Acta Metallurgica Sinica-English Letters最新文献

{"title":"Effect of Precipitation Behavior and Deformation Twinning Evolution on the Mechanical Properties of 16Cr–25.5Ni–4.2Mo Superaustenitic Stainless Steel Weld Metals","authors":"Chenghao Liu,&nbsp;Wenchao Dong,&nbsp;Jian Sun,&nbsp;Shanping Lu","doi":"10.1007/s40195-024-01787-w","DOIUrl":"10.1007/s40195-024-01787-w","url":null,"abstract":"<div><p>In the study, three 16Cr–25.5Ni–4.2Mo superaustenitic stainless steel weld metals with C contents of 0.082 wt%, 0.075 wt%, and 0.045 wt%, were prepared to investigate the microstructural evolution and its effect on mechanical behavior. At a C content of 0.082 wt%, the microstructure of weld metal consisted of austenite, <i>M</i>₆C, and <i>M</i>₂₃C₆, where <i>M</i>₆C was the main carbide. The number and average size of the <i>M</i>₆C carbides significantly decreased as the C content decreased. At a C content of 0.045 wt%, only a very small number of <i>M</i>₆C carbides were observed in the weld metal. For the tensile process, the number of deformation twins increased as the C content decreased, which introduced a stronger dynamic Hall–Petch effect, resulting in only a small decrease in the ultimate tensile strength of the weld metal. Meanwhile, the increase in deformation twins significantly enhanced the elongation of the weld metals. For the impact process, the impact energy increased from 204 to 241 J as the C content decreased. The crack initiation resistance was improved due to the reduction in <i>M</i>₆C carbide, which inhibited cracking at the interface of <i>M</i>₆C/matrix. Additionally, the crack propagation resistance was enhanced due to the increase in deformation twins, which consumed more impact energy.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 2","pages":"338 - 352"},"PeriodicalIF":2.9,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361868","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}

{"title":"Fabrication of Zn-0.5Mn-0.05 Mg Micro-Tube with Suitable Strength and Ductility for Vascular Stent Application","authors":"Dongfang Lou,&nbsp;Mingda Zhang,&nbsp;Yuping Ren,&nbsp;Hongxiao Li,&nbsp;Gaowu Qin","doi":"10.1007/s40195-024-01782-1","DOIUrl":"10.1007/s40195-024-01782-1","url":null,"abstract":"<div><p>Biodegradable Zn alloys are a hot topic in the biodegradable vascular stent materials, the study on preparing Zn alloys microtubes for vascular stent is still insufficient and none of the tubes could well meet the mechanical requirement by present. In this study, we fabricate Zn-0.5Mn-0.05 Mg microtube with outer diameter of 3.5 mm and wall thickness of 0.2 mm by five passes three-roller rolling. The mechanical properties of the microtube are 277 ± 2.9 MPa, 330 ± 3.3 MPa and 39.8 ± 5.25% for the yield tensile strength (YTS), ultimate tensile strength (UTS) and break elongation, respectively, which well satisfies the requirements of the vascular stent. The leading factors to the variations of the mechanical property are texture evolution, grain size refinement and microstructure uniformity during the rolling process, and the main deformation mechanisms are twinning and dislocation movement. As a result of the dynamic recrystallization, the grain size decreases obviously and the microstructure gets more uniform as the rolling pass increases. The texture gradually changes from a basal texture &lt; 01 <span>(overline{1 })</span> 0 &gt; ‖ED (extrusion direction) for the as-extruded tube blank to deformation texture &lt; 0001 &gt; ‖RD (rolling direction) and non-basal texture &lt; 02 <span>(overline{2 })</span> 1 &gt; ‖RD for the 5-pass rolled microtube.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 2","pages":"327 - 337"},"PeriodicalIF":2.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362200","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}

