonding and strengthens grain boundaries. At the nano-scale, the development of fine and uniform cellular nanostructure within the grains further amplifies the magnet's superior mechanical properties by facilitating more uniform stress distribution and enhanced resistance to deformation. These findings have the potential to guide the optimization of the mechanical properties of Sm<sub>2</sub>Co<sub>17</sub>-type magnets.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"223 ","pages":"Article 114934"},"PeriodicalIF":4.8,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654620","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

Ultrafine-grained high-interstitial martensitic stainless steel via thermochemical processing

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-14 DOI: 10.1016/j.matchar.2025.114913

Konstantin V. Werner , Marina Tsikh , Flemming B. Grumsen , Thomas L. Christiansen , Marcel A.J. Somers , Matteo Villa

引用次数: 0

Low-temperature brazing of SiCp/Al composites with Bi2O3-B2O3-ZnO-SiO2-Al2O3 glass in air

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-13 DOI: 10.1016/j.matchar.2025.114932

Duo Liu , Rui Jiang , Yanyu Song , Naibin Chen , Tao Wang , Hong Bian , Wei Fu , Baoqiang Wang , Xiaoguo Song

{"title":"Low-temperature brazing of SiCp/Al composites with Bi2O3-B2O3-ZnO-SiO2-Al2O3 glass in air","authors":"Duo Liu , Rui Jiang , Yanyu Song , Naibin Chen , Tao Wang , Hong Bian , Wei Fu , Baoqiang Wang , Xiaoguo Song","doi":"10.1016/j.matchar.2025.114932","DOIUrl":"10.1016/j.matchar.2025.114932","url":null,"abstract":"<div><div>In this study, low-melting Bi<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>-ZnO-SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> (BBZSA) glass was adopted to braze SiC<sub>p</sub>/Al composite, and the effects of brazing temperature and holding time on the microstructure and mechanical properties of the SiC<sub>p</sub>/Al joint were investigated. The BBZSA glass started to spread and wet on the surface of SiC<sub>p</sub>/Al composite at the temperature of 480 °C. The typical microstructure at this temperature was SiC<sub>p</sub>/Al + Bi<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>-ZnO glass + Bi<sub>24</sub>B<sub>2</sub>O<sub>39</sub> + Si<sub>2</sub>Al<sub>2</sub>O<sub>7</sub> + SiO<sub>2</sub>, and the interface was bonded by the intermolecular force between the Bi<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>-ZnO (BBZ) glass and SiC<sub>p</sub>/Al composite. Besides, the precipitation of the Bi<sub>24</sub>B<sub>2</sub>O<sub>39</sub> phase improved the mechanical properties of the joint with a maximum strength of 17.3 MPa, and the fractures all occurred in the Bi<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>-ZnO (BBZ) glass of the brazing seam. The proof-of-concept study on the brazing of SiC<sub>p</sub>/Al composite with BBZSA glass provides insights in the further development of ceramic/metal composite joining.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"223 ","pages":"Article 114932"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628331","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 annealing twinning on the microstructure and microtexture of pure nickel

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-13 DOI: 10.1016/j.matchar.2025.114924

