Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science最新文献

英文中文

Tolerance of Al–Mg–Si Wrought Alloys for High Fe Contents: The Role of Effective Si Al-Mg-Si变形合金对高铁含量的耐受性:有效Si的作用

3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-09-10 DOI: 10.1007/s11661-023-07180-z

J. A. Österreicher, A. R. Arnoldt, S. Gneiger, G. Kunschert

Abstract Aluminum scrap is often contaminated with steel parts, leading to accumulation of Fe in recycled Al alloys. Consequently, low limits for Fe in Al wrought alloys are difficult to meet by recycling without dilution with primary Al. Wrought alloys with a higher tolerance for Fe could help overcome this problem and improve the sustainability of Al wrought products. Here we study the effects of increasing the Fe content in EN AW-6060, 6005A, and 6082 from 0.2 to 0.7 wt pct. The microstructure and mechanical properties of the alloys after extrusion and artificial ageing are compared to the standard alloys. We found that 6082 is more tolerant to above-standard Fe contents than 6005A, which in turn is more tolerant than 6060: the strength of the 6082-based alloy with increased Fe content is comparable to that of standard 6082 and the elongation at break is increased. In contrast, the artificial ageing potential of the 6060-based alloy with more Fe is drastically reduced compared to 6060. This data and literature values show that the effective Si content is a good overall predictor of alloy strength. Effective Si is not bound in AlFeSi-type phases and is available for precipitation hardening. Additional effects of increased Fe levels are discussed.

摘要废铝常被钢件污染，导致铁在再生铝合金中富集。因此，通过不稀释原铝的循环利用，很难满足Al锻造合金中铁的低限值。具有更高铁耐受性的锻造合金可以帮助克服这一问题，提高Al锻造产品的可持续性。本文研究了将EN AW-6060、6005A和6082中Fe含量从0.2 wt %提高到0.7 wt %的效果，并与标准合金进行了挤压和人工时效后合金的组织和力学性能的比较。我们发现6082比6005A更能容忍超标准铁含量，6005A又比6060更能容忍超标准铁含量:随着铁含量的增加，6082基合金的强度与标准6082相当，断裂伸长率也有所提高。相比之下，含铁量较高的6060基合金的人工老化潜力大大降低。这一数据和文献值表明，有效硅含量是合金强度的一个很好的整体预测指标。有效Si不在alfesi型相中结合，可用于沉淀硬化。讨论了铁含量增加的附加效应。

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引用次数: 0

Hot Deformation Behavior and Microstructure of Cast Ni-Based Superalloy IN-100 Based on the Processing Map 基于加工图的铸造镍基高温合金IN-100的热变形行为与显微组织

3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-09-08 DOI: 10.1007/s11661-023-07178-7

Yusaku Hasebe, Takehito Hagisawa, Cheng Yang, Kenta Aoyagi, Kenta Yamanaka, Akihiko Chiba

引用次数: 0

Experimental and Numerical Investigation of a Solidification-Based Aluminum-Cooled Finger Refinement Process From Micro to Macro-Scale 基于凝固的铝冷却手指细化过程从微观到宏观的实验与数值研究

3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-08-03 DOI: 10.1007/s11661-023-07147-0

Danilo Curtolo, Christian Schubert, Alexandre Viardin, Semiramis Friedrich, Moritz Eickhoff, Bernd Böttger, Bernd Friedrich, Herbert Pfeifer, Markus Apel

Abstract The interest in ultra-pure metals is steadily growing due to the increasing demand for these materials in modern technology. To be able to meet the increasing demand in the future, it is necessary to implement more efficient and productive processes. As a fractional crystallization method in this application area, the cooled finger method exhibits higher productivity and lower energy requirements when compared to industry well-established methods like zone melting. In this study, the mechanisms and relevant phenomena crucial for a successful implementation of a cooled finger process were investigated using a multidisciplinary approach. With carefully selected process parameters, we present here an experimental setup with a purification potential of approximately 80 pct. Additional micro- and macro-scale simulations demonstrate that the process is sensitive to parameters such as rotation rate, cooling rate, and temperature gradient within the melt, which explains the difficulty in optimizing this process in practice. An analysis and description of various phenomena that characterize the behavior of the cooled finger process are presented within this multi-scale approach. As a result, these approaches can also be transferred to the description of processes for other metals, opening application areas outside of the purification of aluminum.

由于现代技术对超纯金属的需求不断增加，人们对超纯金属的兴趣正在稳步增长。为了能够满足未来不断增长的需求，有必要实施更有效和更有生产力的流程。作为该应用领域的分式结晶方法，与区域熔化等行业成熟的方法相比，冷却手指法具有更高的生产率和更低的能量需求。在这项研究中，机制和相关现象至关重要的一个成功的实施冷却手指过程进行了研究，采用多学科的方法。通过精心选择的工艺参数，我们在这里展示了一个净化潜力约为80%的实验装置。额外的微观和宏观尺度模拟表明，该工艺对熔体内的旋转速率、冷却速率和温度梯度等参数很敏感，这解释了在实践中优化该工艺的困难。在这种多尺度方法中，分析和描述了表征冷却手指过程行为的各种现象。因此，这些方法也可以转移到其他金属的工艺描述中，开辟了铝净化以外的应用领域。

