Intermetallics最新文献

{"title":"Design and development of large-diameter Mg-Zn-Ca bulk metallic glass for biomedical applications: A mechanical and corrosion perspective","authors":"Rajesh Kumari rajendran,&nbsp;Divyanshu Aggarwal,&nbsp;Manon Bonvalet Rolland,&nbsp;Cosmin Gruescu,&nbsp;Rajashekhara Shabadi","doi":"10.1016/j.intermet.2024.108520","DOIUrl":"10.1016/j.intermet.2024.108520","url":null,"abstract":"<div><div>Being amorphous, bulk metallic glasses (BMGs) exhibit superior properties compared to their crystalline alloy counterparts. Amorphous materials are preferred for their excellent mechanical and degradation behavior. Among the various elemental combinations, MgZnCa has shown the most promising results, as evidenced by the literature. However, the maximum achievable size of the metallic glasses remains a bottleneck. The current work aims to address this challenge and achieve it splendidly with a systematic methodology by developing larger diameter MgZnCa BMGs through vacuum induction casting using a specially designed copper mold. The optimal composition was formalized for glass formation of the Mg₆₅Zn₃₁Ca₄ system using the CALPHAD technique. As a result, a 6.5 mm diameter glassy alloy was successfully obtained. The XRD and TEM analysis experiments demonstrated a perfect amorphous structure of the developed sample. The anti-corrosion properties of the as-cast glass increased, followed by enhancement in the yield strength and hardness in contrast to the properties of the human bone. Furthermore, the surface wettability analysis showed an adequate surface obtained to promote fibroblast adhesion. In conclusion, the current work represents a notable progress in the fabrication of larger-diameter MgZnCa BMG for biomedical applications, considering that the biggest diameter ever reported in the MgZnCa system was more than a decade ago.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108520"},"PeriodicalIF":4.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423564","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":"In-situ synchrotron high energy X-ray diffraction study on the compressive creep behavior of an extruded Ti-45Al-8Nb-0.2C alloy","authors":"Yuan Ji ,&nbsp;Lin Song ,&nbsp;Ruolan Tong ,&nbsp;Tiebang Zhang","doi":"10.1016/j.intermet.2024.108518","DOIUrl":"10.1016/j.intermet.2024.108518","url":null,"abstract":"<div><div>Wrought high Nb containing (high Nb-TiAl) alloys are potential materials for low pressure turbine blades in aero-engines. The performance and microstructure evolution under high temperature creep condition is of importance to the service stability of these materials. In this study, the internal strain and FWHM evolution of an extruded TNB-based high Nb-TiAl alloy during compressive creep are characterized by in-situ high energy X-ray diffraction (HEXRD) technique for the first time. The compressive creep test was conducted under a constant load of 300 MPa at 900 °C for 10 h in vacuum. The final creep strain is approximately 1.72 %. The microstructure and phase constitution after creep shows little difference from that before creep. Lattice strain analysis shows that γ phase is plastically deformed while the α₂ phase deforms elastically due to the low creep strain. The lattice strain of α₂ grains is dependent upon the deformation of surrounding γ grains. Creep induces dynamic recovery, exerting a softening effect. A high number of dislocations are visible in the γ lamellae while almost no dislocations exist within the α₂ lamellae. α₂ lamellae are partially decomposed and refined via the α₂→γ transformation.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108518"},"PeriodicalIF":4.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423530","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":"Fe-based metallic glass coatings with suppressed cracks and enhanced wear resistance prepared by extreme high-speed laser cladding","authors":"Kai Wang ,&nbsp;Cheng Zhang ,&nbsp;Fengsheng Qu ,&nbsp;Lin Liu ,&nbsp;Xue Liu","doi":"10.1016/j.intermet.2024.108517","DOIUrl":"10.1016/j.intermet.2024.108517","url":null,"abstract":"<div><div>Fe-based metallic glass (MG) coatings draw great attentions due to their excellent wear resistance. The recently developed extreme high-speed laser cladding (EHLC) provides a promising method for their fabrication but limited by the strong tendency to crack. Besides that, the deep insight into the structure evolution and the failure mechanism of the coating is still lacked. Thus, the understanding of the crack origin and the prevention of crack are of great importance. In the present work, Fe-Mo-Cr-Y-C-B MG coatings with adjustable glassy phase content were successfully fabricated by EHLC. The microstructure characterization of the coatings reveals that the cracks is main caused by the hard and brittle