Q.Q. Shi , S. Wang , J. Qiao , J. Wang , C. Chen , L.M. Luo

{"title":"Effect of annealing twinning on the microstructure and microtexture of pure nickel","authors":"Q.Q. Shi , S. Wang , J. Qiao , J. Wang , C. Chen , L.M. Luo","doi":"10.1016/j.matchar.2025.114924","DOIUrl":"10.1016/j.matchar.2025.114924","url":null,"abstract":"<div><div>The evolution of microstructure, including recrystallization, microtexture and twinning of pure nickel under isochronal annealing at a series of temperatures, was investigated by electron backscatter diffraction (EBSD). The results indicated that the typical copper-type rolling texture was present in the as-deformed pure nickel plate. During static recrystallization (SRX), new SRX grains were found to preferentially consume higher Taylor factor components, such as the Copper component. For SRX grains, the Taylor factor and annealing twinning had an interactive effect on texture evolution. Certain recrystallization texture components, e.g., the Q component, showed a growing tendency upon recrystallization first and then declined during the grain growth phase consistent with the development of annealing twinning. The processes of SRX of pure nickel were dominated by discontinuous static recrystallization (DSRX) characterized by bulging/serration of pre-existing high-angle grain boundaries (HAGBs) and the formation of necklace-type structures between deformed grains. The preferred position of necklacing and the curvature of a bulging lay on the side of deformed grains with comparatively larger orientation gradient. Furthermore, growth twins enhanced the boundary misorientation angle of recrystallization front in the range of 10–20 deg., facilitating bulging and separation. Multiple twinning chains, even up to the third generation, were observed to support further expansion of the layered necklace grains. Continuous static recrystallization (CSRX) accompanied with annealing-induced higher angle boundaries, though present, was quite less significant.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"223 ","pages":"Article 114924"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681153","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

Hybrid carbon‑silicon carbide fibers produced from stabilized pitch filaments and carbon fibers

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-13 DOI: 10.1016/j.matchar.2025.114931

Priscila Sieira , Caroline J.B. Guimarães , Eduardo de Sousa Lima , Maria Helena Pereira , Luiz E.P. Borges

{"title":"Hybrid carbon‑silicon carbide fibers produced from stabilized pitch filaments and carbon fibers","authors":"Priscila Sieira , Caroline J.B. Guimarães , Eduardo de Sousa Lima , Maria Helena Pereira , Luiz E.P. Borges","doi":"10.1016/j.matchar.2025.114931","DOIUrl":"10.1016/j.matchar.2025.114931","url":null,"abstract":"<div><div>Carbon fibers and their intermediates, oxidative-stabilized filaments, were used as carbon sources in the chemical vapor reaction method to produce carbon‑silicon carbide fibers. A comprehensive analysis of the microstructure and composition of the fibers was achieved using a combination of microscopic detectors, including Secondary Electron (SE), Backscattered Electron (BSE), and Energy Dispersive X-ray Spectroscopy (EDS). This analysis revealed a dense carbide layer and SiC deposits within the fibers, positioned near their core, in samples derived from both precursors. The reaction conditions and precursors allowed the diffusion of SiO gas through the fiber structure. This method, when applied to stabilized filaments, demonstrated the feasibility of simultaneously forming carbide during fiber carbonization. SiC nanowires were observed exclusively in products derived from carbon fibers. Through X-ray diffraction (XRD) and Raman spectroscopy, crystallinity and defects of the raw materials and hybrids were assessed. The small differences did not justify the absence of the nanostructures in hybrids produced from stabilized filaments. Instead, the lack of SiC whiskers were associated with the emission of volatile compounds at the high temperature treatment.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"223 ","pages":"Article 114931"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654619","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

Additive manufacturing of a crack-free tool steel with high C and Cr contents: Microstructure and mechanical properties

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-13 DOI: 10.1016/j.matchar.2025.114919

Nicole Ofner , Sabine C. Bodner , Michael Meindlhumer , Atacan Asci , Kevin Kutleša , Philipp Höbenreich , Christin Aumayr , Liang Wu , Christoph Turk , Jozef Keckes

