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Online since: October 2014
Authors: Guang Fu Li, Guan Jun Li, Jun Peng, Mao Long Zhang, Zhi Yuan Sun
When tested at 290°C, the weld exhibited characteristics of dynamic strain ageing (DSA), which was more significant when strain rate was decreased from 1x10-6 (1/s) to 3.1 x10-7 (1/s).
The chemical compositions of the three metals are shown in Table 1.
/potential (mV(SHE)) Rm/Rp0.2 (MPa) A (%) tf (h) Z (%) Main failure Mode Failure Position Cross head speed (strain rate): 1.2x10-3 mm/min.（1.0x10-6s-1） N2 500/350 24.0 71.5 62.1 Mechanical Bulk 52M -720 510/355 21.0 70.3 49.2 Mechanical Bulk 52M -200 480/340 23.0 70.8 60.3 Mechanical Bulk 52M -100 490/340 28.8 80.0 50.3 Mechanical Bulk 52M +100 500/355 20.8 61.8 53.9 Mechanical Bulk 52M +200 480/350 20.0 60.0 58.8 Mechanical Bulk 52M +300 400/360 4.7 18.8 21.0 SCC Interface +400 400/355 7.2 23.2 16.0 SCC Interface Lower Cross head speed (strain rate): 3.7x10-4 mm/min.（3.1x10-7s-1） -720 505/350 23.9 231.5 63.8 Mechanical Bulk 52M 0 485/345 26.2 247.5 61.6 Mechanical Bulk 52M +200 525/360 25.2 240.0 56.1 Mechanical Bulk 52M +300 500/350 17.4 175.3 16.4 SCC Interface Fig.4 The morphology of the A508-52M specimens after test at 290°C Conclusions 1.
During SSRT at 290°C, the SA508-52M weld exhibited DSA, which was more significant when strain rate was decreased from 1x10-6 (1/s) to 3.1 x10-7 (1/s). 2.
USA: American Nuclear Society, 2009: 239-250 [9] Kewei FANG, Guanjun LI, Guangfu LI, Wu YANG, Maolong ZHANG, Zhiyuan SUN, Microstructure and Properties of Dissimilar Metal Weld A50852M316L Used for Nuclear Power Plants, Key Engineering Materials, 2011,vol. 479, pp.40-47
The chemical compositions of the three metals are shown in Table 1.
/potential (mV(SHE)) Rm/Rp0.2 (MPa) A (%) tf (h) Z (%) Main failure Mode Failure Position Cross head speed (strain rate): 1.2x10-3 mm/min.（1.0x10-6s-1） N2 500/350 24.0 71.5 62.1 Mechanical Bulk 52M -720 510/355 21.0 70.3 49.2 Mechanical Bulk 52M -200 480/340 23.0 70.8 60.3 Mechanical Bulk 52M -100 490/340 28.8 80.0 50.3 Mechanical Bulk 52M +100 500/355 20.8 61.8 53.9 Mechanical Bulk 52M +200 480/350 20.0 60.0 58.8 Mechanical Bulk 52M +300 400/360 4.7 18.8 21.0 SCC Interface +400 400/355 7.2 23.2 16.0 SCC Interface Lower Cross head speed (strain rate): 3.7x10-4 mm/min.（3.1x10-7s-1） -720 505/350 23.9 231.5 63.8 Mechanical Bulk 52M 0 485/345 26.2 247.5 61.6 Mechanical Bulk 52M +200 525/360 25.2 240.0 56.1 Mechanical Bulk 52M +300 500/350 17.4 175.3 16.4 SCC Interface Fig.4 The morphology of the A508-52M specimens after test at 290°C Conclusions 1.
During SSRT at 290°C, the SA508-52M weld exhibited DSA, which was more significant when strain rate was decreased from 1x10-6 (1/s) to 3.1 x10-7 (1/s). 2.
