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A performance comparison of additive manufactured creep-resistant superalloys 添加剂制造抗蠕变高温合金的性能比较
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-03-13 DOI: 10.1080/13621718.2023.2187925
Will James, S. Ganguly, G. Pardal
Creep-resistant nickel, cobalt based superalloys, selected for a high-speed flight application, deposited using Wire + Arc Additive Manufacturing (WAAM), was reported. Three different alloys, Haynes 188, Inconel 718, and Rene 41, were deposited, and tested for their high-temperature tensile properties, and the results compared with wrought data. The alloys were tested from ambient temperature to 1000°C in their as-deposited condition and after undergoing industry standard age-hardening and solutionising heat-treatments, to down select the best performing alloy under two different processing conditions. The mechanical strength of the alloys fell short of the maximum achievable in wrought condition. Precipitation-strengthened alloys, Inconel 718 and Rene 41 were found to have underperformed the most significantly, whereas solid-solution-strengthened Haynes 188 suffered the least due to WAAM.
报道了一种用于高速飞行应用的抗蠕变镍、钴基高温合金,该合金采用线+电弧增材制造(WAAM)沉积。沉积了三种不同的合金,Haynes 188, Inconel 718和Rene 41,并测试了它们的高温拉伸性能,并将结果与变形数据进行了比较。合金在室温至1000℃的沉积状态下进行测试,并经过工业标准的时效硬化和固溶热处理,以确定在两种不同工艺条件下性能最佳的合金。合金的机械强度达不到锻造条件下可达到的最大强度。析出强化合金,Inconel 718和Rene 41表现不佳,而固溶强化Haynes 188受WAAM影响最小。
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引用次数: 1
Effect of heat treatments on Inconel 625 fabricated by wire and arc additive manufacturing: an in situ synchrotron X-ray diffraction analysis 热处理对线弧增材Inconel 625的影响:同步加速器X射线衍射原位分析
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-03-13 DOI: 10.1080/13621718.2023.2187927
T. A. Rodrigues, Francisco Werley, Cipriano Farias, J. Avila, E. Maawad, N. Schell, T. Santos, J. P. Oliveira
ABSTRACT The effect of heat treatments on wire and arc additively manufactured Inconel 625 parts was investigated using in situ synchrotron X-ray diffraction and hardness testing. As-built samples revealed the presence of a γ-matrix with precipitation of γ′, γ′′ and MC carbides. When heat treated at 750°C for 4 h, γ′′ phase precipitated increasing the hardness by 5%. In situ X-ray observations revealed that heat treating at 870°C for 1 h resulted in δ-phase precipitation. Two different second-stage temperatures were tested (1050°C and 1150°C), which dissolved the δ-phase while MC carbides formed upon cooling. The second stage at 1150°C had a higher deleterious effect than the one performed at 1050°C due to extensive grain growth.
采用同步x射线衍射和硬度测试技术,研究了热处理对金属丝和电弧增材制造的Inconel 625零件的影响。建立的样品显示存在γ-基体,并析出γ′,γ′和MC碳化物。在750℃下热处理4h,析出γ”相,硬度提高5%。原位x射线观察表明,在870°C下热处理1 h可产生δ相析出。两种不同的第二阶段温度(1050°C和1150°C)使δ相溶解,同时冷却形成MC碳化物。由于晶粒生长广泛,1150℃下的第二阶段比1050℃下的有害影响更大。
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引用次数: 5
The interface microstructure and phase constitution of Nb/316L composite plates fabricated by explosive welding 爆炸焊接Nb/316L复合材料板的界面组织和相组成
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-03-13 DOI: 10.1080/13621718.2023.2187546
Hanliang Liang, N. Luo, Yan-Liang Chen, Yingkang Yao, Jinxiang Wang, Li Jiang, Xiang Chen
ABSTRACT Niobium has a reputation for its superior superconducting, high strength and corrosion resistance at elevated temperatures. In this work, the explosive welding technique was successfully performed to join Nb/316L dissimilar metals. To reveal the phase constitution and texture distribution at the joining interface, the EBSD test was carried out. It was concluded that an irregular large wavy structure of fine crystal, sub-grains and twin structures was formed. In addition, the recrystallised structures, substructures, deformed structures and local internal stress at the joining interface were attributed to severe plastic deformation and rapid solidification of liquid metal. Furthermore, six different deformation textures and recrystallisation textures were confirmed at the joining interface due to severe plastic deformation and dynamic recrystallisation.