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引用次数: 0

Publisher Correction: Metallurgical and Materials Transactions A 出版者更正:冶金与材料交易A

3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-06-19 DOI: 10.1007/s11661-023-07102-z

引用次数: 0

Quenching and Partitioning (Q&P) Steel: Alloy Design, Phase Transformation and Evolution of Microstructure 淬火和分配(Q&P)钢:合金设计、相变和微观组织演变

3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-06-06 DOI: 10.1007/s11661-023-07085-x

Sachin Kumar, Shiv Brat Singh

引用次数: 1

Effect of NaCl and Na₂SO₄ on Low Temperature Corrosion of Vapour- and Pack-Aluminide Coated Single Crystal Turbine Blade Alloys CMSX-4 and RR3010. NaCl和Na2SO4对蒸气和包铝涂层单晶涡轮叶片合金CMSX-4和RR3010低温腐蚀的影响。

IF 2.8 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-06-06 DOI: 10.1007/s11661-023-07099-5

J Tjandra, A Ranjan, A K Ackerman, M Appleton, S Pedrazzini

The current work presents a systematic study of two alloy compositions (RR3010 and CMSX-4) and two types of coatings: inward grown (pack) and outward grown (vapour) deposited aluminides, exposed to 98Na₂SO₄-2NaCl mixture. Grit blasting was used on some of the samples, prior to coating, to mimic in-service procedures and remove oxides from the surface prior to coating. Two-point bend tests were then performed on the coated samples, with and without applied salt at 550 °C for 100 hours. Samples were pre-strained at 0.6 pct strain to deliberately pre-crack the coating and then strained at 0.3 pct for the heat treatment. Exposure to 98Na₂SO₄-2NaCl under applied stress of vapour-aluminide coated samples of both alloys, revealed significant coating damage in the form of secondary cracks in the intermetallic-rich inter-diffusion zone, although only CMSX-4 exhibited cracks propagating further into the bulk alloy while RR3010 proved more resistant. The pack-aluminide coating proved more protective for both alloys, with cracks propagating only into the coating and never into the underlying alloy. In addition, grit blasting proved beneficial in reducing spallation and cracking for both types of coating. The findings were used to propose a mechanism based on thermodynamic reactions, to explain the crack width changes through the formation of volatile AlCl₃ in the cracks.

目前的工作对两种合金成分（RR3010和CMSX-4）和两种类型的涂层进行了系统的研究：暴露于98Na2SO4-2NaCl混合物中的向内生长（堆积）和向外生长（气相）沉积的铝化物。在涂覆之前，对一些样品进行了喷砂处理，以模拟在役程序，并在涂覆之前从表面去除氧化物。然后对涂层样品进行两点弯曲试验，在550°C下加盐和不加盐的情况下进行100小时。样品在0.6pct应变下预应变以故意预裂涂层，然后在0.3pct应变进行热处理。在两种合金的蒸镀铝化物样品的外加应力下，暴露于98Na2SO4-2NaCl中，显示出在富含金属间相互扩散区中以二次裂纹形式出现的显著涂层损伤，尽管只有CMSX-4表现出裂纹进一步扩展到大块合金中，而RR3010证明更具抵抗力。事实证明，包铝涂层对这两种合金都有更大的保护作用，裂纹只会扩展到涂层中，而不会扩展到下面的合金中。此外，喷砂处理在减少两种类型涂层的剥落和开裂方面都是有益的。这些发现被用来提出一种基于热力学反应的机制，以解释裂纹宽度通过在裂纹中形成挥发性AlCl3而变化。

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引用次数: 0

Hydrogen-Induced Delayed Fracture in a 1.5 GPa Dual-Phase Steel via Coalescence of Surface and Sub-surface Cracks 1.5 GPa双相钢表面裂纹和次表面裂纹合并的氢致延迟断裂

3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-05-31 DOI: 10.1007/s11661-023-07096-8

Rama Srinivas Varanasi, Motomichi Koyama, Yuki Shibayama, Shuya Chiba, Saya Ajito, Tomohiko Hojo, Eiji Akiyama

引用次数: 1

Molecular Dynamics Simulation and Experimental Verification of Microstructure Evolution of Dual-Phase Ti Alloy During Electroshocking Treatment 双相钛合金触电过程微观组织演变的分子动力学模拟与实验验证

3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-05-30 DOI: 10.1007/s11661-023-07094-w

Lechun Xie, Yupeng Yao, Chang Liu, Yimeng Yu, Fei Yin, Dongsheng Qian, Yanli Song, Liqiang Wang, Lai-Chang Zhang, Lin Hua

引用次数: 0

Electrically Induced Cube ({001} < 100 >) Texture in Non-oriented Electrical Steel 电致立方体({001}<100在)无取向电工钢的织构

3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-05-06 DOI: 10.1007/s11661-023-07064-2

Mengcheng Zhou, Shuyang Qin, Xiaoshan Huang, Xinfang Zhang

引用次数: 0

Growth Kinetics, and Wear and Corrosion Properties of TiC Coatings on Pure Titanium by Carburizing 纯钛表面渗碳TiC涂层的生长动力学及磨损和腐蚀性能

3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science

Pub Date : 2023-05-05 DOI: 10.1007/s11661-023-07069-x

Zhiqi Feng, Yonghua Duan, Mingjun Peng

引用次数: 1

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