USA: American Nuclear Society, 2009: 239-250 [9] Kewei FANG, Guanjun LI, Guangfu LI, Wu YANG, Maolong ZHANG, Zhiyuan SUN, Microstructure and Properties of Dissimilar Metal Weld A50852M316L Used for Nuclear Power Plants, Key Engineering Materials, 2011,vol. 479, pp.40-47
Online since: April 2012
Authors: Ramani Mayappan
Results and discussion
Fig. 1 shows the relation between solder spreading area and soldering time at 310ºC.
The Sn-3.5Ag-1.0Cu-0.7Zn solder has higher spreading area compared to other solder alloys.
The formation of Cu3Sn intermetallic at the later stage of aging was explained by Liu & Lee [6] using (1).
References [1] S.W.
Mater. 35(2006) 479-485
The Sn-3.5Ag-1.0Cu-0.7Zn solder has higher spreading area compared to other solder alloys.
The formation of Cu3Sn intermetallic at the later stage of aging was explained by Liu & Lee [6] using (1).
References [1] S.W.
Mater. 35(2006) 479-485
Online since: November 2022
Authors: Abhimanyu Singh Nain, Sardul Singh, Amit Kumar
Figure 1 (a) shows TDAPA in different solvents under normal light, and Figure 1 (b) shows solvents under UV light (374 nm).
Figure 1: TDAPA in different solvents in natural light (a) and under UV light (b). 3.
For Methanol, a large Stokes' shift of 5996.48cm-1 is observed.
References [1] R.
Chem. 10 (2000) 1–25. https://doi.org/10.1039/A908130E
Figure 1: TDAPA in different solvents in natural light (a) and under UV light (b). 3.
For Methanol, a large Stokes' shift of 5996.48cm-1 is observed.
References [1] R.
Chem. 10 (2000) 1–25. https://doi.org/10.1039/A908130E
Online since: July 2013
Authors: Andreas Kyprianou, Andreas Tjirkallis, George Vessiaris
Figure 1: 3DOF mass(mi)–spring(ki)–damper(ci) system.
Table 1.
Damaged Constant Temp. m1 = m2 = m3 [Kg] 1 1 k1 = k2 = k3 = k4 [N/m] k1 = k2 = k3 = k4 = 450 change of k2=225 c1 = c2 = c3 = c4 [Ns/m] 0.2 0.2 Initially the system under consideration is an intact system under a constant temperature, under the application of the excitation force F(t), using the system parameters, shown in Table 1.
Time response, CWT and decay lines of the WTMM at a distance of 479.19mm from the fixed-end of the cantilever beam, in intact (a,b) and damaged (c,d) states.
The time domain responses, CWT, and Decay lines of WTMM for a specific points at a distance of 479.19mm [311th pixel] from the fixed-end of the beam both for an intact and damaged case, obtained using the proposed methodology, are shown in Figure 9.
Table 1.
Damaged Constant Temp. m1 = m2 = m3 [Kg] 1 1 k1 = k2 = k3 = k4 [N/m] k1 = k2 = k3 = k4 = 450 change of k2=225 c1 = c2 = c3 = c4 [Ns/m] 0.2 0.2 Initially the system under consideration is an intact system under a constant temperature, under the application of the excitation force F(t), using the system parameters, shown in Table 1.
Time response, CWT and decay lines of the WTMM at a distance of 479.19mm from the fixed-end of the cantilever beam, in intact (a,b) and damaged (c,d) states.
The time domain responses, CWT, and Decay lines of WTMM for a specific points at a distance of 479.19mm [311th pixel] from the fixed-end of the beam both for an intact and damaged case, obtained using the proposed methodology, are shown in Figure 9.
Online since: September 2022
Authors: Rozana Aina Maulat Osman, Mohd Sobri Idris, Siti Nur Adlina Norazman, Chong Ho Ying, Nazerah Yaacob, Nor Zachy Fernandez
Fig. 1: XRD pattern of Li7La3ZrSnO12 that prepared at 950 oC for 12 hours.
