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| 1 | PHYSICAL MODELING FOR THE MECHANISMS OF BEAD FORMATION DEFECTS BASED ON THE STABILITY OF LIQUID METAL显示文摘Based on the theory of stability of the liquid metal under the action of surface tension,a physical mod- el is established for the mechanisms of the bead formation deferct’ humping’, which is generated during high - speed welding.A boundary function is introduced to correct the model,theoretical results got by the model correspond well with the experimental phenomena. A two - dimensional conducting model is adoopted in the simulation of the temperature field during high - speed welding.Finally, the factors acting upon the stability of liquid metal are analyzed. | S. Y. Yin L. Feng J. Z. Ding and S. J. Chan( 1) Beijing Polytechnic University, Beijing 100022, China 2) National Key Laboratory of Advanced Wdlding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 28 |
| 2 | COMPUTERIZED SIMULATION AND EXPERIMENTAL RESEARCH ON SOFT-SWITCHING ARC WELDING INVERTER POWER SOURCE显示文摘Based on the existing component models in the Pspice software package, a combined model for Insulat- ed the Bipolar Transistor (IGBT) is established, in which a non - linear is introduced to represent the parasitic capacitance. Using this model, computerized simulation is conducted for the FB - ZVZCS - PWM soft - ewitching converter,the switching and energy-transferring characteristics of the components are analyzed.The simulation results are testified by experiments.It is proved that by abopting appropriate models,computerized simulation becomes an effective tool for investigation of arc welding inverter power source. | S. J. Chen S. Y. Yin L. Feng and L. Y. Li( 1) School of Materials Science and Engineering, Beijing Polytechnic University, Beijing 100022, China 2)National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 24 |
| 3 | SIMULATION ON HEATING PROCESS IN ULTRASONIC WELDING OF PLASTICS显示文摘The energy conversion during ultrasonic plastic welding is analyzed on the basis of the theory of vis- coelastic mechanics,.The temperature field and the temperature change of the ABS specimen with ener- gy director during ultrasonic welding is simulated with finite element method(FEM). In the simu- lation process,the melting of the energy energy is also considered. The calculation results are in good agreement with the temperature measurement results, which proves that the simulation results are reli- able. | S. Q. Yang Z. Dong J. C. Yan and J. B. Ju( National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 10 |
| 4 | APPLICATION OF ARTIFICIAL NEURAL NETWORK MODELING TO PLASMA ARC WELDING OF ALUMINUM ALLOYS显示文摘By using alternating current plasma arc welding,the influences were studied of such parameters as welding curent,arc voltage,welding speed,wire feed rate,and magnitude of ion gas flow on front melting width,wdle reinforcement,and back melting width of LF6 aluminum alloy.Model of the formation of welding seam in alternating current plasma arc welding of aluminum was set up with the method of artificial neural neural network - BP algorithm. Qyakuty of formation was consequently predicted and evaluated.The experimental result shows that,compared with other modeling methods,artificial network model can be used to more accurately predict formation of weld,and to guide the production practice. | D. K. Zhang and J. T. Niu (National Key Laboratory of AdVanced Welding Production Technology of HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 5 |
| 5 | NUMERICAL SIMULATION OF TEMPERATURE FIELDS FOR WELD METAL SOLIDIFICATION CRACKING IN STAINLESS STEELS显示文摘This paper has analyzed the influences of the heat input of welding arc, the latent heat of solidifica- tion,fluid flow of liquid metal on the heat conductivity pertaining to welding solidification crack of stainless steels. As a result,two - dimensional heat conduction models with prescribed heat flux mov- ing along the the have been developed that can simulate welding arc, convection and radiation heat loss from top and bottom surfaces of the workpiece. Finally, the finite element model was used to ana- lyze and calculate the temperature field. | R. P. Liu Z. J. Dong and Y. H. Wei( 1)Harbin Research Institute of Welding, Harbin 150080, China 2)National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 5 |
| 6 | TWO-DIMENSIONAL NUMERICAL ANALYSIS OF PLASMA IMMERSION ION IMPLANTATION OF CYLINDRICAL BORES显示文摘Plasma immersion ion implantation (PIII), unrestricted by sight-light process, is considered a proper method for inner surface strengthening. Two-dimensional simulation oj inner surface PIII process of cylindrical bores were carried out in this paper using cold plasma fluid model, and influence of the bore’s dimension on impact energy, retained dose and uniformity of inner surface were investigated. | A. G. Liu,X.F. Wang, L.P. Wang, S. Y. Wang, B. Y. Tang and P.K. Chu 1) Advanced Welding Production Technology National Key Laboratory, HIT, Harbin 150001, China 2) Department of Physics and Material Science, City University of Hong Kong, 83 Tat Chee Aven | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 4 |
| 7 | STUDY ON DIFFUSION WELDING OF ALUMINIUN MATRIX COMPOSITE显示文摘Effects of diffusion welding parameters on strength of welded joint based on particle reinforced alumini- um matrix composite Al2O3p/6061Al were studied by comparing with aluminium matrix alloy,Mecha- nism for the loss of joint strength was analyzed.It was pointed out that the key processing parameters affecting the strength of joint was the welding temperature.The high quality joint can be successfully obtained with appropriate diffusion welding parameters. | J. T. Niu L. M. Liu J. P. Zhai J. Yu X. M. Zhang (National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 750001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 4 |
