Materialia最新文献_第6页

Role of annealing conditions prior to cold rolling on microstructure and tensile deformation behavior of a medium-Mn steel 冷轧前退火条件对中锰钢组织和拉伸变形行为的影响

IF 2.9

Materialia Pub Date : 2025-08-01 DOI: 10.1016/j.mtla.2025.102502

Mohd Furkan Ansari , G.K. Bansal , Gopi Kishor Mandal , Abir Bhattacharyya

{"title":"Role of annealing conditions prior to cold rolling on microstructure and tensile deformation behavior of a medium-Mn steel","authors":"Mohd Furkan Ansari , G.K. Bansal , Gopi Kishor Mandal , Abir Bhattacharyya","doi":"10.1016/j.mtla.2025.102502","DOIUrl":"10.1016/j.mtla.2025.102502","url":null,"abstract":"<div><div>A low-carbon medium-Mn steel is designed utilizing CALPHAD approach to leverage the transformation induced plasticity (TRIP) for the enhancement of strength-ductility combination. The as-cast steel produced by vacuum induction melting, was hot forged, and was subsequently hot-rolled and air-cooled to room temperature (HRAC). The hot-rolled plate was subjected to two different thermomechanical processing routes- (i) inter-critical annealing (IA) to obtain partial austenitization followed by air cooling (S1 or HRIA), and (ii) annealing above the upper critical temperature to obtain full austenitization and subsequent air cooling (S2). Both steels were cold-rolled followed by IA and subsequent water quenching to room temperature (S1-IA and S2-IA, or CRIA) to obtain different microstructures. The steels were characterized for phase fractions and recrystallization, grain boundary characteristics, and dislocation densities. The HRIA steel showed greater strain-hardening but lower ductility than the CRIA steels due to HCP-martensite mediated TRIP. The CRIA steels exhibited same UTS <span><math><mo>×</mo></math></span> TE<span><math><mo>≈</mo></math></span>20.5 GPa%. S1-IA exhibited higher yield and tensile strength, but lower uniform elongation than S2-IA, despite having higher austenite volume fraction. The higher yield strength is attributed to the higher dislocation density of ferrite in S1-IA, in which TRIP activates at a higher stress due to smaller austenite grains size. The lower yield strength, and easier initiation of TRIP in S2-IA are attributed to a more recrystallized ferrite with lower dislocation density, and coarser austenite grains, respectively. However, the higher C of retained austenite in S2-IA increases its stability requiring larger tensile strain for continuation of TRIP effect leading to higher uniform elongation than S1-IA.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102502"},"PeriodicalIF":2.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic effect on dielectric behavior of LaCoO3 film 磁效应对LaCoO3薄膜介电性能的影响

IF 2.9

Materialia Pub Date : 2025-08-01 DOI: 10.1016/j.mtla.2025.102497

Yingtang Zhang , Jing Zhang , Guanhua Xu , Dongzhi Fu , Weidong Wang , Shengtao Li

{"title":"Magnetic effect on dielectric behavior of LaCoO3 film","authors":"Yingtang Zhang , Jing Zhang , Guanhua Xu , Dongzhi Fu , Weidong Wang , Shengtao Li","doi":"10.1016/j.mtla.2025.102497","DOIUrl":"10.1016/j.mtla.2025.102497","url":null,"abstract":"<div><div>In this paper, a LaCoO<sub>3</sub>/Si (100) film was fabricated using the pulsed laser deposition technique. The surface morphology, chemical states and crystalline of the LaCoO<sub>3</sub> film were characterized by scanning electron microscopy, X-ray powder diffraction and X-ray photoelectron spectroscopy. The dielectric properties of the film were measured using a physical property measurement system (PPMS, Dynacool-9, Quantum Design, US) equipped with an impedance analyzer (Keysight E4990A). A magnetic effect on the dielectric behavior was observed in the LaCoO<sub>3</sub> film. The results reveal that the freezing of dipoles and mobile charge carriers play a crucial role of the magnetic effect on the dielectric behavior in the range of the low temperature and high frequency, which the interfacial polarization play a dominant role in the range of the high temperature and low frequency. The curves of real and imaginary parts of the capacitance were simulated using an equivalent circuit model. Through the introduction of inductance (L), the influence of magnetic fields on dielectric properties was analyzed in detail across varying temperature and frequency conditions. This work not only advances the development of magnetic devices, such as sensors and memory devices, but also provides a viable technique for investigating the physical mechanisms underlying the coupling between magnetism and dielectric polarization.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102497"},"PeriodicalIF":2.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 surface mechanical grinding treatment on the microstructural evolution and mechanical properties of commercially pure titanium 表面机械磨削处理对工业纯钛显微组织演变和力学性能的影响