摘要铌以其优异的超导性、高强度和耐高温腐蚀性而闻名。在本工作中,成功地将爆炸焊接技术用于连接Nb/316L异种金属。为了揭示接合界面处的相组成和织构分布,进行了EBSD测试。结果表明,形成了由细晶、亚晶粒和孪晶结构组成的不规则大波浪结构。此外,再结晶组织、亚组织、变形组织和连接界面处的局部内应力归因于液态金属的严重塑性变形和快速凝固。此外,由于严重的塑性变形和动态再结晶,在连接界面处确认了六种不同的变形织构和再结晶织构。
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引用次数: 0
Effect of interlayer time interval on residual stress distribution in Ti6Al4V alloy manufactured by laser powder bed fusion 层间时间间隔对激光粉末床熔合Ti6Al4V合金残余应力分布的影响
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-03-02 DOI: 10.1080/13621718.2023.2184105
L. Novotný, M. Béreš, B. Carpentieri
A finite element is developed to study the transient temperature fields and mechanical response during laser powder bed fusion processing and multi-layer deposition of a Ti6Al4V powder. Two different powder deposition time intervals are examined. The results of our analysis reveal that short-time interlayer intervals lead to a reduction of residual von Mises stress in the produced part. A good correspondence between the experimental and numerical results was found.
采用有限元方法研究了Ti6Al4V粉末激光熔床熔化和多层沉积过程中的瞬态温度场和力学响应。研究了两种不同的粉末沉积时间间隔。我们的分析结果表明,短时间的层间间隔会降低生产零件中的残余von Mises应力。实验结果与数值结果吻合良好。
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引用次数: 1
Microstructure and mechanical properties of TiC nanoparticles reinforced 7075 aluminium alloy fabricated by oscillating laser-arc hybrid additive manufacturing 振荡激光-电弧复合增材制造TiC纳米颗粒增强7075铝合金的组织与力学性能
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-03-02 DOI: 10.1080/13621718.2023.2182485
Bingchen Li, Xiangshan Chen, M. Jiang, Shengchong Ma, Zhiyuan Wang, Z. Lei, Yan-bin Chen
In this work, TiC nanoparticles (TiCps) reinforced 7075 aluminium alloy was fabricated via an oscillating laser-arc hybrid additive manufacturing process. To show the beneficial effect of TiCps addition on microstructure and mechanical properties, a conventional 7075 aluminium alloy was also manufactured for comparison. Upon the addition of TiCps, remarkable grain refinement was achieved with a decrease in average grain size from 111.8 to 12.5 µm, and grain boundary segregation was alleviated. It was also found that many secondary phases precipitated at the grain interior in the deposit with TiCps. Owing to the refined microstructure and favourable precipitation, as-deposited 7075 aluminium alloy with TiCps showed enhanced tensile properties of ultimate tensile strengths of 346 and 355 MPa along scanning and build directions.
