How to search?
advanced search

Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 3
items per page: 25 50 75
Sort by:

Experimental Study on the Melting Temperature, Microstructural and Improved Mechanical Properties of Sn58Bi/Cu Solder Alloy Reinforced with 1%, 2% and 3% Zirconia (ZrO2) Nanoparticles

S. Amares R. Durairaj S.H. Kuan
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 2 | 407-418 | DOI: 10.24425/amm.2021.135872
Keywords SnBi solder low melting temperature microstructure hardness shear load
Download PDF Download RIS Download Bibtex

Abstract

This paper investigates the influence of 1%, 2% and 3% zirconia (ZrO2) nanoparticles to the melting, microstructural and mechanical properties of the Sn58Bi solder. Melting temperatures of 145.11°C, 140.89°C and 143.84°C were attained correspondingly for the 1%, 2% and 3% ZrO2 reinforced Sn58Bi solder. The microstructures especially the spacing between the lamellar structures of the Sn58Bi solder alloy was narrower for 1% ZrO2 added with Sn58Bi solder alloy. The highest and lowest hardness value of 32.28 HV and 27.62 HV was recorded for 1% and 2% ZrO2 additions respectively. Highest shear strength value was noted for the 3% ZrO2 added SnBi/Copper joint with 0.8712 kN, while the lowest value of 0.4380 kN noted for the 1% ZrO2 added SnBi/Copper joint. The presence of small-sized ZrO2 nanoparticles can be seen to be properly dispersed at the solder joint to increase the shear load at maximum joint stress.
Go to article

Authors and Affiliations

S. Amares
1 2
R. Durairaj
2
S.H. Kuan
2
  1. Universiti Tunku Abdul Rahman, Lee Kong Chian Faculty of Engineering and Science, Jalan Sungai Long, Bandar Sungai Long, 43000 Kajang, Selangor, Malaysia
  2. Center of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, SEGi University No. 9, Jalan Teknologi, Taman Sains Selangor, Kota Damansara PJU 5, 47810 Petaling Jaya , Selangor, Malaysia

Experimental Study on Deformation and Damage Evolution of a Mining Roadway with Weak Layer Rock under Compression-shear Load

Yimin Song He Ren Hailiang Xu Dong An
Archives of Mining Sciences | 2021 | vol. 66 | No 3 | 351-368 | DOI: 10.24425/ams.2021.138593
Keywords rock burst zonal fracturing compression-shear load interlayer displacement Digital Speckle Correlation method
Download PDF Download RIS Download Bibtex

Abstract

The structure and load characteristics of the roadway are simplified, and the experimental model of the roadway deformation and damage under compression-shear load is established. The experimental data acquisition system is built with a CCD camera. The digital speckle correlation method is used to calculate the image data of the experimental model. The correspondence between the evolution law of the deformation field, the interlayer displacement and deformation evolution are analysed, including the dynamic characteristic of the roadway surrounding the rock. Research results indicate: (1) The damage peak load of the weak layer structure shows a decreasing trend as the interlayer shear stress increases. As the initially applied shear stress increases, the value of interlayer sliding displacement increases, and the dynamic characteristics become more apparent. (2) In the sub-instability phase of the loading curve, when the surrounding rock slides along the layers under compression-shear load, the stress is re-distributed and transmitted to the deep part of the surrounding rock. Then the surrounding rock of the roadway forms the characteristic of alternating change, between tension to compression. (3) According to the state of dynamic and static mechanics, the deformation evolution of the roadway before the peak load belongs to the static process. Zonal fracturing is part of the transition phase from the static process to the slow dynamic process, and the rockburst damage is a high-speed dynamic process. (4) Under the compression-shear load, due to the weak layer structure of the coal and rock mass, the local fracture, damage, instability and sliding of the surrounding rock of the roadway are the mechanical causes of rockburst. (5) Even if the coal and rock mass does not have the condition of impact tendency, under stress load of the horizontal direction, distribution of large shear stress is formed between layers, and the dynamic damage of the rockburst may occur.
Go to article

