Materials Characterization最新文献_第10页

The effect of the intercritical annealing process on the microstructure evolution, strength, and toughness of cryogenic 5.5Ni steel 临界间退火工艺对低温5.5Ni钢组织演变、强度和韧性的影响

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-08 DOI: 10.1016/j.matchar.2025.115005

Zhonglin Wu , Guangming Cao , Yang Sun , Qiming Jiang , Xuyuan Zhang , Pengjie Wang , Biao Deng , Zhaoxia Liu , Zhenyu Liu

{"title":"The effect of the intercritical annealing process on the microstructure evolution, strength, and toughness of cryogenic 5.5Ni steel","authors":"Zhonglin Wu , Guangming Cao , Yang Sun , Qiming Jiang , Xuyuan Zhang , Pengjie Wang , Biao Deng , Zhaoxia Liu , Zhenyu Liu","doi":"10.1016/j.matchar.2025.115005","DOIUrl":"10.1016/j.matchar.2025.115005","url":null,"abstract":"<div><div>This study investigates the influence of intercritical annealing time on the evolution of the microstructure of cryogenic 5.5Ni steel's strength and toughness under QLT heat treatment conditions. Testing revealed that the microstructure of the cryogenic 5.5Ni steel primarily consists of martensite (lath/block) and ferrite (lath/polygon). The impact toughness of the tested steel is influenced mainly by the ratio of high to low-angle grain boundaries and the distribution of soft and hard phase microstructures. The mechanical properties are affected by fine-grain strengthening and dislocation motion. The findings indicate that fine-grain strengthening is the primary strength of the tested steel during the short intercritical annealing treatment. Conversely, during the extended intercritical annealing process, dislocation motion becomes predominant. Addressing the negative impacts of grain growth during extended intercritical annealing treatment is essential to improve yield and tensile strength while minimizing plasticity and impact toughness. Additionally, dislocations were found to be dispersed along the edges of grain boundaries and aggregated at these boundaries in the tested steels. The microstructure features parallel dislocations and dislocation jogs, which increase the material's deformation resistance. When subjected to external stress, dislocation jogs can successfully restrict the mobility of some dislocations and prevent them from expanding. Under external stress, dislocation jogs effectively limit the mobility of inevitable dislocations, preventing their propagation. This enhances both the mechanical properties and impact toughness of the tested steel.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115005"},"PeriodicalIF":4.8,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826242","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 Ti and Al induced phase competition on FeCoNi-based multi-component alloys Ti和Al诱导相竞争对feconi基多组分合金的影响

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-08 DOI: 10.1016/j.matchar.2025.115026

Xinghua Zhu , Bowen Chen , Qingguo Feng , Ning Wang , Lei Xiao , Yi Xu

{"title":"Effect of Ti and Al induced phase competition on FeCoNi-based multi-component alloys","authors":"Xinghua Zhu , Bowen Chen , Qingguo Feng , Ning Wang , Lei Xiao , Yi Xu","doi":"10.1016/j.matchar.2025.115026","DOIUrl":"10.1016/j.matchar.2025.115026","url":null,"abstract":"<div><div>The competition between entropy and enthalpy caused by high contents of Ti or/and Al makes the stability of the system and the strengthening effect of the precipitates elusive. Meanwhile, the competition between Al- and Ti-induced precipitates promotes the need to investigate whether the stability and strengthening effect of the L1<sub>2</sub> phase can be realized in systems with high Al and Ti content. In this work, the stability and mechanical properties of equimolar ratio FeCoNi, FeCoNiAl, FeCoNiTi, and FeCoNiTiAl multi-principal elements alloys was investigated using first principles calculations and experiments. The results show that the effect of Ti to enhance the stability of FCC can inhibit the effect of Al to enhance the stability of BCC, but the competition between the high content of Ti and Al-induced precipitates makes the system not macroscopically ductile. In addition, the introduction of high content Ti alone brings high strength and some degree of macroscopic ductility to the system, which is attributed to the combined effect of FCC matrix and L1<sub>2</sub>-type precipitates. Besides, the introduction of high Al content alone makes the system exhibit BCC structure and brittleness. This work provides a wealth of data and insights for the design and utilization of precipitate-strengthened multi-component alloys.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115026"},"PeriodicalIF":4.8,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833504","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 innovations: Microstructure optimisation for ultra-high silicon electrical steel components 增材制造创新：超高硅电工钢部件的微观结构优化

