元素添加方式对Ti-6Al-3Nb-2Zr-1Mo合金性能的影响  被引量:13

Influence of Element Addition Ways on the Performance of Ti-6Al-3Nb-2Zr-1Mo Alloy

在线阅读下载全文

作  者:黄瑜[1] 汤慧萍[1] 贾文鹏[1] 刘海燕[1] 贺卫卫[1] 

机构地区:[1]西北有色金属研究院金属多孔材料国家重点实验室,陕西西安710016

出  处:《稀有金属材料与工程》2011年第12期2227-2231,共5页Rare Metal Materials and Engineering

摘  要:通过研究元素添加方式对粉末冶金Ti-6Al-3Nb-2Zr-1Mo(Ti80)合金微观组织和力学性能的影响,探索了提高粉末冶金Ti80合金材料性能的途径和方法。结果表明:要得到相对密度大于97%的粉末冶金烧结坯,Al必须以NbAl、ZrAl、MoAl、MoAlTi等中间合金方式进行添加;Nb、Zr可以单质或中间合金方式添加;Mo需要以MoAl或MoAlTi中间合金方式添加。Ti不能完全以TiH2的方式添加;当Ti以纯Ti粉方式添加时,拉伸断口没有裂纹产生;当Ti以TiH2方式添加时,断口有显著的裂纹产生;H是裂纹产生的主要原因。当元素以合适的方式添加时,Ti80合金烧结件的性能可达到:σb=890~1020MPa,σ0.1=755~875MPa,σ0.2=785~895MPa,δ5=5.5%~9.0%,ψ=11%~20%,与锻态性能相比,强度性能有显著提高,而塑性降低。The influence of element addition ways on the microstructure and the performance of P/M Ti-6Al-3Nb-2Zr-1Mo alloy (Ti80) was investigated in order to improve the processing properties. The results indicate that Al must be added by NbAl, ZrAl, MoAl or MoAlTi pre-alloy to obtain the relative density above 97%; Nb and Zr can be added by elementary substance or pre-alloy; Mo should be added by MoAl or MoTiAl pre-alloy. Ti can not completely added by TiH2 powder. The tensile fracture of P/M Ti80 alloy exhibits outstretch rupture and has no crack when Ti is added by Ti powder while the tensile fracture shows brittle rupture and has distinct cracks when Ti is added by TiH2 powder. Hydrogen is the main reason causing cracks of the alloy. Adopting appropriate element addition ways, good performance of the P/M Ti80 alloy can be obtained, such as σb=890~1020MPa,σ0.1=755~875MPa,σ0.2=785~895MPa,δ5=5.5%~9.0%,ψ=11%~20%. Compared with the forged alloy, the ~intered alloy has much higher intensity and lower plasticity.

关 键 词:Ti-6Al-3Nb-2Zr-1Mo合金 元素添加方式 性能 

分 类 号:TG146.23[一般工业技术—材料科学与工程]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象