在本工作中,通过振荡激光-电弧混合增材制造工艺制备了TiC纳米颗粒(TiCps)增强7075铝合金。为了显示添加TiCps对微观结构和机械性能的有益影响,还制造了一种常规的7075铝合金进行比较。添加TiCps后,实现了显著的晶粒细化,平均晶粒尺寸从111.8减小到12.5 µm,晶界偏析得到缓解。还发现,在含TiCps的沉积物中,许多二次相在晶粒内部沉淀。由于细化的微观结构和有利的沉淀,具有TiCps的沉积态7075铝合金显示出增强的拉伸性能,极限拉伸强度分别为346和355 MPa。
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引用次数: 4
Arc additive remanufacturing of a new type of Al–Cu–Ni aviation case: microstructure and high-temperature properties under T6 heat treatment 一种新型Al-Cu-Ni航空壳体的电弧增材再制造:T6热处理下的显微组织和高温性能
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-27 DOI: 10.1080/13621718.2023.2183330
Hongbin Dai, Enyu Zhang, Jian Miao, Sanbao Lin, Song Yu
A new Al–Cu–Ni alloy was repaired by arc additive remanufacturing and T6 heat treatment. The results show that the grain size in the upper part of the weld is slightly larger than that in the lower part, and the whole distribution is uniform without delamination. The orientation of grains in the weld is disordered, and most of them are stable crystal structures with a large angle. The average tensile strength at 300°C is 148.3 MPa, the yield strength is 106.6 MPa and the elongation is 10.5%. δ-Al3CuNi and γ-Al7Cu4Ni increase the strength of grain boundary, and the strength of θ″ and θ′ are dispersed from the α-Al matrix during aging, which are the main reasons for obtaining high-temperature properties.
采用电弧增材再制造和T6热处理对一种新型铝铜镍合金进行了修复。结果表明:焊缝上部晶粒尺寸略大于下部,整体分布均匀,无分层现象;焊缝中晶粒的取向是无序的,大多数是大角度的稳定晶体结构。300℃时的平均抗拉强度为148.3 MPa,屈服强度为106.6 MPa,伸长率为10.5%。δ-Al3CuNi和γ-Al7Cu4Ni提高了晶界强度,θ″和θ′的强度在时效过程中从α-Al基体中分散,这是获得高温性能的主要原因。
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引用次数: 1
Liquation-induced loss of ductility in AA7075 aluminium alloy fusion welds AA7075铝合金熔焊中液化引起的延展性损失
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-27 DOI: 10.1080/13621718.2023.2181559
Alireza Pirjamadi, A. Alikhani, M. Movahedi, M. Pouranvari
This paper investigates the effect of liquation in the partially melted zone (PMZ) on the stress–strain behaviour of the AA7075 arc fusion welds. It is identified that the presence of micro-sized Cu-rich second phases in the initial microstructure of the AA7075 is responsible for constitutional liquation in the PMZ. Although the liquation cracking can be avoided using the proper selection of filler metal, it is demonstrated that the formation of brittle Al2Cu-type intermetallic-containing eutectic structure resulting from non-equilibrium solidification of the liquated grain boundaries can induce a severe loss of ductility in the PMZ. This calls for proper strategies to minimise the grain boundary liquid film thickness to produce a more reliable fusion weld on AA7075 alloy.
研究了部分熔化区液化对AA7075弧焊焊缝应力-应变行为的影响。结果表明,在AA7075的初始组织中,微尺寸富cu第二相的存在是导致PMZ结构液化的主要原因。虽然通过适当选择填充金属可以避免液化开裂,但由于液化晶界的非平衡凝固而形成的脆性al2cu型含金属间共晶组织会导致PMZ中严重的塑性损失。这就需要采取适当的策略来最小化晶界液膜厚度,以在AA7075合金上产生更可靠的熔焊。
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引用次数: 0
Fe–Al intermetallic suppression of dissimilar RSW joints using stainless-steel interlayers 使用不锈钢夹层抑制异种RSW接头的Fe–Al金属间化合物
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-23 DOI: 10.1080/13621718.2023.2176046
Bryan Lara, R. Giorjão, H. Ghassemi-Armaki, A. Ramirez
Austenitic and ferritic stainless-steel interlayers for resistance spot welding of an AlSi-coated 2000MPa UTS press-hardened boron steel and a 6022-T4 aluminium alloy were investigated to improve joint performance. CALPHAD and kinetic-based simulations were explored to determine the effects of Cr on the formation of Fe–Al intermetallic compounds. Selected area diffraction reveals the formation of FeCrAl9 along the interlayer-Al interface and suppresses the formation of FeAl3. The implementation of stainless-steel interlayers significantly improved the mechanical performance of the joint, with the 430 foil condition experiencing a substantial decrease in the Fe–Al intermetallic.
