The process of gas tungsten arc welding(GTAW)is applied with AlSi12 filler metal to weld 5052 aluminum alloy and Ti6Al4V titanium alloy in lap configuration.The welded lap joints showed dual features of welding and br...The process of gas tungsten arc welding(GTAW)is applied with AlSi12 filler metal to weld 5052 aluminum alloy and Ti6Al4V titanium alloy in lap configuration.The welded lap joints showed dual features of welding and brazing on the aluminum and titanium parts of the joint,respectively.The continuous reaction layer established in the brazed area and its chemical composition by EDS analysis revealed that the intermetallic compounds(IMCs)layer of Ti(Al,Si)3 phase formed and aluminum was partially substituted by silicon.The thickness of reaction layer differed from 1μm to 3.5μm with increase in welding heat input accordingly.Al,Ti and Si elements in the weld region and IMCs layer were recognized by analysis of EPMA.The maximum tensile shear strength attained at the optimized welding heat input was 376 N/mm and the joint fractured from 5052 aluminum alloy base metal.Furthermore,the microhardness was measured,and the hardness was higher at the Al/Ti interface than in the weld seam and Ti6Al4V alloy base metal because of the development of IMCs.展开更多
Lap Joining of 5052 aluminum alloy(Al5052)to Ti6Al4V titanium alloy(Ti6Al4V)was conducted by gas tungsten arc welding(GTAW)process with AlSi5 filler wire.Microstructure examination revealed that non-uniform persistent...Lap Joining of 5052 aluminum alloy(Al5052)to Ti6Al4V titanium alloy(Ti6Al4V)was conducted by gas tungsten arc welding(GTAW)process with AlSi5 filler wire.Microstructure examination revealed that non-uniform persistent reaction layer developed in Al5052/Ti6Al4V interfacial area,and the intermetallic compounds(IMCs)layer of Ti(Al,Si)3 phase formed with the partial substitution of aluminum by silicon.The thickness of IMCs layer varied from less than 1μm to more than 5μm in accordance with rise in welding current.Aluminum,silicon and titanium elements in the IMCs layer and weld zone were identified by electron probe microanalysis(EPMA).The results demonstrated that sound Al5052/Ti6Al4V joints can be achieved in the range of 50 A–60 A welding current.The maximum tensile shear strength of 293 N/mm was attained at the optimized welding parameter and the joint fractured in the weld zone.Additionally,the micro-Vickers hardness at Al5052/Ti6Al4V interface was relatively higher in comparison with that of the weld seam and Ti6Al4V base metal as a consequence of IMCs formation.展开更多
基金financially supported by the National Natural Science Foundation of China(No.51674060)Collaborative Innovation Center of Major Machine Manufacturing in Liaoning province,China。
基金the National Natural Science Foundation of China(51674060)the Collaborative Innovation Center of Major Machine Manufacturing in Liaoning.
文摘The process of gas tungsten arc welding(GTAW)is applied with AlSi12 filler metal to weld 5052 aluminum alloy and Ti6Al4V titanium alloy in lap configuration.The welded lap joints showed dual features of welding and brazing on the aluminum and titanium parts of the joint,respectively.The continuous reaction layer established in the brazed area and its chemical composition by EDS analysis revealed that the intermetallic compounds(IMCs)layer of Ti(Al,Si)3 phase formed and aluminum was partially substituted by silicon.The thickness of reaction layer differed from 1μm to 3.5μm with increase in welding heat input accordingly.Al,Ti and Si elements in the weld region and IMCs layer were recognized by analysis of EPMA.The maximum tensile shear strength attained at the optimized welding heat input was 376 N/mm and the joint fractured from 5052 aluminum alloy base metal.Furthermore,the microhardness was measured,and the hardness was higher at the Al/Ti interface than in the weld seam and Ti6Al4V alloy base metal because of the development of IMCs.
基金supported by the National Natural Science Foundation of China(51674060)the Fundamental Research Funds for the Central Universities(DUT18LAB01)the Collaborative Innovation Center of Major Machine Manufacturing in Liaoning
文摘Lap Joining of 5052 aluminum alloy(Al5052)to Ti6Al4V titanium alloy(Ti6Al4V)was conducted by gas tungsten arc welding(GTAW)process with AlSi5 filler wire.Microstructure examination revealed that non-uniform persistent reaction layer developed in Al5052/Ti6Al4V interfacial area,and the intermetallic compounds(IMCs)layer of Ti(Al,Si)3 phase formed with the partial substitution of aluminum by silicon.The thickness of IMCs layer varied from less than 1μm to more than 5μm in accordance with rise in welding current.Aluminum,silicon and titanium elements in the IMCs layer and weld zone were identified by electron probe microanalysis(EPMA).The results demonstrated that sound Al5052/Ti6Al4V joints can be achieved in the range of 50 A–60 A welding current.The maximum tensile shear strength of 293 N/mm was attained at the optimized welding parameter and the joint fractured in the weld zone.Additionally,the micro-Vickers hardness at Al5052/Ti6Al4V interface was relatively higher in comparison with that of the weld seam and Ti6Al4V base metal as a consequence of IMCs formation.
基金Research Foundation for High-Level Talent Scholars in North China University of Water Resources and Electric Power(201811034)Open Fund of National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials(HKDNM2019020)+3 种基金National Natural Science Foundation of China(51705151)China Postdoctoral Science Foundation(2019M662011)Open Fund of State Key Laboratory of Advanced Brazing Filler Metals and Technology(SKLABFMT201901)Key Technology Needs of Henan Province Unveiled and Solved Project(191110111000)。