nanocrystalline phases precipitations of monoclinic Mo₁₂Fe₂₂C₁₀ and (Fe, Cr)₂₃C₆ carbides in the heat affected zone. Therefore, the cracking of the coatings can be effectively reduced by increasing the glassy phase content. Subsequently, the hardness distribution, wear performance and wear mechanism of the coatings were investigated. The results showed that increasing the glassy phase content can effectively achieve low wear rate. The prepared Fe-Mo-Cr-Y-C-B MG coatings exhibit abrasion loss as low as 3.54·10⁻⁶ mm³ (N m)⁻¹, which is an order of magnitude lower than that of the 45# steel substrate. The wear of the coatings is primarily attributed to the fatigue wear accompanied with slighting oxidative wear. By suppressing the brittle precipitated crystalline phases in the coating, the fatigue wear can be reduced and the wear resistance of the coatings can be improved. The present work provides insights into the crack prevention and were performance improvement of the Fe-based MG coatings prepared by EHLC.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108517"},"PeriodicalIF":4.3,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423529","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":"Unveiling the influence of zirconium on the corrosion behavior of Fe-36Ni Invar alloy","authors":"Qi Wang ,&nbsp;Yanwu Dong ,&nbsp;Zhouhua Jiang ,&nbsp;Zilin Yin ,&nbsp;Yuning Wu ,&nbsp;Haibiao Qing","doi":"10.1016/j.intermet.2024.108519","DOIUrl":"10.1016/j.intermet.2024.108519","url":null,"abstract":"<div><div>The influence of zirconium (Zr) on the corrosion resistance of Fe-36Ni Invar alloy in a 3.5 wt% NaCl solution was systematically investigated. Results indicated that adding Zr promoted the formation of Zr-bearing intermetallic compounds (Ni₇Zr₂ and Ni₂Zr). The phases suppressed the grain growth and numerous dislocations were enriched around the Ni-Zr phases. Unfortunately, the incorporation of Zr into Fe-36Ni Invar alloy impaired corrosion resistance. The marked disparity in Volta potential between the Ni-Zr phases and the matrix signified the existence of micro-galvanic coupling, which caused the matrix to dissolve preferentially. Furthermore, the matrix around the Ni-Zr phases possessed high dislocation density, promoting the emergence of local galvanic corrosion. The introduction of Zr also decreased the protectiveness of the passive film, which was ascribed to the reduction of the thickness of the passive film and the beneficial oxide content in the passive film.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108519"},"PeriodicalIF":4.3,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423528","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":"Strength-ductility mechanism of combined heterostructured CoCrFeMnNi high-entropy alloy prepared by laser heat-treatment process","authors":"Jie Chen ,&nbsp;Chengchi Wang ,&nbsp;Jianjun Ling ,&nbsp;Pengfei Wang ,&nbsp;Jingge Li ,&nbsp;Haizhou Jin ,&nbsp;Yu Cao","doi":"10.1016/j.intermet.2024.108511","DOIUrl":"10.1016/j.intermet.2024.108511","url":null,"abstract":"<div><div>Two types of typical combined heterostructured CoCrFeMnNi high-entropy alloys with superior mechanical properties that evade the strength-ductility trade-off are fabricated using laser heat-treatment process. The lamellar grain structure with relatively high microhardness can hardly be observed due to the short time annealing at low temperature (873 K for 5 min) before laser scanning. The hetero-deformation induced strengthening, as well as the excellent deformation ability of the bottom hard region which can enhance the interaction between nanotwin-dislocation and maintains the large microhardness difference among the soft-hard layers, are the main factors that improve the yield strength of CoCrFeMnNi high-entropy alloy. Moreover, the combined heterostructured structure without lamellar deformed bands is demonstrated to have a relatively better uniform elongation, which is attributed to the stronger deformation ability of the non-recrystallized grains in the bottom hard region and the effective delay of the crack growth. Consequently, the combined heterostructured structure without lamellae is a promising way to simultaneously improve the strength and ductility, which can be efficiently prepared by the laser surface heat-treatment technique.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108511"},"PeriodicalIF":4.