The Ti effects on the glass forming ability and the magnetic properties of Y-Fe-B-Ti bulk metallic glasses have been investigated.Substituting 2 and 4 at% Ti for Fe or B in Y_6Fe_ 70B_ 22 alloys decrease the saturatio...The Ti effects on the glass forming ability and the magnetic properties of Y-Fe-B-Ti bulk metallic glasses have been investigated.Substituting 2 and 4 at% Ti for Fe or B in Y_6Fe_ 70B_ 22 alloys decrease the saturation magnetization(σ_s)and deteriorate the glass forming ability,respectively.However,substitution of 2 at% Ti for Y in Y_6Fe_ 72B_ 22 alloy induces larger supercooled region of 72.7℃,which not only makes the bulk glassy rod as large as 3mm in diameter,but also results in the superior soft magnetic properties of σ_s=126emu/g,coercivity(H_c)=0.2 Oe and Curie temperature(T_C)=268℃.Among all Y-Fe-B-Ti bulk amorphous rods,Y_4Fe_ 72B_ 22Ti_2 displays the best glass forming ability and also the proper soft magnetic properties.展开更多
Given the increasing use of glass mat-reinforced thermoplastic(GMT)composites,the formability of GMT sheets is currently a topic of research.A new sheet forming process for solidified GMT was developed.In this process...Given the increasing use of glass mat-reinforced thermoplastic(GMT)composites,the formability of GMT sheets is currently a topic of research.A new sheet forming process for solidified GMT was developed.In this process,a GMT sheet was sandwiched by dummy metallic sheets during deep drawing.The dummy metallic sheets acted as protective materials and media for heating the GMT sheet.In this study,tensile tests of GMT specimens were carried out under different temperature conditions.The effect of temperature on the tensile deformation was analyzed.The effect of temperature on the deep drawing process of GMT sheets with dummy sheets was further investigated.Finite element method(FEM)was conducted to simulate the deep drawing process.In the drawing force rising stage,the law of drawing force with the depth of the drawing was analyzed using FEM and experiments.展开更多
文摘The Ti effects on the glass forming ability and the magnetic properties of Y-Fe-B-Ti bulk metallic glasses have been investigated.Substituting 2 and 4 at% Ti for Fe or B in Y_6Fe_ 70B_ 22 alloys decrease the saturation magnetization(σ_s)and deteriorate the glass forming ability,respectively.However,substitution of 2 at% Ti for Y in Y_6Fe_ 72B_ 22 alloy induces larger supercooled region of 72.7℃,which not only makes the bulk glassy rod as large as 3mm in diameter,but also results in the superior soft magnetic properties of σ_s=126emu/g,coercivity(H_c)=0.2 Oe and Curie temperature(T_C)=268℃.Among all Y-Fe-B-Ti bulk amorphous rods,Y_4Fe_ 72B_ 22Ti_2 displays the best glass forming ability and also the proper soft magnetic properties.
基金Project(CG2016003001)supported by the Ministry of Human Resources and Social Security of China
文摘Given the increasing use of glass mat-reinforced thermoplastic(GMT)composites,the formability of GMT sheets is currently a topic of research.A new sheet forming process for solidified GMT was developed.In this process,a GMT sheet was sandwiched by dummy metallic sheets during deep drawing.The dummy metallic sheets acted as protective materials and media for heating the GMT sheet.In this study,tensile tests of GMT specimens were carried out under different temperature conditions.The effect of temperature on the tensile deformation was analyzed.The effect of temperature on the deep drawing process of GMT sheets with dummy sheets was further investigated.Finite element method(FEM)was conducted to simulate the deep drawing process.In the drawing force rising stage,the law of drawing force with the depth of the drawing was analyzed using FEM and experiments.
