Comparison of Aluminum Based Alloys Reinforced with Intermetallic Developed by Powder Metallurgy and Arc Melting Routes

IF 0.3 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Soldagem & Inspecao Pub Date : 2019-01-01 DOI:10.1590/0104-9224/si24.19

Syeda Ammara Batool, A. Wadood, M. A. U. Rehman

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引用次数: 4

Abstract

In this work, Al-Ti alloys were prepared using metallic powders of Al and Ti via Powder Metallurgy (PM) and Arc Melting (AM) route. Four chemical compositions including pure aluminum were studied. Metallic powders were mixed with three compositions, Al-5Ti, Al-10Ti and Al-10Ti-2SiC. All the compositions were in atomic percentage. In case of PM, samples were pressed uniaxially at 170 MPa to fabricate 10 mm diameter compacts followed by pressure-less sintering at 620°C under argon atmosphere for 4 hr. Pure Al showed densification up to 96% whereas sample with 5 at.% Ti decreased in densification to 90%. For samples with 10 at.% of Ti and with 2 at.% SiC, densification values were 92% and 93%, respectively. In the case of AM method, the process was carried out under vacuum in Argon atmosphere followed by homogenization at 600°C for 1 hr. The resulting microstructure and composition of samples were analyzed. X-ray diffraction (XRD) results confirmed the formation of TiAl3 intermetallic phase in the alloy. The mechanical test used to assess samples performance was hardness. Hardness results showed a strong increase in hardness with increasing Ti contents and SiC addition for both types of samples. The developed Al-Ti and Al-Ti-SiC alloy exhibit better hardness properties and have the potential to be used for light-weight materials applications. Key-words: Arc melting; Powder metallurgy; Intermetallics; Phase constitution.

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粉末冶金法和电弧熔炼法制备金属间化合物增强铝基合金的比较

采用粉末冶金(PM)和电弧熔炼(AM)两种方法，制备了Al和Ti合金。研究了包括纯铝在内的四种化学成分。用Al-5Ti、Al-10Ti和Al-10Ti- 2sic三种成分混合金属粉末。所有成分都以原子百分数表示。在粉末冶金的情况下，样品在170 MPa的单轴压力下制成直径10 mm的压坯，然后在620℃的氩气气氛下无压烧结4小时。纯铝致密化率达96%，而含5at的铝致密化率达96%。% Ti在致密化过程中下降到90%。对于含有10 at的样品。%的Ti和2at。% SiC，致密化值分别为92%和93%。在AM法中，该过程在氩气气氛中真空进行，然后在600°C下均质1小时。分析了试样的显微组织和成分。x射线衍射(XRD)结果证实了合金中TiAl3金属间相的形成。用于评估样品性能的力学试验是硬度。硬度结果表明，随着Ti含量和SiC添加量的增加，两种样品的硬度均有明显提高。所研制的Al-Ti和Al-Ti- sic合金具有较好的硬度性能，具有应用于轻量化材料的潜力。关键词:电弧熔炼;粉末冶金;金属间化合物;阶段的宪法。

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来源期刊

Soldagem & Inspecao 工程技术-冶金工程

CiteScore

1.00

自引率

16.70%

发文量

审稿时长

12 weeks

期刊介绍： The Journal Soldagem & Inspeção (S&I) js a techno-scientific journal created in 1995. Printed issues of this journal are distributed free of charge to libraries in Brazil, Latin America and the Iberian Peninsula. It has been printed regularly every quarter since September, 2002, and, since the beginning of 2007, its electronic version is available in the address: (http://www.abs-soldagem.org.br/s&i/). The journal is sponsored by the Brazilian Welding Association (ABS). Since its creation several well known professionals working in welding contributed with the Journal Soldagem & Inspeção and its editorial board crosses the Brazilian borders. During its evolution the Journal received ta special contribution from the Editors-in-chief : Ronaldo Paranhos, Américo Scoti, Paulo Modenesi e Alexandre Bracarence. Since January 2012 the Editor-in-chief is Ana Sofia C. M. D’Oliveira, Full professor at Universidade Federal do Paraná (UFPR) . Her work focus mainly on Hardfacing and Physical Metallurgy. The jornal Soldagem & Inspeção also counts with 10 Associate Editors and a fix Editorial board of referees. short-term (Ad Hoc) referees can be invited to evaluate some papers submitted to the journal. The Soldagem & Inspeção journal is the scientific divulgation channel of the Brazilian Welding Association (ABS). It aims to publish original papers related to the scientific and technological development of welding, inspection, and related fields. Review papers or letters on current and controversial subjects are also published in the Journal. Its abbreviated title is Soldag. insp. (Impr.), which should be used in bibliographies, footnotes and bibliographical references and strips.