Bibliography

[1] H. Lippman, The Mechanics of “Protruding” in Coal Mine: Discussion on The Violent Deformation on Both Sides of The Channel in Coal Seam [J], Advances in Mechanics 19 (2), 100-113+59 (1989). DOI: https://doi.org/10.6052/1000-0992-1989-1-j1989-011
[2] H.T. Li, J. Liu, S.K. Zhao, L.S. Cai, Q.X. Qi, L.H. Kong, Experimental Study on The Development Mechanism of Coal Bump Considering The Clamping Effect of Roof and Floor [J], Journal of China Coal Society 43 (11), 2951-2958 (2018). DOI: CNKI:SUN:MTXB.0.2018-11-001
[3] M.V. Kurlenya, V.N. Oparin, V.I. Vostrikov, Effect of Anomalously Low Friction in Block Media [J], Journal of Applied Mechanics & Technical Physics 40 (6), 1116-1120 (1999). DOI: https://doi.org/10.1007/BF02469182
[4] L .M. Dou, H. He, J. He, Z.Y. Wang, New Method of Rock Burst Risk Assessment Using Relative Stress Concentration Factor Superposition [J], Journal of China Coal Society 43 (2), 327-332 (2018). DOI: CNKI:SUN:MTXB.0.2018-02-004
[5] L .P. Li, W.J. Li, Y.S. Pan, Influence of Impact Disturbance on Anomalously Low Friction Rock Bursts [J], Chinese Journal of Rock Mechanics and Engineering, 38 (1), 111-120 (2019). DOI: https://doi.org/10.13722/j.cnki.jrme.2018.0922
[6] L .Y. Pan, H.Z. Yang, Dilatancy Theory for Identification of Premonitory Information of Rock Burst [J], Chinese Journal of Rock Mechanics and Engineering 23 (1), 4528-4530 (2004). DOI: https://doi.org/10.3321/j.issn:1000-6915.2004.z1.056
[7] Q.X. Qi, T.Q. Liu, Y.W. Shi, J.L. Lv, Mechanism of Friction Sliding Instability of Rock Burst [J], Ground Pressure and Strata Control 1, 174-177+200 (1995). DOI: CNKI:SUN:KSYL.0.1995-Z1-042
[8] Q.X. Qi, Y.W. Shi, T.Q. Liu, Mechanism of Instability Caused by Viscous Sliding in Rock Burst [J], Journal of China Coal Society 22 (2), 144-148 (1997). DOI: CNKI:SUN:MTXB.0.1997-02-006
[9] Q.X. Qi, Z.Z. Gao, S. Wang, The Theory of Rock Burst Led by Structure Damage of Bedded Coal-rock Mass [J], Coal Mining Technology (2), 14-17+64 (1998). DOI: CNKI:SUN:MKKC.0.1998-02-004
[10] E.I. Shemyakin, G.L. Fisenko, M.V. Kurlenya, V.N. Oparin, Y.S. Kuznetsov, Zonal Disintegration of Rocks around Underground Work, Part I:Data of In-situ Observations [J], Journal of Mining Science 22 (3), 157-168 (1986). DOI: https://doi.org/10.1007/BF02500863368
[11] E.I. Shemyakin, G.L. Fisenko, M.V. Kurlenya, V.N. Oparin, V.N. Reva, F.P. Glushikhin, M.A. Rozenbaum, E.A. Tropp, Y.S. Kuznetsov, Zonal Disintegration of Rocks around Underground Work, Part II: Rock Fracture Simulated in Equivalent Materials [J], Journal of Mining Science 22 (4), 223-232 (1986). DOI: https://doi.org/10.1007/BF02500845
[12] E.I. Shemyakin, G.L. Fisenko, M.V. Kurlenya, V.N. Oparin, Y.S. Kuznetsov, Zonal Disintegration of Rocks around Underground Workings, Part III: Theoretical Concepts [J], Journal of Mining Science 23 (1), 1-6 (1987). DOI: https://doi.org/10.1007/BF02534034
[13] E.I. Shemyakin, M.V. Kurlenya, V.N. Oparin, V.N. Reva, F.P. Glushikhin, E.A. Tropp, Zonal Disintegration of Rocks around Underground Workings, Part IV: Practical Applications [J], Journal of Mining Science 25 (4), 297- 302 (1989). DOI: https://doi.org/10.1007/BF02528546
[14] W.Q. Guo, S.P. Ma, Y.J. Kang, Q.W. Ma, Virtual Extensometer Based on Digital Speckle Correlation Method and Its Application to Deformation Field Evolution of Rock Specimen [J], Rock and Soil Mechanics 32 (10), 3196- 3200 (2011). DOI: https://doi.org/10.16285/j.rsm.2011.10.030
[15] X.T. Zhang, Q.Y. Zhang, W. Xiang, Q. Gao, S.B. Yuan, C. Wang, Model Test Study of Zonal Disintegration in Deep Layered Jointed Rock Mass [J], Rock and Soil Mechanics 35 (8), 2247-2254 (2014). DOI: CNKI:SUN:YTLX.0.2014-08-018
[16] Y. Xu, P. Yuan, Model Test of Zonal Disintegration in Deep Rock under Blasting Load [J], Chinese Journal of Rock Mechanics and Engineering 34 (S2), 3844-3851 (2015). DOI: CNKI:SUN:YSLX.0.2015-S2-027
[17] Y.M. Song, Z.X. Zhao, L.L. Deng, J.N. Wu, Deformation Field and Acoustic Emission Characteristics of Marble during Sub-instability Stage [J], Journal of Liaoning Technical University 37 (3), 541-546 (2018). DOI: CNKI:SUN:FXKY.0.2018-03-016
[18] Y.S. Pan, K.X. Wang, Pendulum-type Waves Theory on The Mechanism of Anomalously Low Friction between Rock Masses [J], Seismology and Geology 36 (3), 833-844 (2014). DOI: https://doi.org/10.3969/j.issn.0253-4967.2014.03.022
[19] Y.S. Pan, Y.H. Xiao, Z.H. Li, K.X. Wang, Study of Roadway Support Theory of Rock Burst in Coal Mine and Its Application [J], Journal of China Coal Society 39 (2), 222-228 (2014). DOI: https://doi.org/10.13225/j.cnki.jccs.2013.2015
[20] Z.L. Fang, Study on The Ground Pressure and Control Method for Openings in Soft and Broken Rocks in Jin Chuon Mine No. 2 [J]. Journal of Beijing Iron and Steel Institute (1), 1-20 (1984). DOI: CNKI:SUN:BJKD.0.1984-01-000
Go to article

