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Ti48Zr20Nb12Cu5Be15內(nèi)生相非晶合金壓縮性能研究
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1.北京理工大學(xué);2.北京理工大學(xué)材料學(xué)院

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TG146.4

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Research on Compression Properties of Ti48Zr20Nb12Cu5Be15 in-situ crystal phase Amorphous Alloy
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Beijing Institute of Technology

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    摘要:

    摘 要: 采用銅模噴鑄法成功制備出內(nèi)含β-Ti(Zr,Nb)晶體相的Ti48Zr20Nb12Cu5Be15內(nèi)生相非晶合金，在室溫環(huán)境下對(duì)其進(jìn)行準(zhǔn)靜態(tài)和動(dòng)態(tài)壓縮力學(xué)性能測(cè)試，結(jié)合S-4800型掃描電鏡(SEM)對(duì)壓縮試樣斷口進(jìn)行觀察，并對(duì)不同應(yīng)變率下的力學(xué)性能進(jìn)行對(duì)比。結(jié)果表明：內(nèi)生相非晶合金的結(jié)構(gòu)為非晶基體和在非晶基體上均勻分布著的β-Ti(Zr,Nb)晶體相組成。Ti48Zr20Nb12Cu5Be15內(nèi)生相非晶合金在準(zhǔn)靜態(tài)壓縮時(shí)，隨應(yīng)變率的增加抗壓強(qiáng)度有明顯的提高，存在應(yīng)變率硬化現(xiàn)象，表現(xiàn)出與一般非晶合金體系不同的應(yīng)變率效應(yīng)；在動(dòng)態(tài)壓縮條件下，動(dòng)態(tài)抗壓強(qiáng)度隨著應(yīng)變率的提高也有較明顯的增加，表現(xiàn)為應(yīng)變率硬化效應(yīng)。由于內(nèi)生相非晶合金在動(dòng)態(tài)壓縮條件下的絕熱溫升效應(yīng)和非晶的碎化，導(dǎo)致在室溫條件下Ti48Zr20Nb12Cu5Be15內(nèi)生相非晶合金的動(dòng)態(tài)壓縮抗壓強(qiáng)度和應(yīng)變低于準(zhǔn)靜態(tài)壓縮抗壓強(qiáng)度和應(yīng)變。

    Abstract:

    The Ti48Zr20Nb12Cu5Be15 amorphous alloy with in-situ ?-Ti（Zr,Nb）crystal phase was prepared by copper mould injection casting. The mechanical behavior was systematically investigated under both quasi-static and dynamic compression at room temperature. Microstructure investigations were conducted by scanning electron microscopy, the result showed that the Ti48Zr20Nb12Cu5Be15 amorphous alloy is amorphous matrix and the ?-Ti (Zr,Nb) crystal phase uniformly distributed in the matrix. The fracture stress increased with increasing strain rate, revealing strain rate hardening effect for the Ti48Zr20Nb12Cu5Be15 in-situ crystal phase amorphous alloy under individual quasi-static and dynamic compression at room temperature. It was also found that the adiabatic temperature rising and the fragment of the amorphous alloys existed on dynamic compression, leading to the fracture stress and the fracture strain during dynamic compression were much lower than that during quasi-static compression at room temperature.

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引用本文

沈永華,程煥武,薛云飛,王本鵬,陳為為,陳文佳,王魯,劉娟. Ti48Zr20Nb12Cu5Be15內(nèi)生相非晶合金壓縮性能研究[J].稀有金屬材料與工程,2016,45(1):92~96.[shenyonghua, chenghuanwu, xueyunfei, wangbenpeng, chenweiwei, chenwenjia, wanglu, liujuan. Research on Compression Properties of Ti48Zr20Nb12Cu5Be15 in-situ crystal phase Amorphous Alloy[J]. Rare Metal Materials and Engineering,2016,45(1):92~96.]
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  • 收稿日期:2014-01-21
  • 最后修改日期:2014-03-13
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  • 在線發(fā)布日期: 2019-01-04
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