| 8 | NUMERICAL SIMULATION OF STRESS-STRAIN DISTRIBUTIONS FOR WELD METAL SOLIDIFICATION CRACKING IN STAINLESS STEEL显示文摘This paper analyzed the characteristics of welding solidification crack of stainless steels,and clearly re- vealed the the of the deformation in the molten - the pool and the solidification shrinkage on the stress - strain fields in the trail of molten - weld pool.Moreover, rheologic properties of the alloys in solid - liquid zone were also obtained by measuring the hading and unloading deform curves of the steels.As a result, a numerical model for simulation of stress - strain distributions of welding solidifi- cation crack was developed. On the basis of the model,the thesis simulated the driving force of solidifi- cation crack of stainless steels, that is, stress - strain fields in the trail of molten-weld pool with fi- nite element method. | Y. H. Wei R. P. Liu and Z. J. Dong( 1) National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China 2) Harbin Research institute of Welding,Harbin 150080, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 2 |
| 9 | NUMERICAL SIMULATION OF PENETRATION PROCESS BASED ON THE VARIATION OF HEAT TRANSFER CONDITION显示文摘In this paper, the process of dynamic heat output in a welding pool and the variation of the penetration caused by the section change of the workpiece are analyzed using numerical simulation technique of thermal field. It is concluded that the variation of temperature gradient in HAZ along the length and width direction reflects the heat output of the welding pool, and that the output of the welding pool has a homogenous relationship to the pool penetration. | L. Q. Li L. Y. Li and Z. Geng (National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 1500001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 2 |
| 10 | DIFFUSION BONDING OF TiAl TO Ti AND TC4 ALLOY显示文摘TiAl was diffusion bonded to Ti and TC4 alloy in vacuum furnace. Results showed,at the TiAl-Ti interface,the reaction layer of stratification Ti3Al was formed closest to TiAl base,and the a phase and the α + βphase arised closest to Ti base at 1173K and 1573K respectively. The phase structure of TiAl/ and the phase structure of TiAlwere observed be- tween AiAl and TC4 under respetive bonding temperature.The fiacture at tensile testing occurred in the bond - line, producing very flat fracture surfaces with some pull-out of the TiAl materials.The ultimate tensile strengths of the joint were approximate to γ-TiAl base marterial. | P. He J. H. Zhang J. C. Feng and Y. Y. Qian (National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 2 |
| 11 | The chromatography of amino acid on ion exchange resins use of volatile acids for elution显示文摘 | Hits HW Moore S Stein WH | 1954 | Journal of American Chemical Society1954，76，1： | 1 |
| 12 | Apoptosis Induced by Tanshinone IIA and Cryptotanshinone Is Mediated by Distinct JAK/STAT3/5 and SHP1/2 Signaling in Chronic Myeloid Leukemia K562 Cells显示文摘 | Ji HIT Tae-Rin K Soo-Jin J | 2013 | Ev- id Based Complement Ahemat Med2013，2013，80： | 1 |
| 13 | EFFECTS OF DIFFUSION WELDING PARAMETERS ON JOINT STRENGTH OF SiCw/6061AI COMPOSITE显示文摘Diffusion welding was used to join SiCw/6061AI composites. The effects of welding pammeters on strength Of welded joint were investigated. JOint Of high quality for SiCw/6061Al composites can be obtained with aPPropriate diffesion welding parameters. | L.M. Liu J.T. Niu Z.H. Lai Y.L. Guo and J.P. Zhai (National Key Laboratory of Advanced Welding Production Technologyt HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 1 |
| 14 | RESISTANCE BRAZING OF SiC/2024AI COMPOSITE显示文摘The resistance brazing of 2024Al reinforced with15 volume percent of Sic particulate was simulated by using a Gleeble - 1500 Tharmal/Mechanical sindator. The results show that too high or too low brazing temperature and pressure result in decrease in shear strength of joint,but brazing time influenc- es it slightly. The action between filler metals and the composite was analyzed by SEM and EPAM. The use of simulation method helped in the design and predication of welding technology,which re- duced the rejection rate as well as the cost of production. | L. H. Han Q. C. Meng J. Zhang and J. T. Niu (National Key Laboratory of Advanced Welding Production Technology of HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 1 |
| 15 | Managing resources:linking unique resources,management,and wealth creation in family firms显示文摘 | SALAMON D G HIT M A | 2003 | Entrepreneurship Theory and Practice2003，27，4： | 1 |
| 16 | Immunohistochemical analysis of hSNF5/INI1 in pediatric CNS neoplasms显示文摘 | Judkins AR Manger J Hit A | 2004 | Am J Surg Pathol2004，28，5： | 1 |
| 17 | Effect of anodic oxidation of coal tar pitch-based carbon fiber on adhesion in epoxy matrix: Part Ⅰ comparative study of three alkaline solutions显示文摘 | YUMITORI S NAKA MIS HIT Y | 1996 | Composites part A1996，，27： | 1 |
| 18 | Chromatographic purification of soluble single-walled carbon nanotubes (s-SWNTs) 显示文摘 | Niyogi S Hit H Haddon R C | 2001 | J Am Chem Soc2001，123，4： | 1 |
| 19 | Carbon Incorporation in Si1-yCy Alloys Grown by Molecular Beam Epitaxy Us- ing a Single Silicon-graphite Source 显示文摘 | DASHIELL M W KULIK L V HITS D | 1998 | Appl Phys Lett1998，72，： | 1 |
| 20 | Protective mucosal im- munity to ocular herpes simplex virus type 1 infection in mice by using Escherichia coli heat-labile enterotoxin B subunit as an ad juvant显示文摘 | Richards CM Aman AT Hit'st TR | 2001 | J Virol2001，75，4： | 1 |
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