(TiB_2-TiC)/Al复合材料的蠕变行为研究
|
摘要
以活塞用铝硅合金为基体,采用原位生成法制备了3种铝基复合材料(0.1wt%TiB_2、0.03wt%TiC和(0.1wt%TiB_2+0.03wt%TiC)),测试了这3种材料在350℃、25～32 MPa载荷下的蠕变性能,观察了损伤部位的显微组织。结果表明,这3种复合材料的蠕变速率均随着载荷的增加而增大。其中,0.03wt%TiC/Al和0.1wt%TiB_2/Al复合材料的抗蠕变性能优于(0.1wt%TiB_2+0.03wt%TiC)/Al复合材料,且这两种材料的蠕变断裂形式均为准解理和部分韧窝的混合型断裂;在Ti B_2和Ti C共同作用时,α-Al晶粒细化明显,晶界比表面积增大,晶界滑移显著,(0.1wt%TiB_2+0.03wt%TiC)/Al复合材料的蠕变塑性和蠕变抗力均下降,蠕变断裂机理为沿晶断裂。
Three aluminum-based composites(0.1wt%TiB_2,0.03wt%TiC and(0.1wt%TiB_2+0.03wt%TiC))were prepared by in-situ formation method using an aluminum-silicon alloy as a substrate.The creep properties of the three materials under25-32MPa loading at 350℃were tested,and the microstructure of the damage site was observed.The results show that,the creep rates of these three composites increase with the increase of load.Among them,the creep resistance of 0.03wt%TiC/Al and 0.1wt%TiB_2/Al composites is better than that of(0.1wt%TiB_2+0.03wt%TiC)/Al composites.In addition,the creep rupture form of both materials is the mixed type fracture of the cleavage and partial phloem.Under the interaction of Ti B_2and Ti Cα-Al grain refines,grain boundary specific surface area obviously increases,and grain boundary obviously slip,and creep plasticity and the creep resistance of(0.1wt%Ti B_2+0.03wt%Ti C)/Al composites are decreased,and the creep fracture mechanism is intergranular fracture.
Three aluminum-based composites(0.1wt%TiB_2,0.03wt%TiC and(0.1wt%TiB_2+0.03wt%TiC))were prepared by in-situ formation method using an aluminum-silicon alloy as a substrate.The creep properties of the three materials under25-32MPa loading at 350℃were tested,and the microstructure of the damage site was observed.The results show that,the creep rates of these three composites increase with the increase of load.Among them,the creep resistance of 0.03wt%TiC/Al and 0.1wt%TiB_2/Al composites is better than that of(0.1wt%TiB_2+0.03wt%TiC)/Al composites.In addition,the creep rupture form of both materials is the mixed type fracture of the cleavage and partial phloem.Under the interaction of Ti B_2and Ti Cα-Al grain refines,grain boundary specific surface area obviously increases,and grain boundary obviously slip,and creep plasticity and the creep resistance of(0.1wt%Ti B_2+0.03wt%Ti C)/Al composites are decreased,and the creep fracture mechanism is intergranular fracture.
引文
[1] Farkoosha R, Pekguleryuz M.The effects of manganese on the T-phase and creep resistance in Al-Si-Cu-Mg-Ni alloys[J].Materials Science and Engineering A,2013,582:248-256.
[2]韩彦峰,刘相法,边秀房.原位生成TiB2/Al-Si-Mg复合材料的组织与性能[J].中国有色金属学报,2001,11(5):840-845.
[3]张卫国,宋爱君,稽峰,等.TiCP/2024复合材料的蠕变性能[J].特种铸造及有色金属,2009,28(4):306-308.
[4] Ji F.Creep behavior of in situ TiCP/2618 aluminum matrix composite[J].Materials Science and Engineering A,2009,506:58-62.
[5]稽峰,宋爱君,张卫国,等.原位自生20vol.%TiCP/LD7Al基复合材料蠕变的应力指数和门槛应力[J].物理学报,2010,59(3):2114-2119.
[6]黄明华,王浩伟,李险峰,等.原位合成TiB2/ZL109复合材料的高温蠕变行为[J].复合材料学报,2005,22(1):36-40.
[7] Huang M H, Li X F, Yi H Z.Effect of in situ TiB2particle reinforcement on the creep resistance of hypoeutectic Al-12Si alloy[J].Journal of Alloys and Compounds,2005,389:275-280.
[8]黄明华,王浩伟,李险峰,等.原位TiB2亚微米颗粒增强铝基复合材料的高温蠕变性能[J].稀有金属材料与工程,2005,34(9):1394-1398.
[9] Ma Z Y, Tjong S C, Meng X M.Creep behavior of in situ dual-scale particles-TiB whisker and TiC particulate-reinforced titanium composites[J].Materials Research Society,2002,17(9):2307-2313.
[10]王洪林,耿林,郑镇珠.(TiB2+TiC)/Ti复合材料的高温蠕变机制[J].哈尔滨工业大学学报,2008,40(9):1412-1415.
[11]郭松松.活塞用Al-Si-Cu-Mg-Ni合金凝固析出Si相和富Ni相的调控[D].西安:西安工业大学,2017.
[12]张俊善.材料的高温变形与断裂[M].北京:科学出版社,2007.
[13] Wu X J, Williams S, Gong D G.A true-Stress creep model based on deformation mechanisms for polycrystalline materials[J].Journal of Materials Engineering and Performance,2012,21(11):2255-2262.
[2]韩彦峰,刘相法,边秀房.原位生成TiB2/Al-Si-Mg复合材料的组织与性能[J].中国有色金属学报,2001,11(5):840-845.
[3]张卫国,宋爱君,稽峰,等.TiCP/2024复合材料的蠕变性能[J].特种铸造及有色金属,2009,28(4):306-308.
[4] Ji F.Creep behavior of in situ TiCP/2618 aluminum matrix composite[J].Materials Science and Engineering A,2009,506:58-62.
[5]稽峰,宋爱君,张卫国,等.原位自生20vol.%TiCP/LD7Al基复合材料蠕变的应力指数和门槛应力[J].物理学报,2010,59(3):2114-2119.
[6]黄明华,王浩伟,李险峰,等.原位合成TiB2/ZL109复合材料的高温蠕变行为[J].复合材料学报,2005,22(1):36-40.
[7] Huang M H, Li X F, Yi H Z.Effect of in situ TiB2particle reinforcement on the creep resistance of hypoeutectic Al-12Si alloy[J].Journal of Alloys and Compounds,2005,389:275-280.
[8]黄明华,王浩伟,李险峰,等.原位TiB2亚微米颗粒增强铝基复合材料的高温蠕变性能[J].稀有金属材料与工程,2005,34(9):1394-1398.
[9] Ma Z Y, Tjong S C, Meng X M.Creep behavior of in situ dual-scale particles-TiB whisker and TiC particulate-reinforced titanium composites[J].Materials Research Society,2002,17(9):2307-2313.
[10]王洪林,耿林,郑镇珠.(TiB2+TiC)/Ti复合材料的高温蠕变机制[J].哈尔滨工业大学学报,2008,40(9):1412-1415.
[11]郭松松.活塞用Al-Si-Cu-Mg-Ni合金凝固析出Si相和富Ni相的调控[D].西安:西安工业大学,2017.
[12]张俊善.材料的高温变形与断裂[M].北京:科学出版社,2007.
[13] Wu X J, Williams S, Gong D G.A true-Stress creep model based on deformation mechanisms for polycrystalline materials[J].Journal of Materials Engineering and Performance,2012,21(11):2255-2262.