Titanium metal and alloy are key materials for technological development,which significantly promote the development of the hightech economy in China.The consumption of high-end titanium materials and the developmenta...Titanium metal and alloy are key materials for technological development,which significantly promote the development of the hightech economy in China.The consumption of high-end titanium materials and the developmental level of the titanium industry are important indexes of a country’s comprehensive power.However,at present,the application amount and level of high-end titanium materials in China are limited by many factors,including the dependence of raw materials on imports,high processing cost,and structural imbalance of products.Based on the characteristics of titanium resources and the current situation of the titanium industry,the whole titanium industrial chain in China should be updated.Improving the quality of raw materials is important to produce low-cost,high-end titanium materials using titanium resources with high calcium and magnesium contents in the Panxi region.In addition,the steel-titanium joint production is a vital step to reduce the processing cost of titanium materials.Moreover,the consumption structure of titanium materials should be completed to expand their application.Gradually implementing these suggestions,the overall level of China’s titanium industry will be greatly improved,thereby rapidly establishing an advanced scientific and technological country.展开更多
Laser additive manufacturing(LAM)is promising for fabricating multi-metallic component,but the mechanism of microstructural evolution at the interface of two metals is still needed to research further.In this study,a ...Laser additive manufacturing(LAM)is promising for fabricating multi-metallic component,but the mechanism of microstructural evolution at the interface of two metals is still needed to research further.In this study,a 316L stainless steel/Ti6Al4V alloy multi-metal was fabricated by LAM,and the mechanism of intermetallic phase transformation was deeply investigated.Results show that a strong reaction zone(SRZ)can be induced at the interface of the multi-metal.The phase constituents at the SRZ vary fromχ(Ti_(5)Fe_(17)Cr_(5))+Fe_(2)Ti+α′-Ti+β-Ti or FeTi to Fe_(2)Ti+χwhen the laser power is increased.When the scanning speed is further decreased,the thickness of the SRZ is significantly increased,andα′-Ti phase is also formed at this region besides Fe_(2)Ti andχphases.Moreover,the micro-hardness at the SRZ is increased,caused by the intermetallic phase transformation and elemental interdiffusion at the interface.展开更多
文摘Titanium metal and alloy are key materials for technological development,which significantly promote the development of the hightech economy in China.The consumption of high-end titanium materials and the developmental level of the titanium industry are important indexes of a country’s comprehensive power.However,at present,the application amount and level of high-end titanium materials in China are limited by many factors,including the dependence of raw materials on imports,high processing cost,and structural imbalance of products.Based on the characteristics of titanium resources and the current situation of the titanium industry,the whole titanium industrial chain in China should be updated.Improving the quality of raw materials is important to produce low-cost,high-end titanium materials using titanium resources with high calcium and magnesium contents in the Panxi region.In addition,the steel-titanium joint production is a vital step to reduce the processing cost of titanium materials.Moreover,the consumption structure of titanium materials should be completed to expand their application.Gradually implementing these suggestions,the overall level of China’s titanium industry will be greatly improved,thereby rapidly establishing an advanced scientific and technological country.
基金supported by the Key Research and Develop Program of Anhui Province(No.202004b11020030)the China Postdoctoral Science Foundation(No.2020M680292)。
文摘Laser additive manufacturing(LAM)is promising for fabricating multi-metallic component,but the mechanism of microstructural evolution at the interface of two metals is still needed to research further.In this study,a 316L stainless steel/Ti6Al4V alloy multi-metal was fabricated by LAM,and the mechanism of intermetallic phase transformation was deeply investigated.Results show that a strong reaction zone(SRZ)can be induced at the interface of the multi-metal.The phase constituents at the SRZ vary fromχ(Ti_(5)Fe_(17)Cr_(5))+Fe_(2)Ti+α′-Ti+β-Ti or FeTi to Fe_(2)Ti+χwhen the laser power is increased.When the scanning speed is further decreased,the thickness of the SRZ is significantly increased,andα′-Ti phase is also formed at this region besides Fe_(2)Ti andχphases.Moreover,the micro-hardness at the SRZ is increased,caused by the intermetallic phase transformation and elemental interdiffusion at the interface.