采用奥氏体和铁素体不锈钢为中间体,对alsi涂层2000MPa UTS压硬化硼钢与6022-T4铝合金的电阻点焊进行了研究。研究了CALPHAD和动力学模拟,以确定Cr对Fe-Al金属间化合物形成的影响。选择区衍射显示feal9沿层间al界面形成,并抑制FeAl3的形成。在430箔条件下,Fe-Al金属间质的含量显著降低,不锈钢夹层的加入显著提高了接头的力学性能。
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引用次数: 1
Effect of tool geometry on hook formation and mechanical properties of refill friction stir spot welding in alclad 2A12-T42 aluminium alloy 刀具几何形状对覆层2A12-T42铝合金搅拌摩擦点焊钩形及力学性能的影响
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-21 DOI: 10.1080/13621718.2023.2180203
Yuxuan Li, Guangda Sun, Zili Zhang, Li Zhou, N. Guo, Jihong Dong, Huaxia Zhao
Three sleeve structures (conventional sleeve, threaded sleeve, grooved sleeve) were used for refill friction stir spot welding (RFSSW) of 2A12-T42 aluminium alloy to investigate the effect of sleeve geometry on hook formation and mechanical properties of the joints. The high-pressure area generated during the plunge stage was responsible for the hook formation. Threads and grooves sleeves not only enhanced the mixing effect but inhibited the hook formation by breaking up the alclad layer or promoting the downward material flow, respectively. The welds using a grooved sleeve had the lowest hook height and highest tensile-shear failure load. As the hook height decreased, the upward tendency of crack propagation was suppressed, which confined the propagation paths within the regions of higher hardness.
采用三种套筒结构(常规套筒、螺纹套筒、槽式套筒)对2A12-T42铝合金进行再填充搅拌摩擦点焊,研究了套筒几何形状对接头钩形形成和力学性能的影响。俯冲阶段产生的高压区是形成弯钩的原因。螺纹和凹槽套筒分别通过破坏包铝层或促进材料向下流动,不仅增强了混合效果,而且抑制了钩的形成。使用槽套的焊缝具有最低的钩高度和最高的拉伸剪切破坏载荷。随着钩高度的降低,裂纹扩展的向上趋势被抑制,这将扩展路径限制在较高硬度的区域内。
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引用次数: 0
Enhancing mechanical properties of friction stir welded AZ31 alloys by post-weld compression 焊后压缩提高AZ31合金搅拌摩擦焊接力学性能
IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-02-13 DOI: 10.1080/13621718.2023.2176616
Zhe Liu, Fangge Wu, Bo Feng, Li Liu, C. Dong, Yunqiang Zhao, Bo-xue Song
In this work, the friction stir welded AZ31 joint was processed by a two-step post-weld deformation (i.e. compression at room temperature and an elevated temperature, respectively). The microstructure, texture and mechanical properties were systematically investigated. Profuse extension twins were observed after the first-step cold compression along normal direction, which largely affected the dynamic recrystallisation process during the second-step hot compression. Finally, the grain orientations and their convergence on the weld side were effectively altered, thereby contributing substantially to the enhancement of joint performance. Compared to the original joint, the yield strength, ultimate tensile strength and elongation were improved 64.7%, 20.8% and 52.5%, respectively. The underline strengthening mechanism was discussed by a comprehensive analysis of Schmid factor and geometric compatibility factor.
在这项工作中,搅拌摩擦焊接AZ31接头通过两步焊后变形(即分别在室温和高温下压缩)进行处理。系统地研究了其微观结构、织构和力学性能。在第一步冷压缩后,沿法线方向观察到大量的拉伸孪晶,这在很大程度上影响了第二步热压缩期间的动态再结晶过程。最后,有效地改变了焊缝侧的晶粒取向及其收敛性,从而大大提高了接头性能。与原始接头相比,接头的屈服强度、极限抗拉强度和伸长率分别提高了64.7%、20.8%和52.5%。通过对Schmid因子和几何相容因子的综合分析,探讨了下划线的强化机理。
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引用次数: 0
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Science and Technology of Welding and Joining
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