{"title":"Effect of Laser Energy Density on Microstructures and Properties of Additively Manufactured AlCoCrFeNi2.1 Eutectic High-Entropy Alloy","authors":"Lingxiao Du,&nbsp;Hang Ding,&nbsp;Yun Xie,&nbsp;Li Ji,&nbsp;Wanbin Chen,&nbsp;Yunze Xu","doi":"10.1007/s40195-024-01783-0","DOIUrl":"10.1007/s40195-024-01783-0","url":null,"abstract":"<div><p>In the present study, AlCoCrFeNi_2.1 eutectic high-entropy alloy (EHEA) has been fabricated by laser melting deposition (LMD). The influence of laser energy density on microstructures, wear resistance and corrosion resistance of the alloy was systematically explored. The results indicate that the AlCoCrFeNi_2.1 EHEA exhibited lamellar eutectic microstructures with alternating FCC and BCC phases. With the increase in laser energy density, the alloy grain size, interlamellar spacing, and volume fraction of the FCC phase increased, while the hardness of the alloy decreased. Meanwhile, the tribological performance of the alloy deteriorated with increasing laser energy density, and the combined effects of abrasive wear and adhesive wear gradually became significant. In addition, increasing laser energy density from 18.2 to 25 J/mm² resulted in the increase in corrosion current density of the AlCoCrFeNi_2.1 EHEA from 6.36 × 10⁻⁸ to 3.02 × 10⁻⁷ A/cm² and the negative shift of corrosion potential from − 211 to − 292 mV (SCE). In summary, reducing laser energy density improved the wear and corrosion performance of the additively manufactured AlCoCrFeNi_2.1 EHEA.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 2","pages":"233 - 244"},"PeriodicalIF":2.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362201","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}

{"title":"Effects of Thermal Aging on the Oxidation Behavior of 316L Austenitic Steel in 600 °C Supercritical Fired Boiler: Mechanism Based on Interface Features","authors":"Tianyi Zhang,&nbsp;Chenjun Yu,&nbsp;Bo Xiao,&nbsp;Ju Liu,&nbsp;Zhongliang Zhu,&nbsp;Naiqiang Zhang","doi":"10.1007/s40195-024-01789-8","DOIUrl":"10.1007/s40195-024-01789-8","url":null,"abstract":"<div><p>The oxidation behavior of 316L austenitic steel after thermal aging process at 600 °C for 6 h was investigated in the supercritical water (600 °C/25 MPa) with 1000 h. Results showed that the grain size and the proportion of high angle grain boundaries (HAGB) increased in the steel after thermal aging process, with the observation of micro-textures. The weight gain rate of the steel after aging process increased, presenting the decreased Cr₂O₃ contain in the oxide layer, which resulted in the increasing diffusion rate of Fe and O ions in oxide layer. The molecular dynamics simulation results confirmed the high oxidation rate in HAGB and micro-textures for the 316L steel after aging process.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 12","pages":"2150 - 2162"},"PeriodicalIF":2.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645608","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}

{"title":"Enhancing the Mechanical Properties Induced by Ta Microalloying in TIG-Welded Ti2AlNb-Based Intermetallic Alloy","authors":"Hao Zhang,&nbsp;Le Zai,&nbsp;Xiaohuai Xue","doi":"10.1007/s40195-024-01784-z","DOIUrl":"10.1007/s40195-024-01784-z","url":null,"abstract":"<div><p>During the tungsten inert gas (TIG) welding process of Ti₂AlNb alloy, high heat input leads to the formation of coarse grains, which are detrimental to the mechanical properties of welded joints. To address this problem, Ta microalloyed welding wires were developed to enhance the strength of the welded joints. The Ta-modified fusion zone (FZ) exhibited a well-defined structure with a smooth, defect-free surface. Systematic analysis of the microstructure evolution and mechanical properties of the welded joints revealed that the Ta element completely dissolves into the FZ. During solidification, a significant constitutional undercooling effect occurs, promoting the columnar-to-equiaxed transition (CET) and reducing grain size from 187.42 to 133.49 μm. Mechanical properties tests indicated that with increased Ta content, the strength of the welded joints initially increased and then decreased. When the Ta content in the welding wire was 1 wt%, the joints showed the best performance, with a tensile strength of 909.36 MPa and an elongation of 1.21%. Compared to the welded samples without Ta, the tensile strength and elongation increased by 153.01 MPa and 0.53%, respectively. Grain refinement and increased dislocation density were the main reasons for the improved mechanical properties. However, excessive Ta content led to significant the intragrain misorientation, increasing the joint’s anisotropy and causing uneven deformation during tensile testing. Therefore, further addition of Ta did not substantially enhance the tensile properties of the joint. Additionally, the paper provides a detailed analysis of the low elongation observed in the joint. After welding, dislocations were neatly arranged in the FZ, forming numerous parallel dislocation walls, leading to local stress concentration and accelerating crack initiation and propagation. Consequently, the elongation at the weld was lower than that of the base metal (BM). This research offers a new approach to improve the mechanical properties of Ti₂AlNb alloy during welding.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 3","pages":"419 - 434"},"PeriodicalIF":2.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40195-024-01784-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521670","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}