IF 2.9

Materialia Pub Date : 2025-08-01 DOI: 10.1016/j.mtla.2025.102506

B. Dhakal, S.K. Basantia, S. Chandrakar, N.P. Gurao

{"title":"Effect of surface mechanical grinding treatment on the microstructural evolution and mechanical properties of commercially pure titanium","authors":"B. Dhakal, S.K. Basantia, S. Chandrakar, N.P. Gurao","doi":"10.1016/j.mtla.2025.102506","DOIUrl":"10.1016/j.mtla.2025.102506","url":null,"abstract":"<div><div>The evolution of microstructure and mechanical properties of commercially pure titanium subjected to surface mechanical grinding treatment has been investigated to decipher the underlying deformation mechanisms of gradient structure formation during SMGT. SMGT specimens demonstrated obvious grain refinement and an exceptionally increased fraction of low-angle grain boundaries as well as a multi-banded gradient structure with a heterogeneous twin structure. The SMGT process resulted in the formation of a 1000 µm thick gradient structure layer on both sides showing a significant improvement (BM: 164 HV; surface MH: 265 HV improved by 62 %; sub-surface MH: 309 HV improved by 88 %) in microhardness at the surface and sub-surface region, accompanied by a gradual decrease to the center of the specimen. Tensile testing of the SMGT specimens shows a 33 % (BM YS: 327 MPa; SMGT YS: 436 MPa) increase in the yield strength and a 31 % (BM UTS: 392 MPa; SMGT UTS: 514 MPa) increase in UTS with a significant reduction in ductility compared to the virgin sample. The mixed fracture modes (ductile fracture in CG/ML layer; brittle fracture in GS layers) observed in fractographic results suggest the stress-strain partitioning, gradual transition of mechanical properties throughout the gradient thickness, and complex interactions between different banded regions of the sample with heterogeneous microstructure. The strengthening and microstructural evolutions observed in this investigation are collectively attributed to SMGT-induced plastic deformation, compressive residual stress, grain refinement, increased fractions of LAGBs, and cDRX (continuous dynamic recrystallization) facilitated by localized heating (due to sliding friction of tool and specimen).</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102506"},"PeriodicalIF":2.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Releasing the restriction of equal partition-coefficient in Trivedi-Magnin-Kurz eutectic growth model 解除了Trivedi-Magnin-Kurz共晶生长模型中等配分系数的限制

IF 2.9

Materialia Pub Date : 2025-08-01 DOI: 10.1016/j.mtla.2025.102504

Y. Bai, N. Wang

{"title":"Releasing the restriction of equal partition-coefficient in Trivedi-Magnin-Kurz eutectic growth model","authors":"Y. Bai, N. Wang","doi":"10.1016/j.mtla.2025.102504","DOIUrl":"10.1016/j.mtla.2025.102504","url":null,"abstract":"<div><div>The Trivedi-Magnin-Kurz (TMK) model of eutectic growth extended the Jackson-Hunt (JH) model from the case where the solute Peclet number is small to that where it is high. Nevertheless, the limitation of <span><math><mrow><msub><mi>k</mi><mi>α</mi></msub><mo>=</mo><msub><mi>k</mi><mi>β</mi></msub></mrow></math></span> (<span><math><msub><mi>k</mi><mi>α</mi></msub></math></span> and <span><math><msub><mi>k</mi><mi>β</mi></msub></math></span> are equilibrium partition coefficients of two eutectic phases) still persists. Although several efforts have been made to overcome it, the analytic relaxation of this limitation remains unsolved. In this work, we have analytically alleviated this restriction to the general case where <span><math><mrow><msub><mi>k</mi><mi>α</mi></msub><mi>≠</mi><msub><mi>k</mi><mi>β</mi></msub></mrow></math></span>. The results based on the two cases have been obtained, and their impacts on the scaling law of eutectic growth have been determined. It is shown that if <span><math><mrow><msub><mi>k</mi><mi>α</mi></msub><mi>≠</mi><msub><mi>k</mi><mi>β</mi></msub></mrow></math></span>, taking either <span><math><msub><mi>k</mi><mi>α</mi></msub></math></span> or <span><math><msub><mi>k</mi><mi>β</mi></msub></math></span> in the TMK model will lead to deviations. The greater the difference between <span><math><msub><mi>k</mi><mi>α</mi></msub></math></span> and <span><math><msub><mi>k</mi><mi>β</mi></msub></math></span>, the more significant the deviation, especially when one of the partition coefficients is 0. The present treatment has been applied to the eutectic growth of Al-Cu alloy, and it is demonstrated that the theoretical results are more in line with the experimental data compared to those of the TMK model. The current modification is applicable when the non-equilibrium effect is presented.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102504"},"PeriodicalIF":2.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Mg content on the aging behaviour and tensile properties of squeeze-cast Al-7Si-xMg alloys (x = 0–0.8 wt. %) Mg含量对挤压铸造Al-7Si-xMg合金时效行为和拉伸性能的影响（x = 0-0.8 wt. %）