Beq x y z La1 8b 0 1/4 1/8 1 0.025 La2 16e 0.127 0 1/4 1 0.025 Zr1 16c 0 0 0 1 0.025 Li1 8a 0 1/4 3/8 1 0.025 Li2 16f 0.17970 0.42970 1/8 1 0.025 Li3 32g 0.08060 0.08570 0.80410 1 0.025 O1 32g -0.03380 0.05480 0.15240 1 0.025 O2 32g 0.05410 0.85290 0.53380 1 0.025 O3 32g 0.14960 0.02760 0.44640 1 0.025 Crystal symmetry Tetragonal Space group I41/acdz Lattice parameter a = 13.1279 Å, c = 12.6715 Å, V = 2183.83 Å3 Table 2: The initial structure of Li7La3Sn2O12 [4] Atom Wyckoff position Atomic Position Occ.
Beq x y z La1 16n 0 0.30471 0.30222 1 0.025 La2 8h 0.30429 0.30429 0 1 0.025 Sn1 8i 0.35088 0 0 1 0.025 Sn2 4e 0 0 0.32140 1 0.025 Li1 16m 0.1340 0.1340 0.863 1 0.025 Li2 8f 1/4 1/4 1/4 1 0.025 Li3 2a 0 0 0 1 0.025 O1 32o 0.8039 0.3696 0.6302 1 0.025 O2 16m 0.3671 0.3671 0.8116 1 0.025 O3 8g 0 1/2 0.8732 1 0.025 O4 8j 0.7681 1/2 0 1 0.025 O5 8i 0.159 0 0 0.4463 0.025 O6 2b 0 0 1/2 1 0.025 O7 4e 0 0 0.141 0.945 0.025 Crystal symmetry Tetragonal Space group I4/mmm Lattice parameter a = 12.054 Å, c = 11.890 Å, V = 1727.6 Å3 The Rietveld refinements proved that the tetragonal phase of Li7La3Zr2O12 (S.G = I41/acdZ) and Li7La3Sn2O12 (S.G. = I4/mmm) are co-exist in the sample.
References [1] K.
Chemistry of Materials, 25, 3048-3055 DOI: https://doi.org/10.1021/cm401232r [9] Mohd Sobri Idris and Rozana AM Osman, Structure Refinement Strategy of Li-based Complex Oxides using GSAS-EXPGUI software package, Advanced Materials Research, 795, 479-482 (2013). | DOI: https://doi.org/10.4028/www.scientific.net/AMR.795.479 [10] Ku Noor Dhaniah Ku Muhsen, Rozana Aina Maulat Osman, Mohd Sobri Idris, Giant anomalous dielectric behaviour of BaSnO3 at high temperature, Journal of Materials Science: Materials in Electronics, 30, 7514– 7523(2019) DOI: https://doi.org/10.1007/s10854-019-01065-x [11] J.
Beq x y z La1 8b 0 1/4 1/8 1 0.025 La2 16e 0.127 0 1/4 1 0.025 Zr1 16c 0 0 0 1 0.025 Li1 8a 0 1/4 3/8 1 0.025 Li2 16f 0.17970 0.42970 1/8 1 0.025 Li3 32g 0.08060 0.08570 0.80410 1 0.025 O1 32g -0.03380 0.05480 0.15240 1 0.025 O2 32g 0.05410 0.85290 0.53380 1 0.025 O3 32g 0.14960 0.02760 0.44640 1 0.025 Crystal symmetry Tetragonal Space group I41/acdz Lattice parameter a = 13.1279 Å, c = 12.6715 Å, V = 2183.83 Å3 Table 2: The initial structure of Li7La3Sn2O12 [4] Atom Wyckoff position Atomic Position Occ.