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-08 DOI: 10.1016/j.matchar.2025.115002

Rasoul Karami , David Butler , Yashar Javadi , Saeed Tamimi

{"title":"Additive manufacturing innovations: Microstructure optimisation for ultra-high silicon electrical steel components","authors":"Rasoul Karami , David Butler , Yashar Javadi , Saeed Tamimi","doi":"10.1016/j.matchar.2025.115002","DOIUrl":"10.1016/j.matchar.2025.115002","url":null,"abstract":"<div><div>The main objective of this work is to fabricate high‑silicon electrical steel with an optimized microstructure for magnetic applications through additive manufacturing (AM) routes. Traditional thermomechanical manufacturing routes, such as hot and cold rolling operations, have struggled to produce non-oriented electrical steel (NGOES) components with more than 3.4 wt% Si contents. However, the need for efficiency improvements requires an increase in silicon contents up to 6.5 wt%, leading to compromised magnetic and mechanical properties through conventional manufacturing techniques resulting in technical limitations on the production of these alloys. AM is a promising manufacturing approach that can address this challenge through near-net-shape fabrication. Optimisation process conditions in AM provide flexibility and enable better, more precise control over the microstructure. This study explores the microstructure and texture development of FeSi 6.5 wt% NGOES fabricated via laser metal deposition (LMD), with a build plate preheated to 200 °C to mitigate thermal stresses and cracking. The influence of process parameters on microstructure has been investigated. Process parameters, including laser power (400–500 W) and scanning speed, were adjusted to modify melt pool geometry, with energy density ranging from 74 J/mm<sup>2</sup> upward. Microstructure and texture were characterized using electron back-scatter diffraction (EBSD), revealing elongated grains with a strong 〈001〉//BD fibre texture. Higher laser energy density enhances cube texture, improving magnetic properties, while increased laser power increases grain size, favouring <001> texture. These findings highlight the critical roles of energy density, laser power, and build plate temperature in tailoring NGOES microstructure and texture for enhanced performance.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115002"},"PeriodicalIF":4.8,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808433","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

3-dimensional atomic structures of the thickening T1-phase precipitates in AlCuLi(Mg) alloys 微积分（Mg）合金中增厚t1相析出物的三维原子结构

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-07 DOI: 10.1016/j.matchar.2025.115015

G.S. Chen , S.Y. Li , W.Q. Ming , C.L. Wu , J.H. Chen

{"title":"3-dimensional atomic structures of the thickening T1-phase precipitates in AlCuLi(Mg) alloys","authors":"G.S. Chen , S.Y. Li , W.Q. Ming , C.L. Wu , J.H. Chen","doi":"10.1016/j.matchar.2025.115015","DOIUrl":"10.1016/j.matchar.2025.115015","url":null,"abstract":"<div><div>The plate-like T<sub>1</sub>-phase (Al<sub>2</sub>CuLi) precipitates are the key strengthening precipitates in the AlCuLi alloys for aerospace applications. However, their 3-dimensional atomic structures are still an issue full of controversy, since the Li positions in the T<sub>1</sub>-phase are difficult to determine with the characterization tools available, and since the frequently observed one-unit-cell-thick T<sub>1</sub>-phase precipitates are difficult to grow into real 3-dimensional crystals. There exist quite a lot of atomic structural models that need to be clarified or confirmed for the T<sub>1</sub>-phase. Here, we report that all Li-atoms in the thickened T<sub>1</sub>-phase precipitates can clearly be visualized, and their crystal structures can be determined precisely, using the integrated differential phase contrast scanning transmission electron microscopy (iDPC-STEM). It has been demonstrated that three basic atomic structures are observed in multi-unit-cell-thick (MUCT) T<sub>1</sub>-phase precipitates. Other MUCT ones consist of various combinations of these three basic structures, or they represent distinct orientations of the same structure form. The formation of stacking types of T<sub>1</sub>-phase precipitates has also been discussed. Our study provides atomic-scale insights into the complex growth mechanisms of T<sub>1</sub>-precipitates in AlCuLi alloys.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115015"},"PeriodicalIF":4.8,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817351","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 ultrasonic conditions on microstructural and mechanical of Sn58Bi and Sn58Bi solder joints with 0.6 % Si3N4 nanoparticles 超声条件对含0.6% Si3N4纳米颗粒Sn58Bi和Sn58Bi焊点组织和力学性能的影响

