Pub Date : 1994-06-01DOI: 10.2207/QJJWS1943.64.457
M. Ushio, H. Yamamoto, Y. Nishida, T. Mita
{"title":"Recent Advances in Welding Power Systems for Automated Welding","authors":"M. Ushio, H. Yamamoto, Y. Nishida, T. Mita","doi":"10.2207/QJJWS1943.64.457","DOIUrl":"https://doi.org/10.2207/QJJWS1943.64.457","url":null,"abstract":"","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"39 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81655104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1994-06-01DOI: 10.2534/JJASNAOE1968.1994.307
Y. Ueda, H. Murakawa, S. Gu, Y. Okumoto, M. Ishiyama
A computational method for simulating the cutting process, based on the thermal-elastic-plastic FEM has been developed. The proposed method is verified by comparing the computations with experimental results obtained for plasma cutting. Using the FEM model, the residual plastic strain and the plate motion due to the transient thermal expansion are obtained respectively. Their effects are quantitatively discussed. The results show that these factors have great influences on the one-side cutting and small effects on the two-side simultaneous cutting. The influences of the residual stress existing in the plate before cutting are also investigated.
{"title":"FEM Simulation of Gas and Plasma Cutting with Emphasis on Precision of Cutting(Mechanics, Strength & Structural Design)","authors":"Y. Ueda, H. Murakawa, S. Gu, Y. Okumoto, M. Ishiyama","doi":"10.2534/JJASNAOE1968.1994.307","DOIUrl":"https://doi.org/10.2534/JJASNAOE1968.1994.307","url":null,"abstract":"A computational method for simulating the cutting process, based on the thermal-elastic-plastic FEM has been developed. The proposed method is verified by comparing the computations with experimental results obtained for plasma cutting. Using the FEM model, the residual plastic strain and the plate motion due to the transient thermal expansion are obtained respectively. Their effects are quantitatively discussed. The results show that these factors have great influences on the one-side cutting and small effects on the two-side simultaneous cutting. The influences of the residual stress existing in the plate before cutting are also investigated.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"1 1","pages":"93-102"},"PeriodicalIF":0.0,"publicationDate":"1994-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90621757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, a predicting method of welding residual stress by using the source of residual stress (inherent strain) is proposed. And the validity of the method is demonstrated by numerical experiments with the aid of the finite element method.Welding residual stress is produced as a result of thermal elasto-plastic behavior. Their source is composed of the thermal strain and/or plastic strain, etc., which is called here inherent strain.Taking a butt welding joint as an example, the sources of residual stress are estimated in different sizes manufactured on the same welding condition. It is found that the distributions of the source of residual stress are almost the same if the sizes of the joint are larger than that of a specific one, which is named a standard size.It is demonstrated that the residual stress produced in the joint of any different sizes can be predicted accurately by elastic analysis using the inherent strain in a standard size of the joint, unless the sizes are too small.
