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基于Ti1100合金的微量元素添加對合金抗氧化性能的影響
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大連理工大學(xué) 三束材料改性教育部重點(diǎn)實(shí)驗(yàn)室 材料科學(xué)與工程學(xué)院,大連理工大學(xué) 三束材料改性教育部重點(diǎn)實(shí)驗(yàn)室 材料科學(xué)與工程學(xué)院,大連理工大學(xué) 三束材料改性教育部重點(diǎn)實(shí)驗(yàn)室 材料科學(xué)與工程學(xué)院,大連理工大學(xué) 三束材料改性教育部重點(diǎn)實(shí)驗(yàn)室 材料科學(xué)與工程學(xué)院,大連理工大學(xué) 三束材料改性教育部重點(diǎn)實(shí)驗(yàn)室 材料科學(xué)與工程學(xué)院,中國核動(dòng)力研究設(shè)計(jì)院 反應(yīng)堆燃料及材料重點(diǎn)實(shí)驗(yàn)室,中國核動(dòng)力研究設(shè)計(jì)院 反應(yīng)堆燃料及材料重點(diǎn)實(shí)驗(yàn)室,桂林電子科技大學(xué),桂林電子科技大學(xué)

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TG146.23

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國家自然科學(xué)基金資助(51171035,51131002),遼寧省自然科學(xué)基金(2015020202)，國家國際科技合作專項(xiàng)（2015DFR60370）和廣西信息材料重點(diǎn)實(shí)驗(yàn)室基金(161002-K)


Effects of minor additions of elements into Ti1100 on elevated oxidation-resistant properties
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Key Laboratory of Materials Modification by Laser,Ion and Electron Beams Ministry of Education,School of Materials Science and Engineering,Dalian University of Technology,Key Laboratory of Materials Modification by Laser,Ion and Electron Beams Ministry of Education,School of Materials Science and Engineering,Dalian University of Technology,Key Laboratory of Materials Modification by Laser,Ion and Electron Beams Ministry of Education,School of Materials Science and Engineering,Dalian University of Technology,Key Laboratory of Materials Modification by Laser,Ion and Electron Beams Ministry of Education,School of Materials Science and Engineering,Dalian University of Technology,Key Laboratory of Materials Modification by Laser,Ion and Electron Beams Ministry of Education,School of Materials Science and Engineering,Dalian University of Technology,Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,,

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    摘要:

    本文利用固溶體合金中的‘團(tuán)簇加連接原子’模型解析了典型高溫近α-Ti合金Ti1100的成分，其團(tuán)簇成分式為[Al-(Ti13.7Zr0.3)](Al0.69Sn0.18Mo0.03Si0.12)。在此基礎(chǔ)上，采用相似元素替代原則設(shè)計(jì)了微量元素Hf、Ta和Nb添加的系列合金成分，即 [Al-(Ti13.7Zr0.15Hf0.15)](Al0.69Sn0.18Si0.1(Mo/Ta/Nb)0.03)。對該系列合金進(jìn)行950 ℃/1 h固溶+560 ℃/6 h時(shí)效處理，然后進(jìn)行組織結(jié)構(gòu)、硬度、抗高溫氧化及電化學(xué)腐蝕性能測試。研究結(jié)果表明，Zr0.15Hf0.15合金與參比合金具有相同片層β轉(zhuǎn)變組織，而在此基礎(chǔ)上Ta和Nb的添加會(huì)使合金中產(chǎn)生大量等軸α組織；但組織的改變對系列合金的顯微硬度影響不大，介于330-370 HV。650 ℃氧化100 h后系列合金均具有較強(qiáng)的抗氧化能力，氧化增重小于1.0 mg/cm2，而在800 ℃氧化100 h后，添加Hf、Ta、Nb元素的合金氧化增重明顯低于Ti1100合金，氧化層厚度為25~27 μm，且氧化層致密，其中[Al-(Ti13.7Zr0.15Hf0.15)](Al0.69Sn0.18Si0.1Ta0.015Nb0.015)合金具有最優(yōu)的抗高溫氧化性能，800 ℃/100 h后的氧化增重僅為2.6 mg/cm2。此外，該系列合金在在3.5 %NaCl溶液中也具有較好的耐蝕性。

    Abstract:

    The present work intevatigated the composition rule of the near-? Ti alloy Ti1100 using a cluster-plus-glue-atom model for solid-solution alloys, and its cluster formula could be expressed as [Al-(Ti13.7Zr0.3)](Al0.69Sn0.18Mo0.03Si0.12). A new series of alloys by adding minor Hf, Ta and Nb with similar elements substititution in equimolar ratio were then designed, being [Al-(Ti13.7Zr0.15Hf0.15)](Al0.69Sn0.18Si0.1(Mo/Ta/Nb)0.03). These alloys were solid-solution-treated at 950 ℃ for 1 h followed by water-quenching, and then aged at 560 ℃ for 6 h. The microstructures, microhardness, oxidation- and corrosion-resistant properties of alloys were measured. The experimental results showed that the alloy with Hf0.15 substitution for Zr0.15 in Ti1100 still exhibits a ?-transformed lamellar microstructure, while the further combinations of Ta and Nb induce a large amount of equiaxed ??grains to form a duplex microstructure. The change of microstructure doesn’t affect the microhardness of alloys, within a range of 330-370 HV. All the designed alloys, as well as the reference Ti1100, possess excellent oxidation-resistant property at 650 ℃, in which all the oxidation weight gains are less than 1.0 mg/cm2. But the results are obviously different at 800 ℃ in comparison with that of Ti1100, which the oxidation weight gains of the designed alloys with Hf, Ta and Nb co-alloying after 100 h are far less than Ti1100, and the widths of the dense oxidation layers are among 25-27??m. The [Al-(Ti13.7Zr0.15Hf0.15)](Al0.69Sn0.18Si0.1Ta0.015Nb0.015) alloy has the best oxidation resistance with a lowest oxidation weight gain of 2.6 mg/cm2. In addition, this series of alloys also have good corrosion resistance in 3.5 %NaCl.

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車晉達(dá),姜貝貝,王 清,董 闖,陳國清,張瑞謙,唐 睿,徐芬,孫立賢.基于Ti1100合金的微量元素添加對合金抗氧化性能的影響[J].稀有金屬材料與工程,2018,47(5):1471~1477.[Che Jinda, Jiang Beibei, Wang Qing, Dong Chuang, Chen Guoqing, Zhang Ruiqian, Tang Rui, Xu Fen, Sun Lixian. Effects of minor additions of elements into Ti1100 on elevated oxidation-resistant properties[J]. Rare Metal Materials and Engineering,2018,47(5):1471~1477.]
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  • 收稿日期:2016-04-21
  • 最后修改日期:2016-05-15
  • 錄用日期:2016-06-12
  • 在線發(fā)布日期: 2018-06-08
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