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-07 DOI: 10.1016/j.matchar.2025.115019

Kai Deng , Liang Zhang , Li-Li Gao , Meng Zhao , Xiao-Bin Zhang , Mo Chen , Xin-Quan Yu , Quan-Bin Lu , Lei Sun

{"title":"Effect of ultrasonic conditions on microstructural and mechanical of Sn58Bi and Sn58Bi solder joints with 0.6 % Si3N4 nanoparticles","authors":"Kai Deng , Liang Zhang , Li-Li Gao , Meng Zhao , Xiao-Bin Zhang , Mo Chen , Xin-Quan Yu , Quan-Bin Lu , Lei Sun","doi":"10.1016/j.matchar.2025.115019","DOIUrl":"10.1016/j.matchar.2025.115019","url":null,"abstract":"<div><div>This study used ultrasonic time as a variable to test Sn58Bi and Sn58Bi solder joints with 0.6 % Si<sub>3</sub>N<sub>4</sub> nanoparticles. Ultrasound was applied to the solder joints for 0, 5, 10, and 15 s to observe how the microstructural and mechanical properties changed in the solder joints. It was found that the microstructure of the solder joint became more uniform with increasing ultrasonic time, and the thickness of the IMC increased after the application of ultrasound. Compared with Sn58Bi, the IMC of Sn58Bi-0.6Si₃N₄ was thicker. The IMC became more uniform when the ultrasonic time reached 15 s. In the absence of ultrasonic treatment, the solder still contained large particles, but with the increase in ultrasonic time, the grains became smaller. The shear strength increased with increasing ultrasonic time, reaching a maximum at 15 s of ultrasonic treatment. Compared to Sn58Bi, Sn58Bi-0.6Si₃N₄ had smaller particles and higher shear strength in its solder joints for the same ultrasonic time. The maximum shear strength reached 58.50 MPa at 15 s of ultrasonic time.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115019"},"PeriodicalIF":4.8,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817350","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 Sn on the rust layer structure of new high-Cr-content steels in a high chloride ion concentration environment 高氯离子环境下Sn对新型高cr钢锈层结构的影响

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-05 DOI: 10.1016/j.matchar.2025.114981

Lizhi Qin , Bingxiao Shi , Feifan Xu , Xuequn Cheng , Chao Liu , Di Xu , Xiaogang Li

引用次数: 0

Advanced creep life in a Ni-based superalloy through γ' phase shape optimization with varying Al content 通过改变Al含量优化γ′相形状，提高ni基高温合金的蠕变寿命

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-05 DOI: 10.1016/j.matchar.2025.115009

Kaixuan Cheng , Shengwei Lv , Weidong Xuan , Yiwei Wang , Yuyang Hou , Baojun Wang , Zhongming Ren

引用次数: 0

Meso/micro scale slip system activity study in Ti6Al4V using high resolution digital image correlation 利用高分辨率数字图像相关技术研究Ti6Al4V中微尺度滑动系统活动

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-04 DOI: 10.1016/j.matchar.2025.114997

Bo Pang

引用次数: 0

Annealing twin development in austenite in steels after hot deformation 热变形后钢中奥氏体的退火孪晶发展

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-04 DOI: 10.1016/j.matchar.2025.115012

