Influence of Nb on microstructure and mechanical properties of Ti-Sn ultrafine eutectic alloy
Influence of Nb on microstructure and mechanical properties of Ti-Sn ultrafine eutectic alloy
复制标题
DOI：
10.1007/s12540-017-6263-2
复制
发表时间：
2017-01
影响因子：
3.5
通讯作者：
Young Seok Kim;H. Park;J. Kim;S. Hong;G. Park;Jin Man Park;Jin-Yoo Suh;K. B. Kim
中科院分区：
文献类型：
--
作者：
Young Seok Kim;H. Park;J. Kim;S. Hong;G. Park;Jin Man Park;Jin-Yoo Suh;K. B. Kim
采用吸铸法制备了一系列高强度（T82Sn18）100-xNbx（x=0、1、3、5、9 at%）的大塑性超细共晶合金。ti82sn18二元共晶合金由hcp Ti3Sn相和α- ti相混合组成，具有片状片层型双相组织和微尺度共晶集落。从（T82Sn18）97Nb3来看，合金表现出由β- ti （Nb）固溶体组成的超细尺度相的组织不均匀分布，由片状Ti3Sn和α- ti相间组成。随着Nb含量的增加，β- ti的体积分数不断增加，强度和塑性均得到改善。特别是（Ti82Sn18）91Nb9alloy在室温下具有高强度（σy≈1.1 GPa）和大塑性（εp≈36%）的优异组合。
In this study, A series of the high strength (T82Sn18)100-xNbx(x=0, 1, 3, 5, and 9 at%) ultrafine eutectic alloys with large plasticity are developed by suction casting method. The Ti82Sn18binary eutectic alloy consists of a mixture of a hcp Ti3Sn and aα-Ti phases having the plate-like lamellar type duplex structure with micro scaled eutectic colony. From the (T82Sn18)97Nb3, the alloy display structural heterogeneous distribution of ultrafine-scaled phases composed ofβ-Ti(Nb) solid solution surrounded by alternating plate-like shaped Ti3Sn andα-Ti phases. With increasing Nb content, the volume fraction ofβ-Ti is continuously increased, which induced improving mechanical properties both strength and plasticity. Especially, (Ti82Sn18)91Nb9alloy has the outstanding combination of the high strength (σy≈1.1 GPa) and large plasticity (εp≈36%) at room temperature.