{"title":"Springback Behavior and Biocompatibility in β-Type Ti-Mo-O Alloys","authors":"Cheng Ren,&nbsp;Xiaohua Min,&nbsp;Sujie Zhang,&nbsp;Weiqiang Wang","doi":"10.1007/s40195-024-01786-x","DOIUrl":"10.1007/s40195-024-01786-x","url":null,"abstract":"<div><p>Ti-Mo-O alloys were used to analyze the effect of Mo and O contents on the mechanical compatibility and biocompatibility. The bending modulus, bending yield strength and springback ratio of the alloys were evaluated by using three-point bending tests and bending load-unloading tests. The biocompatibility was investigated by the adhesion, proliferation and the alkaline phosphatase (ALP) activity of mouse osteoblast-like cells (MC3T3-E1). The results showed that the bending modulus and bending yield strength first were increased and then decreased with the increase in Mo content, while the springback ratio exhibited an opposite trend to the bending modulus. With the increase in O content, the bending modulus remained almost constant, while the bending yield strength was increased. The springback ratio exhibited a similar trend to the bending yield strength. The in vitro biological experiments showed that the Ti-Mo-O alloys had excellent biocompatibility due to the formed stable oxide films on their surface. With the increase in O and Mo contents, the TiO₂-MoO₂ oxide film became denser. Combining with mechanical compatibility and biocompatibility, the Ti-15Mo-0.2O and Ti-15Mo-0.3O alloys were more suitable for the biomedical application of spinal fixation device.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 2","pages":"313 - 326"},"PeriodicalIF":2.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362107","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}

{"title":"Microstructure and Texture Evolution of Ti65 Alloy during Thermomechanical Processing","authors":"Jian Zang,&nbsp;Jianrong Liu,&nbsp;Qingjiang Wang,&nbsp;Haibing Tan,&nbsp;Bohua Zhang,&nbsp;Xiaolin Dong,&nbsp;Zibo Zhao","doi":"10.1007/s40195-024-01779-w","DOIUrl":"10.1007/s40195-024-01779-w","url":null,"abstract":"<div><p>The initial microstructure of titanium alloy in the <i>α</i> + <i>β</i> phase region is pivotal in dictating the performance of the final products after thermomechanical processing. Microstructures and textures of three rods, each prepared through distinct pretreatments, were systematically analyzed. Morphological analysis reveals that while both thick <i>α</i> platelets and coarse prior <i>β</i> grains impede the spheroidization of lamellar structures, the influence of the former is more pronounced. Variations in <i>α</i> platelet thickness prior <i>β</i> grain size exhibit limited impact on the macro-texture type after deformation and annealing. The proportion of low-angle interfaces between the <i>c</i>-axis of the primary <i>α</i> phase and the &lt; 110 &gt; direction of the prior <i>β</i> grains was elevated in rods with thicker platelets compared to thinner ones.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 1","pages":"107 - 120"},"PeriodicalIF":2.9,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108488","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}

{"title":"Development of Interpenetrating Phase Structure AZ91/Al2O3 Composites with High Stiffness, Superior Strength and Low Thermal Expansion Coefficient","authors":"Zhiqing Chen,&nbsp;Zhixian Zhao,&nbsp;Yiqiang Hao,&nbsp;Xiaoling Chen,&nbsp;Liping Zhou,&nbsp;Jingya Wang,&nbsp;Tao Ying,&nbsp;Bin Chen,&nbsp;Xiaoqin Zeng","doi":"10.1007/s40195-024-01781-2","DOIUrl":"10.1007/s40195-024-01781-2","url":null,"abstract":"<div><p>Mg alloys have the defects of low stiffness, low strength, and high coefficient of thermal expansion (CTE). The composites strategy and its architecture design are effective approaches to improve the comprehensive performance of materials, but the processing difficulty, especially in ceramics forming, limits the control and innovation of material architecture. Here, combined with 3D printing and squeeze infiltration technology, two precisely controllable architectures of AZ91/Al₂O₃ interpenetrating phase composites (IPC) with ceramic scaffold were prepared. The interface, properties and impact of different architecture on IPC performance were studied by experiments and finite element simulation. The metallurgical bonding of the interface was realized with the formation of MgAl₂O₄ reaction layer. The IPC with 1 mm circular hole scaffold (1C-IPC) exhibited significantly improved elastic modulus of 164 GPa, high compressive strength of 680 MPa, and good CTE of 12.91 × 10^–6 K⁻¹, which were 3.64 times, 1.98 times and 55% of the Mg matrix, respectively. Their elastic modulus, compressive strength, and CTE were superior to the vast majority of Mg alloys and Mg based composites. The reinforcement and matrix were bicontinuous and interpenetrating each other, which played a critical role in ensuring the potent strengthening effect of the Al₂O₃ reinforcement by efficient load transfer. Under the same volume fraction of reinforcements, compared to IPC with 1 mm hexagonal hole scaffold (1H-IPC), the elastic modulus and compressive strength of 1C-IPC increased by 15% and 28%, respectively, which was due to the reduced stress concentration and more uniform stress distribution of 1C-IPC. It shows great potential of architecture design in improving the performance of composites. This study provides architectural design strategy and feasible preparation method for the development of high performance materials.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 2","pages":"245 - 258"},"PeriodicalIF":2.9,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362089","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}