{"title":"Additive manufacturing of a crack-free tool steel with high C and Cr contents: Microstructure and mechanical properties","authors":"Nicole Ofner , Sabine C. Bodner , Michael Meindlhumer , Atacan Asci , Kevin Kutleša , Philipp Höbenreich , Christin Aumayr , Liang Wu , Christoph Turk , Jozef Keckes","doi":"10.1016/j.matchar.2025.114919","DOIUrl":"10.1016/j.matchar.2025.114919","url":null,"abstract":"<div><div>Martensitic Cr steels are valued in tool steel applications for their polishability and balanced mechanical properties at high temperatures. Traditionally produced using conventional methods, these steels can benefit from additive manufacturing (AM), which allows for adjustments in component shape and microstructure. However, AM techniques have rarely been used for martensitic Cr steels due to their susceptibility to cracking caused by the elevated carbon contents. Hence, this study aimed to produce a crack-free, fully dense martensitic Cr steel with up to 20 wt% Cr <em>via</em> laser beam powder bed fusion (LB-PBF), using a platform preheated to 200 °C. A design-of-experiments model was implemented for 18 cubic samples, varying laser power, scanning speed, and hatch distance. Metallographic analysis revealed a crack-free microstructure for all samples. The best parameter set achieved a remarkable relative density of 99.99 %, printed at a volumetric energy density of 72 J/mm<sup>3</sup>. Using this parameter set, larger samples were printed for detailed material characterization in both the as-built (AB) and the heat-treated (HT) condition, after austenitization, quenching and three tempering steps. Mechanical properties were evaluated through tensile and hardness tests, while microstructure analysis employed scanning electron microscopy, electron backscatter diffraction, and X-ray diffraction. Results revealed a homogeneous microstructure, primarily consisting of fcc-Fe phase in the AB condition and bcc-Fe phase in the HT condition, with mechanical properties comparable to conventionally produced martensitic Cr steels. This comprehensive characterization provided a thorough understanding of the microstructure and mechanical properties of the 3D-printed martensitic Cr steel in both the AB and HT conditions.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"223 ","pages":"Article 114919"},"PeriodicalIF":4.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681158","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

Understanding the role of microstructure on creep anisotropy in additively manufactured IN718

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-03-12 DOI: 10.1016/j.matchar.2025.114935

Singaravelu Rajan Sabari , N.T.B.N. Koundinya , S.V.S. Narayana Murty , B.K. Nagesha , G.D. Janaki Ram , Ravi Sankar Kottada

{"title":"Understanding the role of microstructure on creep anisotropy in additively manufactured IN718","authors":"Singaravelu Rajan Sabari , N.T.B.N. Koundinya , S.V.S. Narayana Murty , B.K. Nagesha , G.D. Janaki Ram , Ravi Sankar Kottada","doi":"10.1016/j.matchar.2025.114935","DOIUrl":"10.1016/j.matchar.2025.114935","url":null,"abstract":"<div><div>This study investigates the predominant influence of microstructural features resulting from the additive manufacturing process and subsequent heat treatment on the creep rupture behaviour of laser powder bed fusion additively manufactured Inconel 718 (LPBF-AM-IN718) with respect to different build orientations. Two build orientations were produced through an LPBF process followed by stress relief annealing at 980 °C (15 min). Subsequently, the heat treatment (HT) cycle involving solution treatment at 1080 °C followed by conventional double ageing treatment was employed. Detailed microstructural characterization was performed both along and normal to the build direction using SEM, EBSD, TEM and STEM-EDS, revealing the presence of precipitate-free zones adjacent to the grain boundaries. Creep characterization of the two differently oriented specimens in the temperature range of 625–675 °C and at 500–750 MPa indicate a superior creep resistance of vertical build (loading along the build direction) specimens compared to horizontal build (loading normal to the build direction) specimens. The correlation of heat-treated microstructures, creep deformation behaviour and comprehensive post-deformation microstructural characterization illustrates that damage accumulation occurs via grain boundary cavitation predominantly along the transverse grain boundaries and is rationalized to be the dominant softening mechanism in HB specimens. In contrast, the triple point cavitation leading to damage initiation and subsequent propagation was recognized as the damage mechanism in VB specimens. This study emphasizes that creep anisotropy in AM IN718 alloys is not solely due to a single microstructural feature; instead, it results from the complex interplay among various factors, including grain morphology, crystallographic texture and microsegregation.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"223 ","pages":"Article 114935"},"PeriodicalIF":4.8,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681157","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