Authors and Affiliations

Yimin Song
1
He Ren
1
Hailiang Xu
1
Dong An
1
  1. North China University of Technology, School of Civil Engineering, China

Enhancing the Strength of Al/Mg Dissimilar Friction Stir Lap Welded Joint by Zn Filler Addition Combined with an Appropriate Heat Input

Huaxia Zhao Peng Gong Shude Ji Xue Gong
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 1 | 137-146 | DOI: 10.24425/amm.2022.137482
Keywords Friction stir lap welding Al/Mg dissimilar alloys Zn filler Heat input Tensile shear load
Download PDF Download RIS Download Bibtex

Abstract

7075-T6 Al and AZ31B Mg dissimilar alloys were friction stir lap welded with or without a Zn filler, and the effect of heat input on the joint quality was systematically studied. The experimental and finite element simulation results displayed that the formation characteristics and microstructures of the joint with or without the Zn filler were significantly affected by the heat input. The tensile shear load of joint with or without the Zn filler increased first and then decreased with the decrease of the welding speed from 200 to 50 mm/min. Moreover, the peak temperature in the stir zone was significantly decreased by the Zn filler addition, and the high temperature zone narrowed along the plate thickness direction. These changes of heat input made that longer mixing region boundary length and larger effective lap width were attained as the Zn filler was used. In addition, due to the replacement of Al-Mg intermetallic compounds (IMCs) by Al-Mg-Zn and Mg-Zn IMCs which were less harmful to the joint, the tensile shear load of the joint with the Zn filler was obviously enhanced compared to that of the joint without the Zn filler at each welding speed. The maximum tensile shear load of 7.2 kN was obtained at the welding speed of 100 mm/min.
Go to article

Authors and Affiliations

Huaxia Zhao
1
ORCID: ORCID
Peng Gong
2
ORCID: ORCID
Shude Ji
2
ORCID: ORCID
Xue Gong
2
ORCID: ORCID
  1. AVIC Manufacturing Technology Institute, Beijing 100024, P. R. China
  2. Shenyang Aerospace University, College of Aerospace Engineering, Shenyang 110136, P. R. China

This page uses 'cookies'. Learn more