玻璃态Cu_(29)Zr_(32)Ti_(15)Al_5Ni_(19)在纳米压入过程中的压痕尺寸效应及应变硬化现象（英文）
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摘要
利用纳米压痕技术对高熵非晶合金Cu_(29)Zr_(32)Ti_(15)Al_5Ni_(19)分别在载荷控制模式、连续刚度模式和循环加载模式下进行了研究。该合金在纳米压入过程中会发生pop-in现象,且载荷大小比加载速率对pop-in现象的影响更大。当载荷超过40 mN时,即使采用高达5 mN/s的加载速率仍然可以观察到pop-in现象。该合金存在压痕尺寸效应,其测试纳米硬度随载荷的增大而下降,其Meyer指数(n)小于2。压入过程中的能量耗散分数(E_d)在54%～60%之间变化。循环加载测试结果显示该合金加工硬化效应明显。
High entropy bulk metallic glass(HE-BMG)Cu_(29)Zr_(32)Ti_(15)Al_5Ni_(19) was investigated by a nanoindentation method in load-controlled,continuous stiffness measurement(CSM)and cyclic loading modes.The results show that pop-in event occurs in this alloy during nanoindentation.The applied load has a greater influence on the pop-in events than the loading rate.When the applied load is larger than 40 mN,obvious pop-in events can be observed in the loading curves even at high loading rates up to 5 mN/s.Indentation size effect exists in this alloy,as confirmed by a decrease in hardness with increasing the indentation load and a Meyer’s index n less than 2.The fraction of energy dissipated during indentation(E_d)changes within the range of54%～60%.Cyclic loading tests reveal an obvious hardening effect.
High entropy bulk metallic glass(HE-BMG)Cu_(29)Zr_(32)Ti_(15)Al_5Ni_(19) was investigated by a nanoindentation method in load-controlled,continuous stiffness measurement(CSM)and cyclic loading modes.The results show that pop-in event occurs in this alloy during nanoindentation.The applied load has a greater influence on the pop-in events than the loading rate.When the applied load is larger than 40 mN,obvious pop-in events can be observed in the loading curves even at high loading rates up to 5 mN/s.Indentation size effect exists in this alloy,as confirmed by a decrease in hardness with increasing the indentation load and a Meyer’s index n less than 2.The fraction of energy dissipated during indentation(E_d)changes within the range of54%～60%.Cyclic loading tests reveal an obvious hardening effect.
引文
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28 Caer C, Patoor E, Berbenni S et al. Materials Science and Engineering A[J], 2013, 587:304
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30 Wang Z J, Guo S, Wang Q et al. Intermetallics[J], 2014, 53:183
31 Fischer-Cripps A. Nanoindentation, Third Ed[M]. New York:Springer, 2011
32 Li X D, Bhushan B. Materials Characterization[J], 2002, 48:11
33 Ebisu T, Horibe S. Journal of the European Ceramic Society[J], 2010, 30:2419
34 Chang L, Zhang L C. Materials Science and Engineering A[J],2009, 506:125
35 Dar R D, Chen Y. Acta Materialia[J], 2015, 91:112
2 Zhao S F, Yang G N, Ding H Y et al. Intermetallics[J], 2015,61:47
3 Qi Tianlong, Li Yanhui, Takeuchi A et al. Intermetallics[J],2015,66:8
4 Suryanarayana C, Inoue A. Bulk metallic glasses[M]. New York:CRC Press, 2011
5 Chen C, Pang S J, Cheng Y Y et al. Journal of Non-Crystalline Solids[J], 2015, 410:39
6 Takeuchi A, Chen N, Wada T et al. Intermetallics[J], 2011, 19:1546
7 Tripathi M K, Chattopadhyay P P, Ganguly S. Computational Materials Science[J],2015, 107:79
8 Satish Idury K S N, Murty B S, Bhatt J. Intermetallics[J],2015, 65:42
9 Takeuchi A, Chen N, Wada T et al. Procedia Engineering[J],2012, 36:226
10 Gao X Q, Zhao K, Ke H B et al. Journal of Non-Crystalline Solids[J], 2011, 357:3557
11 Zhao S F, Yang G N, Ding H Y et al. Intermetallics[J], 2015, 61:47
12 Zhao S F, Shao Y, Liu X et al. Materials and Design[J], 2015,87:625
13 Wu J L, Pan Y, Pi J H. Journal of Materials Engineering and Performance[J], 2013, 22:2288
14 Zhu L N, Xu B S, Wang H D et al. Critical Reviews in Solid State and Materials Sciences[J], 2015, 40(2):77
15 Mukhopadhyay N K, Paufler P. International Materials Reviews[J], 2006, 51(4):209
16 Schuh C A. Materials Today[J], 2006, 9(5):32
17 Schuh C A, Nieh T G. Journal of Materials Research[J], 2004,19(1):46
18 Xu F, Ding Y H, Deng X H et al. Physica B[J], 2014, 450:84
19 Mukhopadhyay N K, Belger A, Paufler P et al. Materials Science and Engineering A[J], 2007, 449-451:954
20 Chatterjee A, Srivastava M, Sharma G et al. Materials Letters[J],2014, 130:29
21 Wang M, Wang D, Kups T et al. Materials Science andEngineering A[J], 2015, 644:275
22 Li N, Liu L, Chan K C et al. Intermetallics[J], 2009, 17:227
23 Haag F, Beitelschmidt D, Eckert J et al. Acta Materialia[J],2014, 70:188
24 Bhattacharyya A,Singh G,Prasad K E et al. Materials Science and Engineering A[J], 2015, 625:245
25 Cao Q P, Jin J B, Ma Y et al. Journal of Non-Crystalline Solids[J], 2015, 412:35
26 Wu J L, Pan Y, Pi J H. Journal of Materials Engineering and Performance[J], 2014, 23:486
27 Medeiros B B, Medeiros M M, Fornell J et al. Journal of Non-Crystalline Solids[J], 2015, 425:103
28 Caer C, Patoor E, Berbenni S et al. Materials Science and Engineering A[J], 2013, 587:304
29 Pi J H, Wang Z Z, He X C et al. Journal of Materials Engineering and Performance[J], 2016, 25:76
30 Wang Z J, Guo S, Wang Q et al. Intermetallics[J], 2014, 53:183
31 Fischer-Cripps A. Nanoindentation, Third Ed[M]. New York:Springer, 2011
32 Li X D, Bhushan B. Materials Characterization[J], 2002, 48:11
33 Ebisu T, Horibe S. Journal of the European Ceramic Society[J], 2010, 30:2419
34 Chang L, Zhang L C. Materials Science and Engineering A[J],2009, 506:125
35 Dar R D, Chen Y. Acta Materialia[J], 2015, 91:112