Pablo Garcia-Chao , Tuomo Nyyssönen , Adam Ståhlkrantz , Hans Magnusson

{"title":"Annealing twin development in austenite in steels after hot deformation","authors":"Pablo Garcia-Chao , Tuomo Nyyssönen , Adam Ståhlkrantz , Hans Magnusson","doi":"10.1016/j.matchar.2025.115012","DOIUrl":"10.1016/j.matchar.2025.115012","url":null,"abstract":"<div><div>Twinning development in the annealing of hot-deformed austenite in steels has often been suggested to play a relevant role in e.g. the evolution of grain size and texture across the process. Nevertheless, the phenomenon has not been systematically studied. In this view, a detailed assessment of annealing twin boundary evolution in austenite after hot deformation is carried out for the first time. Particularly, three materials are examined via electron backscatter diffraction (EBSD): a stainless steel, a carbon steel, and a Ni-30Fe alloy. Results demonstrate that twin boundaries form via recrystallization, and disappear by grain growth. However, unlike previously reported for lower annealing temperature in nickel, the number of twins per recrystallized grain does not increase throughout recrystallization. On the contrary, it stagnates before its end, upon activation of concomitant grain growth. Additionally, twin density increases with lower deformation/annealing temperature, higher strain rate, and higher applied strain. This has been rationalized via the higher resultant stored energy, which increases the density of microstructural discontinuities inside the deformed matrix (and, thereby, the rate of growth accidents). By contrast, no correlation has been observed between the measured boundary tortuosity and twin density. While Σ3 and Σ9 boundaries appear at the same rate during recrystallization, Σ9 ones disappear considerably more quickly with grain growth. Finally, the twin density trends examined after EBSD parent austenite reconstruction on the carbon steel have all been consistent. Consequently, that method represents a promising approach to analyze annealing twinning in steels that undergo phase transformations upon cooling.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115012"},"PeriodicalIF":4.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792014","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

Cooperative strengthening and toughening of titanium alloy weld joints by solute atom W and TiC ceramic particles 溶质W原子和TiC陶瓷颗粒对钛合金焊缝的协同强化增韧

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-04-04 DOI: 10.1016/j.matchar.2025.115007

Zhen Li , Yingzhe Li , Wenshan Guo , Qinglong Wu , Jianwei Dong , Zhen Luo

{"title":"Cooperative strengthening and toughening of titanium alloy weld joints by solute atom W and TiC ceramic particles","authors":"Zhen Li , Yingzhe Li , Wenshan Guo , Qinglong Wu , Jianwei Dong , Zhen Luo","doi":"10.1016/j.matchar.2025.115007","DOIUrl":"10.1016/j.matchar.2025.115007","url":null,"abstract":"<div><div>The strength-ductility trade-off remains a significant challenge in alloy welding. This study introduces an in-situ alloying design strategy for weld seams, achieving a strength-ductility synergy in welded joints through the simultaneous incorporation solute atoms and heterogeneous nucleating agents. In this study, W and TiC particles are selected as representatives, and this system is not limited to these two. The W solute atoms enhance the compositional undercooling of the molten pool while promoting TiC nucleation. The nano-TiC particles amplify the solid-solution strengthening effect of W and provide low-energy-barrier heterogeneous nucleation sites. These synergistic effects facilitate the transformation from columnar to equiaxed grains, significantly reducing texture intensity and decreasing the average grain size from 243.63 μm to 123.16 μm—a reduction of 49.4 %. Additionally, the needle-like martensite within β-Ti grains transforms into low-aspect-ratio martensite. Compared to the Ti64 joint, the welded joint with W and TiC exhibits a tensile strength of 1106 MPa and an elongation of 7.2 %, representing increases of 21 % and 36 %, respectively, with a mixed ductile-brittle fracture characteristic. The W and in-situ-generated nano-TiC particles obstruct dislocation motion, triggering multiple strengthening mechanisms (grain boundary strengthening, solid solution strengthening, dislocation strengthening, Orowan strengthening and load transfer strengthening.). Furthermore, these particles inhibit crack propagation, enhancing strain-hardening capability and improving elongation without sacrificing strength.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"224 ","pages":"Article 115007"},"PeriodicalIF":4.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859924","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