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357039","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":"Cu-bearing HHCCI interface combined with first principles calculation and corrosive wear resistance","authors":"Liqiang Gong ,&nbsp;Hejun Du ,&nbsp;Rafik Absi ,&nbsp;Longxiao Huang ,&nbsp;Hanguang Fu","doi":"10.1016/j.intermet.2024.108507","DOIUrl":"10.1016/j.intermet.2024.108507","url":null,"abstract":"<div><div>The corrosive wear resistance of copper-bearing HHCCI was tested through experiments and HRTEM, combined with first-principles calculations to study the atomic structure, interface fracture work, thermodynamic stability, electronic structure and bonding structure of six Fe₃Cr₄C₃(01 <span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 0)/γ-Fe(101) interface models with different termination methods. The HRTEM results show that the interface formed by (01 <span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 0) of M₇C₃-type carbide and (101) of the austenite matrix is a coherent interface. The first principles calculation results show that the interface formed by the Fe₃Cr₄C₃(01 <span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 0)-Cr termination model and the γ-Fe (101)-2 termination model has the highest interface bonding strength. The Fe-end/7Fe-2 interface model is the most stable. Both the interfacial chemical energy and the interfacial elastic energy will affect the overall thermodynamic stability of the Fe₃Cr₄C₃(01 <span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 0)/γ-Fe (101) interface. The fracture work of Fe₃Cr₄C₃(01 <span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 0) and γ-Fe (101) is greater than the corresponding interface adhesion work. Moreover, the fracture work on each terminal end of M₇C₃ along the (01 <span><math><mrow><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> 0) surface is higher than that on each terminal end of γ-Fe along the (101) surface. The failure of HHCCI during corrosive wear may mainly occur in the interface area or the side close to the γ-Fe matrix. The chemical bonds in the Fe-end/7Fe interface are mainly Fe-Fe metal bonds, Fe-Cr metal bonds and some Fe-C polar covalent bonds. The chemical bonds in the Cr-end/7Fe interface are mainly Cr-Fe metal bonds and some Cr-C polar covalent bonds. The chemical bonds in the C-end/7Fe interface are mainly composed of Cr-Fe metal bonds, C-Fe polar covalent bonds and part of C-Cr polar covalent bonds, as a result, each interface exhibits different corrosive wear resistance potentials.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108507"},"PeriodicalIF":4.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423527","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":"Wear behavior of single-layer graphene oxide reinforced CoCrFeNiMn HEA coating by laser cladding","authors":"Fangyan Luo ,&nbsp;Shanshan Wang ,&nbsp;Wenqing Shi ,&nbsp;Zhengye Xiong ,&nbsp;Jiang Huang","doi":"10.1016/j.intermet.2024.108512","DOIUrl":"10.1016/j.intermet.2024.108512","url":null,"abstract":"<div><div>Graphene oxide (Go) has excellent mechanical properties, corrosion resistance, solid lubricant properties, and no biotoxicity. In this study, CoCrFeNiMn coating adding 2 wt% single layer of Go was prepared by laser cladding (LC) on the surface of Q235B. To explore the possibilities of Go as a reinforced powder. It was found that the alcohol stirring method could uniformly mix Go with HEA powder and would not destroy its microstructure. The main phase composition of the coatings does not change, but peaks of oxides and carbides were generated in the coatings. The carbide and oxide generation in the coating was demonstrated by EDS spot scanning. The addition of Go increased the microhardness of the coating by 51.33 %. The average coefficient of friction (COF) of the HEA/Go coating decreased by 16 %, the wear rate decreased by 82.05 %, and the wear weight loss decreased by 77.26 %. Improvement of the wear properties is mainly attributed to the generation of oxide film during friction.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108512"},"PeriodicalIF":4.3,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357038","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 suction casting and thermomechanical processing on the microstructure and martensitic transformation of a TiNiCuNb shape memory alloy","authors":"Jéssica Dornelas Silva ,&nbsp;Mariana Lumi Ichihara Sado ,&nbsp;Leandro Arruda Santos ,&nbsp;Dilson Silva dos Santos ,&nbsp;Vicente Tadeu Lopes Buono","doi":"10.1016/j.intermet.2024.108510","DOIUrl":"10.1016/j.intermet.2024.108510","url":null,"abstract":"<div><div>TiNiCu-based superelastic alloys are promising for use as elastocaloric materials. In this study, we aim to produce a TiNiCuNb alloy with a refined microstructure, adequate Af, and latent heat for room-temperature application. For that, a Ti₄₈Ni₃₈Cu₁₀Nb₄ alloy was produced via arc melting followed by fast-cooling vacuum-suction casting (SC). Compared to the material that was only arc-melted, a refined and more uniform microstructure was obtained. This microstructure exhibited high stability during superelastic cycling and an Af much lower than room temperature. Further thermomechanical processing and heat-treatment (HT) were used to adjust the martensitic transformation (MT) critical temperatures and enthalpy. Increasing Af and enthalpy were observed with increasing HT temperatures. It was discussed that, besides the effect of the development of recovery/recrystallization mechanisms, the Nb content in the TiNi matrix could impact these properties. An Af close to, but smaller than room temperature, was obtained for the alloy heat-treated at 450 °C, with a MT enthalpy of 9.9 J/g.