Beq x y z La1 16n 0 0.30471 0.30222 1 0.025 La2 8h 0.30429 0.30429 0 1 0.025 Sn1 8i 0.35088 0 0 1 0.025 Sn2 4e 0 0 0.32140 1 0.025 Li1 16m 0.1340 0.1340 0.863 1 0.025 Li2 8f 1/4 1/4 1/4 1 0.025 Li3 2a 0 0 0 1 0.025 O1 32o 0.8039 0.3696 0.6302 1 0.025 O2 16m 0.3671 0.3671 0.8116 1 0.025 O3 8g 0 1/2 0.8732 1 0.025 O4 8j 0.7681 1/2 0 1 0.025 O5 8i 0.159 0 0 0.4463 0.025 O6 2b 0 0 1/2 1 0.025 O7 4e 0 0 0.141 0.945 0.025 Crystal symmetry Tetragonal Space group I4/mmm Lattice parameter a = 12.054 Å, c = 11.890 Å, V = 1727.6 Å3 The Rietveld refinements proved that the tetragonal phase of Li7La3Zr2O12 (S.G = I41/acdZ) and Li7La3Sn2O12 (S.G. = I4/mmm) are co-exist in the sample.
References [1] K.
Chemistry of Materials, 25, 3048-3055 DOI: https://doi.org/10.1021/cm401232r [9] Mohd Sobri Idris and Rozana AM Osman, Structure Refinement Strategy of Li-based Complex Oxides using GSAS-EXPGUI software package, Advanced Materials Research, 795, 479-482 (2013). | DOI: https://doi.org/10.4028/www.scientific.net/AMR.795.479 [10] Ku Noor Dhaniah Ku Muhsen, Rozana Aina Maulat Osman, Mohd Sobri Idris, Giant anomalous dielectric behaviour of BaSnO3 at high temperature, Journal of Materials Science: Materials in Electronics, 30, 7514– 7523(2019) DOI: https://doi.org/10.1007/s10854-019-01065-x [11] J.
Online since: April 2014
Authors: Ekarat Meechoowas, Usuma Naknikham, Tepiwan Jitwatcharakomol, Parida Jampeerung, Kanit Tapasa
The composition of commercial glass billets is presented in Table 1 [4-5].
Table 1.
At 1350 °C, 1, 3 and 5 batches are almost completely melted.
The chemical heat demand and exploited heat of batches Thermodynamic data Batch 1 2 3 4 5 Hochem (kWh/t) 157 117 140 149 137 Hex (kWh/t) 489 477 479 494 488 The chemical analysis of glasses is presented in table 4.
a b c d e Fig.1 The glass batches after melted at 1350 °C for 1 hr.
Table 1.
At 1350 °C, 1, 3 and 5 batches are almost completely melted.
The chemical heat demand and exploited heat of batches Thermodynamic data Batch 1 2 3 4 5 Hochem (kWh/t) 157 117 140 149 137 Hex (kWh/t) 489 477 479 494 488 The chemical analysis of glasses is presented in table 4.
a b c d e Fig.1 The glass batches after melted at 1350 °C for 1 hr.
Online since: October 2022
Authors: Kai Wen, Yong An Zhang, Wei Cai Ren, Hong Lei Liu, Tian You Zhang
Fig. 1 shows the OM and SEM microstructure of the three alloys.
The initial melting temperature for the three alloys varies in a small range of 477~479℃ and quite small bending of the peaks exists on about 485℃, which proves the phase identification of SEM observation.
Fig. 1 OM and SEM images of as-cast Al-Zn-Mg-Cu alloys.
References [1] P.
Alloys Compd. 2008, 456(1-2): 163-169
The initial melting temperature for the three alloys varies in a small range of 477~479℃ and quite small bending of the peaks exists on about 485℃, which proves the phase identification of SEM observation.
Fig. 1 OM and SEM images of as-cast Al-Zn-Mg-Cu alloys.