{"title":"A Predicting Method of Welding Residual Stress Using Source of Residual Stress (Report III) : Prediction of Residual Stresses in T- and I-joints Using Inherent Strains(Mechanics, Strength & Structural Design)","authors":"Y. Ueda, M. Yuan","doi":"10.2207/qjjws.6.59","DOIUrl":"https://doi.org/10.2207/qjjws.6.59","url":null,"abstract":"In this paper, a predicting method of welding residual stress by using the source of residual stress (inherent strain) is proposed. And the validity of the method is demonstrated by numerical experiments with the aid of the finite element method.Welding residual stress is produced as a result of thermal elasto-plastic behavior. Their source is composed of the thermal strain and/or plastic strain, etc., which is called here inherent strain.Taking a butt welding joint as an example, the sources of residual stress are estimated in different sizes manufactured on the same welding condition. It is found that the distributions of the source of residual stress are almost the same if the sizes of the joint are larger than that of a specific one, which is named a standard size.It is demonstrated that the residual stress produced in the joint of any different sizes can be predicted accurately by elastic analysis using the inherent strain in a standard size of the joint, unless the sizes are too small.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"118 1","pages":"157-168"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77292541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1993-08-01DOI: 10.22486/IWJ.V27I2.148271
M. Ushio, K. Ikeuchi, Manabu Tanaka, T. Seto
{"title":"Effects of Shielding Gas Composition on Metal Transfer Phenomena in High Current GMA Welding(Physics, Process, Instruments & Measurements)","authors":"M. Ushio, K. Ikeuchi, Manabu Tanaka, T. Seto","doi":"10.22486/IWJ.V27I2.148271","DOIUrl":"https://doi.org/10.22486/IWJ.V27I2.148271","url":null,"abstract":"","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"1 1","pages":"7-12"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77196801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-06-01DOI: 10.1080/10426919208947398
A. Ohmori, S. Sano, Y. Arata, N. Iwamoto
ABSTRACT The YBaCu-O and Bi(Pb)SrCaCu-0 system superconductor coatings by thermal spraying are described. YBaCu-O system superconductor coatings are sprayed by using perovskite type and non-perovskite type powders. As sprayed coatings are not superconducting and there is no perovskite structure even when perovskite type powders are used, but they become superconducting after heat treatment in air. An electrochemical method was also employed, to obtain a high quality superconductor applying an electric field treatment. Bi(Pb)SrCsiCu-0 system superconductor coatings are sprayed by changing the starting composition. As-sprayed coatings were not superconducting, but they become superconducting after heat treatment in air like the YBaCu-O system. The Tc of the sprayed coatings using (Bi1-xPbx)5Sr3Ca2Cu3-O powders is higher than the Tc of sprayed coatings using (Bi1-xPbx) 2Sr2Ca2Cu3-O powders.
{"title":"Formation of YBaCu-O System Superconductor by Thermal Spraying(Materials, Metallugy & Weldability)","authors":"A. Ohmori, S. Sano, Y. Arata, N. Iwamoto","doi":"10.1080/10426919208947398","DOIUrl":"https://doi.org/10.1080/10426919208947398","url":null,"abstract":"ABSTRACT The YBaCu-O and Bi(Pb)SrCaCu-0 system superconductor coatings by thermal spraying are described. YBaCu-O system superconductor coatings are sprayed by using perovskite type and non-perovskite type powders. As sprayed coatings are not superconducting and there is no perovskite structure even when perovskite type powders are used, but they become superconducting after heat treatment in air. An electrochemical method was also employed, to obtain a high quality superconductor applying an electric field treatment. Bi(Pb)SrCsiCu-0 system superconductor coatings are sprayed by changing the starting composition. As-sprayed coatings were not superconducting, but they become superconducting after heat treatment in air like the YBaCu-O system. The Tc of the sprayed coatings using (Bi1-xPbx)5Sr3Ca2Cu3-O powders is higher than the Tc of sprayed coatings using (Bi1-xPbx) 2Sr2Ca2Cu3-O powders.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"19 1","pages":"53-60"},"PeriodicalIF":0.0,"publicationDate":"1991-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73643386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Effect of carbide addition on the surface characteristics of aluminum alloy 5083 has been investigated with the plasma transferred arc welding process (DCSP) of NbC, TiC or SiC powder. Optimum overlaying conditions under which bead appearance is superior and porosities in overlaid metal are lesser are determined. Moreover some characteristics of overlaid metal containing carbide are evaluated under these optimum conditions. The results are summarized as follows: (1) The maximum area fraction of carbide in overlaid metal is about 40% for NbC and TiC, and about 30% for SiC, (2) Vickers hardness of overlaid metal containing carbide is in the range between 111 and 141hgf/mm2, (3) Abrasive resistance of overlaid metal at higher sliding speed is remarkably improved by the addition of carbide although that at lower sliding speed is not almost improved, (4) In the 180 degree bend test, cracks appear not in the boundary layer between overlaid and base metals but only in overlaid zone, meaning that the boundary layer is sound enough for ductility.