{"title":"ZIF-8 Modified Ce–Sol–gel Film on Rebar for Enhancing Corrosion Resistance","authors":"Yanwei Zeng,&nbsp;Peng Xu,&nbsp;Guoqiang Liu,&nbsp;Tianguan Wang,&nbsp;Bing Lei,&nbsp;Zhiyuan Feng,&nbsp;Ping Zhang,&nbsp;Guozhe Meng","doi":"10.1007/s40195-024-01768-z","DOIUrl":"10.1007/s40195-024-01768-z","url":null,"abstract":"<div><p>Chloride-induced corrosion of steel reinforcement is the key factor leading to the degradation of reinforced concrete building durability. Improving the corrosion resistance of oxide scale of rebar has always been a research hotspot in the field of civil engineering materials. A ZIF-8 modified Ce–Sol–gel (ZCS) film was prepared on oxide scale of plain steel rebars by sol–gel method. It is observed that the |<i>Z</i>|_0.01 Hz value of the ZCS film reached 320 kΩ cm², which is about 29 times higher than that of blank rebar in simulated concrete pore (SCP) solution with 0.1 M NaCl. Then, they were inserted into mortar block and curing them in a curing box at <i>T</i> = 20 ± 2 °C and RH = 95 ± 2% for 28 days. Subsequently, these samples were subject to electrochemical impedance spectroscopy in 3.5 wt% NaCl. The |<i>Z</i>|_0.01 Hz value of the rebar with the ZCS film was six times higher than that of the blank rebar after immersing for 20 days, resulting in an overall increase in corrosion resistance for rebar. The results indicated that the modification by ZIF-8 could reduce the porosity of Ce–sol–gel (CS) film and improved the “labyrinth effect” of the film. Additionally, the negative charge on the surface of ZIF-8 in alkaline condition increased the repulsion effect with Cl⁻, significantly reducing the sensitivity of rebar to Cl⁻.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 12","pages":"2121 - 2135"},"PeriodicalIF":2.9,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645721","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}

{"title":"Design of Ultra-Strong As-Cast Titanium Alloy at 600 ℃ by Using Cluster Formula","authors":"Zhihao Zhu,&nbsp;Cenyang Wang,&nbsp;Tianyu Liu,&nbsp;Shuang Zhang,&nbsp;Chuang Dong","doi":"10.1007/s40195-024-01778-x","DOIUrl":"10.1007/s40195-024-01778-x","url":null,"abstract":"<div><p>A Ti–5.4Al–6.4Zr–6.2Sn–0.4Mo–1.6W–0.4Nb–3.2Ta–0.5Si alloy is designed following cluster formula approach that achieves a strength level of 1 GPa at 600 ℃ in the as-cast state, superior to any existing high-temperature Ti alloys. Its composition is formulated by 17 basic units, <i>α</i>-{[Al-Ti₁₂](AlTi₂)}₁₂ + <i>β</i>-{[Al-Ti₁₂Zr₂](Mo_0.125Nb_0.125Ta_0.5W_0.25Sn_1.5Si_0.5)}₅, each unit covering a nearest-neighbor cluster plus a few next-neighbor glue atoms. This design is on the basis of the composition formula of Ti65 alloy, with an enhanced <i>β</i> stability via more Zr, Mo, Nb, Ta, W, Sn, and Si co-alloying. Upon copper-mold pour casting, this alloy shows a good microstructure stability. In tensile testing below at 650 ℃, its <i>α</i> plates thickness is nearly at the same level of 0.2 μm, which is much smaller than 0.7–0.8 μm of Ti65 at the same condition. The changes in volume fraction of <i>β</i> phase are increased by 86%, much less than by 105% in Ti65. Its room-temperature strength reaches the ultra-high-strength level, with an ultimate tensile strength of 1328 MPa and a yield strength of 1117 MPa, with a moderate elongation of 3.8%. At 600 ℃, its ultimate tensile strength of 1017 MPa and yield strength of 936 MPa are superior to those of any existing high-temperature Ti alloys, with an elongation of 7.2%. At 650 ℃, its ultimate tensile strength of 848 MPa still maintains a high level.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 12","pages":"2068 - 2082"},"PeriodicalIF":2.9,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645722","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}