References [1] P.
Alloys Compd. 2008, 456(1-2): 163-169
Online since: August 2022
Authors: Muhammad Dirhamsyah, Muhammad Rizal, Mohd Iqbal, Mustafa Alayaini
Table 1.
Vol 54 No.1, Maret, hal. 11- 19 [7] Callahan, Richard.
Flywheel: Jurnal Teknik Mesin Untirta, 2(1)
JURNAL TEKNIK MESIN, 22(1)
TRAKSI, 14(1)
Vol 54 No.1, Maret, hal. 11- 19 [7] Callahan, Richard.
Flywheel: Jurnal Teknik Mesin Untirta, 2(1)
JURNAL TEKNIK MESIN, 22(1)
TRAKSI, 14(1)
Online since: October 2010
Authors: Nai Yuan Gao, Ai Bin Xu, Li Ping Wang, Xia Xu, Xiao Fei Yan
The results were shown in Fig. 1.
The turbidity removal rates were similar when Fe/Si mole ratios were 2/1, 1/1, 1/2 and 1/3.
When Fe/Si>1, it would cause chromaticity question, at the same time, it could not achieve well effect when Fe/Si <1.
Eur Pat Appl., EP 479 219(CL.
COZF 1/52), 1992-04-08.
The turbidity removal rates were similar when Fe/Si mole ratios were 2/1, 1/1, 1/2 and 1/3.
When Fe/Si>1, it would cause chromaticity question, at the same time, it could not achieve well effect when Fe/Si <1.
Eur Pat Appl., EP 479 219(CL.
COZF 1/52), 1992-04-08.
Online since: June 2014
Authors: Hong Wei Wang, Yong Fang Wang, Chun Long Zhao, Qing Chao Xing, Hai Tao Zhao, Liang Ma, Duan Bo Cai
Investigation of Phytoplankton and Evaluation on Water Quality of
Taizi River in Liaoyang Area
Hongwei WANG1,2,3,4,5,a, Qingchao XING1,b, Chunlong ZHAO6,c*,
Haitao ZHAO6,d, Liang MA 1,e, Yongfang WANG 1,f, Duanbo CAI 7,g
1.
It is necessary to know the conditions of river water quality in time in order to control and prevent the water pollutions in Taizi River (Fig.1).
Phytoplankton is important component of aquatic ecological system, can be used as biological monitoring index for water quality [1, 2].
Tab. 1 Assessment criterion of each index H′ d J Range Criterion Range Criterion Range Criterion 0-1 oligo-polluted 0-1 serious pollution 0-0.3 heavy pollution 1-2 α-meso-polluted 1-2 heavy pollution 0.3-0.5 meso-polluted 2-3 β-meso-polluted 2-3 meso-polluted 0.5-0.8 oligo-polluted >3 heavy pollution 3-4 oligo-polluted >4 clean Results According to the result of qualitative and quantitative analysis for the phytoplankton in Liaohe river, 130 species belong to 63 genera of 6 phyla were found.
Water Research, 1973, 7:479~487
It is necessary to know the conditions of river water quality in time in order to control and prevent the water pollutions in Taizi River (Fig.1).
Phytoplankton is important component of aquatic ecological system, can be used as biological monitoring index for water quality [1, 2].
Tab. 1 Assessment criterion of each index H′ d J Range Criterion Range Criterion Range Criterion 0-1 oligo-polluted 0-1 serious pollution 0-0.3 heavy pollution 1-2 α-meso-polluted 1-2 heavy pollution 0.3-0.5 meso-polluted 2-3 β-meso-polluted 2-3 meso-polluted 0.5-0.8 oligo-polluted >3 heavy pollution 3-4 oligo-polluted >4 clean Results According to the result of qualitative and quantitative analysis for the phytoplankton in Liaohe river, 130 species belong to 63 genera of 6 phyla were found.
Water Research, 1973, 7:479~487