{"title":"Carbide Addition on Aluminum Alloy Surface by Plasma Transferred Arc Welding Process(Surface Processing)","authors":"F. Matsuda, K. Nakata, S. Shimizu, K. Nagai","doi":"10.2464/JILM.40.761","DOIUrl":"https://doi.org/10.2464/JILM.40.761","url":null,"abstract":"Effect of carbide addition on the surface characteristics of aluminum alloy 5083 has been investigated with the plasma transferred arc welding process (DCSP) of NbC, TiC or SiC powder. Optimum overlaying conditions under which bead appearance is superior and porosities in overlaid metal are lesser are determined. Moreover some characteristics of overlaid metal containing carbide are evaluated under these optimum conditions. The results are summarized as follows: (1) The maximum area fraction of carbide in overlaid metal is about 40% for NbC and TiC, and about 30% for SiC, (2) Vickers hardness of overlaid metal containing carbide is in the range between 111 and 141hgf/mm2, (3) Abrasive resistance of overlaid metal at higher sliding speed is remarkably improved by the addition of carbide although that at lower sliding speed is not almost improved, (4) In the 180 degree bend test, cracks appear not in the boundary layer between overlaid and base metals but only in overlaid zone, meaning that the boundary layer is sound enough for ductility.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"5 1","pages":"241-247"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72797546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The importance of convective heat transfer in the weld pool has been widely recognized in relation to the penetration shapes of base metal.The main causes that associate streaming in molten pool are the electro magnetic force, buoyancy force, surface tension and aero dynamic drag force. But, the mechanism of heat transfer has not yet been clarified well. Therefore, in this work, they have paid special attension on the importance of convectional heat transfer in the weld pool and the anode size or heat source size under the same heat input, or same current value. A finite difference method was employed to solve above-mentioned mechanism. The results obwere tained as follows.1) When arc length is short, the velocity field induced by outward surface shear strss consists of two flow loops of opposite directions in the molten pool, which lead to comparatively deep weld shape.2) In case of short arc length and positive temperature coefficient of surface tension, surface tension is predominant. Accordingly, penetration shape is deep.3) In case of long arc length aero dynamic drag force is predominant, which leads to the 'shallow' center and 'deep' peripheral penetration.
{"title":"Convection in Weld Pool and Its Effect on Penetration Shape in Stationary Arc Welds(Physics, Process, Instrument & Measurement)","authors":"A. Matsunawa, S. Yokoya, Y. Asako","doi":"10.2207/QJJWS.6.455","DOIUrl":"https://doi.org/10.2207/QJJWS.6.455","url":null,"abstract":"The importance of convective heat transfer in the weld pool has been widely recognized in relation to the penetration shapes of base metal.The main causes that associate streaming in molten pool are the electro magnetic force, buoyancy force, surface tension and aero dynamic drag force. But, the mechanism of heat transfer has not yet been clarified well. Therefore, in this work, they have paid special attension on the importance of convectional heat transfer in the weld pool and the anode size or heat source size under the same heat input, or same current value. A finite difference method was employed to solve above-mentioned mechanism. The results obwere tained as follows.1) When arc length is short, the velocity field induced by outward surface shear strss consists of two flow loops of opposite directions in the molten pool, which lead to comparatively deep weld shape.2) In case of short arc length and positive temperature coefficient of surface tension, surface tension is predominant. Accordingly, penetration shape is deep.3) In case of long arc length aero dynamic drag force is predominant, which leads to the 'shallow' center and 'deep' peripheral penetration.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"104 1","pages":"229-236"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82520660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yoshiaki Yamamoto, S. Kaga, Katsuhiro Fujii, Y. Fujioka, Katsunori Inoue, Y. Arata
Supposing the case in which leakage takes place in tubing of steam generator, the explosive plugging method was developed by Japan Welding Engineering Society etc. It was indicated by the researchers that this method is effective to the purpose.It is not yet known whether the plugged parts keep the stable strength or not, during the long service period in the environment of steam generator.Under the above consideration, following three tests on plugged part are conducted.1. Thermal Shock Test2. Stress Corrosion Cracking Test3. Liquid Sodium Corrosion TestTesting results are grained as follows.1. Peeling occures immediately after beginning of thermal shook test. Cracking occures after 150-200 thermal cycles in SH, 200-400 thermal cycles in EV and 1000 thermal cycles in SG.2. Residual stress in tube plate near the plug is compressive. SCC does not occur in the tube plate there. It occures on the inner surface of plug.3. The susceptibility to SCC of explosive bonded boundary is lower than that of base metal due to martensite in bonded boundary.4. Explosive bonded boundary is somewhat weaker than base metal in the resistance to the sodium attack under the testing condition employed in liquid sodium corrosion test.