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108510"},"PeriodicalIF":4.3,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357316","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":"Investigation on Microstucutres and properties of ion nitriding layer of Al0.5CoCrFeNiTi0.25 HEAs cladding coating","authors":"Meiyan Li ,&nbsp;Yingjie Wang ,&nbsp;Pu Li ,&nbsp;Lixin Song ,&nbsp;Lihu Guo ,&nbsp;Bin Han","doi":"10.1016/j.intermet.2024.108508","DOIUrl":"10.1016/j.intermet.2024.108508","url":null,"abstract":"<div><div>To investigate the effect of ion nitriding on the microstructures and properties of high entropy alloy coatings, the Al_0.5CoCrFeNiTi_0.25 high entropy alloy coating was fabricated via laser cladding and subsequently subjected to ion nitriding treatment. A comparative analysis were conducted to investigate the phase compositions, microstructures and properties of cladding coatings and ion nitriding layer. Furthermore the formation mechanism of the nitriding layer was studied. XRD results revealed that Al_0.5CoCrFeNiTi_0.25 HEA coatings consisted of duplex FCC and BCC phases, whereas the nitriding layer was composed of high-nitrogen FCC solid solutions and nitrides such as AlN, CrN, Fe₄N and TiN. Following ion nitriding, the surface morphology of nitriding layer presented “cauliflower-like” nitride particles, which became denser with the extended nitriding time. Notably, the microhardness of nitriding layer was approximately four times that of HEA coating, and the wear resistance and the corrosion resistance of cladding coating were improved significantly after ion nitriding. During ion nitriding process, N atoms reacted with the alloying elements to form nitrides, which preferentially deposited at grain boundaries and BCC phases and grew horizontally. As the deposition layer spread across the entire surface, the nitriding mechanism shifted from reaction -controlled to diffusion-controlled, with N atoms diffusing inward to form a diffusion layer with high nitrogen solid solutions. With the prolong of nitriding time from 1h to 12h, the thickness of the diffusion layer increased from 11.77 μm to 96.07 μm.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108508"},"PeriodicalIF":4.3,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357315","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, mechanical and frictional properties of CrCoNi-xNb alloys prepared through powder metallurgy","authors":"Lin Huang ,&nbsp;Jingyu Zhang ,&nbsp;Ke Xiong ,&nbsp;Xiaofeng Wang ,&nbsp;Wei Feng","doi":"10.1016/j.intermet.2024.108496","DOIUrl":"10.1016/j.intermet.2024.108496","url":null,"abstract":"<div><div>Herein, CoCrNi-xNb (x = 0, 1, 3, 5, 7 and 9 wt%, referred to as 0Nb, 1Nb, 3Nb, 5Nb, 7Nb and 9Nb, respectively) alloys were prepared through mechanical alloying and spark plasma sintering techniques. The impact of Nb on the microstructure, mechanical and frictional properties of CoCrNi medium-entropy alloys were investigated. The evolution of the Laves phase (HCP) structure in alloy systems was well predicted using the <span><math><mrow><mover><mrow><mi>M</mi><mi>d</mi></mrow><mo>‾</mo></mover></mrow></math></span> (the average energy level of d-orbitals) criterion. The results show that the structure changed from FCC single-phase (x = 0) to FCC + Laves biphase (x &gt; 0). The alloy's hardness, YS and UTS increase as increase of Nb content increases the volume fraction of the Laves phase and reduces the FCC phase. The increase in hardness is beneficial for improving the wear resistance of the material. The wear mechanism of the alloy changes from abrasive to adhesive wear and then to oxidative wear, and it considerably improves the wear resistance of discs and pins. Thus, CoCrNi-xNb/GCr15 steel pairs are expected to achieve excellent tribological properties under high-temperature conditions. Among them, the mechanical and tribological properties of the CoCrNi-5Nb alloy are excellent. These results show that combining plasticity matrix and intermetallic compounds through powder metallurgy is a viable approach for designing high-strength wear-resistant alloys.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"175 ","pages":"Article 108496"},"PeriodicalIF":4.3,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327236","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}