IF 2.9

Materialia Pub Date : 2025-08-01 DOI: 10.1016/j.mtla.2025.102508

Karthik Kumar , L. Hughes , U. Mahmud , Y.L. Chiu , I.P. Jones , R.Lakshmi Narayan , Jayant Jain

{"title":"Effect of Mg content on the aging behaviour and tensile properties of squeeze-cast Al-7Si-xMg alloys (x = 0–0.8 wt. %)","authors":"Karthik Kumar , L. Hughes , U. Mahmud , Y.L. Chiu , I.P. Jones , R.Lakshmi Narayan , Jayant Jain","doi":"10.1016/j.mtla.2025.102508","DOIUrl":"10.1016/j.mtla.2025.102508","url":null,"abstract":"<div><div>The present study investigates the effect of Mg addition on the aging and tensile behaviour of squeeze cast Al-7Si-(x)Mg alloys (<em>x</em> = 0–0.8 wt. %). The results show that increasing Mg content leads to a significant enhancement in the peak hardness of the alloys, with the maximum hardness of 149 HV observed for the Al-7Si-0.8Mg alloy after aging for 10 h. Additionally, the study reveals that Mg addition delays the aging kinetics, likely due to the interplay between the optimized number density and size of the precipitates, which require longer aging times to reach their optimal size for maximum strengthening. The tensile strength of the alloys increases with higher Mg content, with the peak-aged Al-7Si-0.8Mg alloy achieving a tensile strength of 337 MPa. The increase in hardness and strength with increasing Mg addition is attributed to the higher number of Mg<sub>2</sub>Si precipitates formed during aging which hinder dislocation movement. The yield strength of all alloys was predicted using the standard strengthening formula, showing that precipitation strengthening contributes the maximum to the overall yield strength for all the alloys, followed by solid solution strengthening. The present study also reveals the presence of both the βʺ and the β precipitates in the peak-aged samples, suggesting a combined strengthening effect from both precipitates.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102508"},"PeriodicalIF":2.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144764046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Amorphous complexion-aided sintering enables scalable processing of bulk nanocrystalline Cu-Zr with high strength and compressive plasticity 非晶态配位辅助烧结使大块纳米晶Cu-Zr具有高强度和抗压塑性

IF 2.9

Materialia Pub Date : 2025-07-31 DOI: 10.1016/j.mtla.2025.102510

Esther C. Hessong , Tianjiao Lei , Brandon Fields , Raphael Pierre Thiraux , Brad L. Boyce , Timothy J. Rupert

{"title":"Amorphous complexion-aided sintering enables scalable processing of bulk nanocrystalline Cu-Zr with high strength and compressive plasticity","authors":"Esther C. Hessong , Tianjiao Lei , Brandon Fields , Raphael Pierre Thiraux , Brad L. Boyce , Timothy J. Rupert","doi":"10.1016/j.mtla.2025.102510","DOIUrl":"10.1016/j.mtla.2025.102510","url":null,"abstract":"<div><div>Nanocrystalline alloys can have exceptional strengths, yet due to limited microstructural stability it is difficult to fabricate bulk pieces through traditional processing routes that retain nanosized grains. In this study, centimeter-sized Cu-Zr alloy pellets were fabricated via a simple and improved powder metallurgy processing route. Different consolidation temperatures and times were employed to investigate the effect of amorphous grain boundary complexions on densification and the resulting mechanical properties. Bulk compression tests were carried out, with the samples that were hot pressed at 900 °C for 10 h exhibiting an excellent combination of average yield strength of 722 ± 45 MPa and average failure strain of 25.3 ± 2.4 %. Therefore, we find that a powder processing route which enables amorphous complexion-assisted sintering leads to samples that (1) reach full density without requiring quenching treatments or other complex processing, (2) demonstrate appreciable plasticity, and (3) have strength that competes with commercially available high-strength Cu alloys.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"43 ","pages":"Article 102510"},"PeriodicalIF":2.9,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the nature of variant selection along build direction in additively manufactured Ti-6Al-4V walls 增材制造Ti-6Al-4V壁沿构筑方向变异选择的性质