{"title":"Study on the Strength of Explosive Plugged Part under the Environment of Steam Generator","authors":"Yoshiaki Yamamoto, S. Kaga, Katsuhiro Fujii, Y. Fujioka, Katsunori Inoue, Y. Arata","doi":"10.2207/QJJWS.6.71","DOIUrl":"https://doi.org/10.2207/QJJWS.6.71","url":null,"abstract":"Supposing the case in which leakage takes place in tubing of steam generator, the explosive plugging method was developed by Japan Welding Engineering Society etc. It was indicated by the researchers that this method is effective to the purpose.It is not yet known whether the plugged parts keep the stable strength or not, during the long service period in the environment of steam generator.Under the above consideration, following three tests on plugged part are conducted.1. Thermal Shock Test2. Stress Corrosion Cracking Test3. Liquid Sodium Corrosion TestTesting results are grained as follows.1. Peeling occures immediately after beginning of thermal shook test. Cracking occures after 150-200 thermal cycles in SH, 200-400 thermal cycles in EV and 1000 thermal cycles in SG.2. Residual stress in tube plate near the plug is compressive. SCC does not occur in the tube plate there. It occures on the inner surface of plug.3. The susceptibility to SCC of explosive bonded boundary is lower than that of base metal due to martensite in bonded boundary.4. Explosive bonded boundary is somewhat weaker than base metal in the resistance to the sodium attack under the testing condition employed in liquid sodium corrosion test.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"84 1","pages":"429-430"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85524889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1987-06-01DOI: 10.1080/09507119009447771
Y. Ueda, H. Murakawa, H. Kimura
Soft weld joints or under matching weld joints are often employed in the welding of high tensile strength steel to avoid crackings. The compressive strength of structural members, such as columns, plates and pipes, with soft weld joints is analyzed by Finite Element Method and simple mechanical models. Especially, the effects of the width and the location of the soft joint, slenderness ratio, initial deflection and the strain hardening are clarified.
{"title":"Compressive Strength of Structural Members with Soft Weld Joints(Mechanics, Strength & Structural Design)","authors":"Y. Ueda, H. Murakawa, H. Kimura","doi":"10.1080/09507119009447771","DOIUrl":"https://doi.org/10.1080/09507119009447771","url":null,"abstract":"Soft weld joints or under matching weld joints are often employed in the welding of high tensile strength steel to avoid crackings. The compressive strength of structural members, such as columns, plates and pipes, with soft weld joints is analyzed by Finite Element Method and simple mechanical models. Especially, the effects of the width and the location of the soft joint, slenderness ratio, initial deflection and the strain hardening are clarified.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"140 7","pages":"177-187"},"PeriodicalIF":0.0,"publicationDate":"1987-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91538386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Si3N4/Si3N4 joint was made using Cu66Ti34, Cu50Ti50 and Cu43Ti57 amorphous filler metals, where pressureless sintered Si3N4 was used. The joining strength of Si3N4 joint was measured by fracture shear testing, and the joining mechanism was investigated by microstructure observation with SEM, and elements analyses at the joint interface with EDX and EPMA. The results obtained are summarized as follows.(1) The molten Cu-Ti alloys containing 20 at% Ti or more exhibit the equilibrium contact angle of about 8°, and are applicable to the filler metal for joining of Si3N4.(2) The joining strength of Si3N4 using Cu66Ti34 filler is higher than that of Si3N4 using other Cu-Ti fillers at any brazing temperature except for brazing temperature of 1273 K. Thus, the joining strength of Si3N4 with Cu66Ti34 filler shows the maximum value of 313.8 MPa at brazing temperature of 1323 K. At the brazing temperature of 1373 K, Si3N4 joint with Cu50Ti50 filler shows the maximum value of 176.5 MPa at brazing time of 1.8 ks, and gradually decreases with longer brazing lime, and to 19.6 MPa at brazing time of 7.2 ks. The elevated temperature fracture shear strength of Si3N4 joint brazed at 1373 K for 1.8 ks using Cu50Ti50 filler increases to 199.1 MPa at 373 K, and gradually decreases to 105.9 MPa at 973 K.(3) During brazing Ti in molten Cu50Ti50 filler reacts with Si3N4 by the following reactions. Si3N4(s) +4Ti(1)=4TiN(s)+3Si(s), and Si3N4(s)+9Ti(1)=4TiN(s)Ti5Si3(s). TiN at the interface between Si3N4 and the filler, Ti5Si3, and Cu-Si phase at the central part of the filler are formed. The activation energy for growth of TiN at the joining interface is 206.3 kJ/mol, and the growth of TiN is dominated by the diffusion of N in TiN. The silicon content of the Cu-Ti phase increases about 7 at%Si to about 20 at%Si with increasing the brazing temperature.
{"title":"Joining of Silicon Nitride Using Amorphous Cu-Ti Filler Metal(Materials, Metallurgy & Weldability)","authors":"M. Naka, Tasuku Tanaka, I. Okamoto","doi":"10.2207/QJJWS.4.597","DOIUrl":"https://doi.org/10.2207/QJJWS.4.597","url":null,"abstract":"Si3N4/Si3N4 joint was made using Cu66Ti34, Cu50Ti50 and Cu43Ti57 amorphous filler metals, where pressureless sintered Si3N4 was used. The joining strength of Si3N4 joint was measured by fracture shear testing, and the joining mechanism was investigated by microstructure observation with SEM, and elements analyses at the joint interface with EDX and EPMA. The results obtained are summarized as follows.(1) The molten Cu-Ti alloys containing 20 at% Ti or more exhibit the equilibrium contact angle of about 8°, and are applicable to the filler metal for joining of Si3N4.(2) The joining strength of Si3N4 using Cu66Ti34 filler is higher than that of Si3N4 using other Cu-Ti fillers at any brazing temperature except for brazing temperature of 1273 K. Thus, the joining strength of Si3N4 with Cu66Ti34 filler shows the maximum value of 313.8 MPa at brazing temperature of 1323 K. At the brazing temperature of 1373 K, Si3N4 joint with Cu50Ti50 filler shows the maximum value of 176.5 MPa at brazing time of 1.8 ks, and gradually decreases with longer brazing lime, and to 19.6 MPa at brazing time of 7.2 ks. The elevated temperature fracture shear strength of Si3N4 joint brazed at 1373 K for 1.8 ks using Cu50Ti50 filler increases to 199.1 MPa at 373 K, and gradually decreases to 105.9 MPa at 973 K.(3) During brazing Ti in molten Cu50Ti50 filler reacts with Si3N4 by the following reactions. Si3N4(s) +4Ti(1)=4TiN(s)+3Si(s), and Si3N4(s)+9Ti(1)=4TiN(s)Ti5Si3(s). TiN at the interface between Si3N4 and the filler, Ti5Si3, and Cu-Si phase at the central part of the filler are formed. The activation energy for growth of TiN at the joining interface is 206.3 kJ/mol, and the growth of TiN is dominated by the diffusion of N in TiN. The silicon content of the Cu-Ti phase increases about 7 at%Si to about 20 at%Si with increasing the brazing temperature.","PeriodicalId":23197,"journal":{"name":"Transactions of JWRI","volume":"44 1","pages":"83-90"},"PeriodicalIF":0.0,"publicationDate":"1987-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88583010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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