IF 2.9

Materialia Pub Date : 2025-07-27 DOI: 10.1016/j.mtla.2025.102500

Vikrant Saumitra , Avinash Gonnabattula , V. Anil Kumar , Anand K Kanjarla

{"title":"On the nature of variant selection along build direction in additively manufactured Ti-6Al-4V walls","authors":"Vikrant Saumitra , Avinash Gonnabattula , V. Anil Kumar , Anand K Kanjarla","doi":"10.1016/j.mtla.2025.102500","DOIUrl":"10.1016/j.mtla.2025.102500","url":null,"abstract":"<div><div>Microstructures in additively manufactured (AM) Ti-6Al-4V components result from a complex interplay between several competing factors such as thermal gradients, cooling rates, and repeated thermal cycles. As a result, microstructures vary significantly along the build direction. While several studies reported the variations in microstructure along the build direction in terms of grain size, morphology, and crystallographic texture, the changes in variant selection (VS), resulting from the phase transformation, along the build direction have not been reported. In this work, we report on the VS along the build direction in two slender walls of Ti-6Al-4V produced using Laser-Powder Bed Fusion (L-PBF) and Wire Laser-Direct Energy Deposition (L-DED) processes. We show that while both L-DED and L-PBF samples exhibited a decline in VS throughout the build, the underlying mechanisms responsible are different. We analyzed the variant clusters in detail and observed that the type and resulting intervariant boundaries depend on the process. L-DED predominantly favored Type II (60°/⟨11¯20⟩) intervariant boundaries, along with Cluster 1 variants, whereas L-PBF samples exhibited a preference for Type IV (63.26°/⟨10 5 5 ¯3⟩) boundaries and Cluster 2 variants. Furthermore, it is shown that the presence of primarily facilitated massive transformation (<em>α</em><sub>m</sub>) in L-DED samples has a significant role in variant selection.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102500"},"PeriodicalIF":2.9,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strength and electrical conductivity of Al composites with nanocrystalline W alloy reinforcements: Experiments and modeling 纳米晶W合金增强铝复合材料的强度和导电性：实验和建模

IF 2.9

Materialia Pub Date : 2025-07-27 DOI: 10.1016/j.mtla.2025.102501

D. Mohanta , A.K. Chaubey , M. Mukherjee , S. Gollapudi

引用次数: 0

A new approach in pulsed laser deposition of VO2 (M1)-VO2 (B) nanocomposite thin films 脉冲激光沉积VO2 (M1)-VO2 (B)纳米复合薄膜的新方法

IF 2.9

Materialia Pub Date : 2025-07-25 DOI: 10.1016/j.mtla.2025.102498

Slimane Lafane , Mokded Bachani , Samira Abdelli-Messaci

{"title":"A new approach in pulsed laser deposition of VO2 (M1)-VO2 (B) nanocomposite thin films","authors":"Slimane Lafane , Mokded Bachani , Samira Abdelli-Messaci","doi":"10.1016/j.mtla.2025.102498","DOIUrl":"10.1016/j.mtla.2025.102498","url":null,"abstract":"<div><div>Vanadium dioxide (VO<sub>2</sub>) is a material that has garnered significant attention owing to its unique properties of its insulator-to-metal phase transition (IMT). VO<sub>2</sub> can exist in different polymorphic phases, each with distinct properties. The coexistence of VO<sub>2</sub> (M1) and VO<sub>2</sub> (B) phases has attracted increasing interest due to their impacts on the IMT. Further, films containing mixed M1 and B phases are of particular interest for technological applications. In the present study, we employed pulsed laser deposition to produce mixed VO<sub>2</sub> (M1) and VO<sub>2</sub> (B) nanocomposite films on glass substrates. This was accomplished by exploring the target-substrate distance. Our findings indicate that increasing the deposition distance results in a transition from a solely VO<sub>2</sub> (M1) phase to a composite phase that includes both VO<sub>2</sub> (M1) and VO<sub>2</sub> (B). This transition is associated with improvements conductivity, infrared reflectivity, and the symmetry of the hysteresis loop, while maintaining the essential features of the phase transition, such as hysteresis width, contrast, and sharpness, which are related to the improvement of structural properties. This observation stands in contrast to earlier studies that suggested a reduction in the IMT strength. Accordingly, our study provides important perspectives that can greatly improve the practical application of VO<sub>2</sub>.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"42 ","pages":"Article 102498"},"PeriodicalIF":2.9,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Percolation network-enabled bismuth ferrite nanocomposites as a Faraday cage 作为法拉第笼的渗透网络激活铋铁氧体纳米复合材料

IF 3

Materialia Pub Date : 2025-07-23 DOI: 10.1016/j.mtla.2025.102496

Sanjeev Patil , Abishek Kumar , Parasuraman Swaminathan

引用次数: 0