新聞資訊
Sn、Zr、Mo對Ti35Nb基合金組織與力學性能的影響
發布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-08-19
根據鈦合金相關設計理論，采用無細胞毒性的合金元素Nb、Sn、Zr和Mo設計具有低彈性模量的近β型Ti35Nb-Sn-Zr-Mo五元鈦合金，研究Sn、Zr和Mo合金元素對合金顯微組織與力學性能的影響。
Sn、Zr、Mo對Ti35Nb基合金組織與力學性能的影響Influence of Sn, Zr and Mo elements on microstructure and
mechanical properties of Ti35Nb based alloys
根據鈦合金相關設計理論，采用無細胞毒性的合金元素Nb、Sn、Zr和Mo設計具有低彈性模量的近β型Ti35Nb-Sn-Zr-Mo五元鈦合金，研究Sn、Zr和Mo合金元素對合金顯微組織與力學性能的影響。結果表明：所設計合金在800
℃固溶后的組織均為單一β等軸晶組織；平均晶粒尺寸隨著Sn與Zr含量的增加而減小，而隨著Mo含量的增加先減小后增大。隨著Sn、Zr和Mo合金元素的增加，合金強度隨之升高，而伸長率逐漸下降，彈性模量隨著Sn和Mo含量的增加而升高，而隨著Zr含量的增加先下降后升高。固溶處理后，具有最高容許應變的合金為Ti35Nb2Sn6Zr3Mo，其抗拉強度、屈服強度、彈性模量以及伸長率分別為664
MPa、641 MPa、59 GPa以及12.5%。
Metastable β-type Ti35Nb-based alloys containing
non-toxic elements Nb, Sn, Zr and Mo and with relative low elastic moduli, were
designed based on the relative design theories of titanium alloys. The influence
of Sn, Zr and Mo alloying elements on the microstructure and mechanical
properties of the alloys was investigated. The results show that the designed
alloys are all composed of single β phase after solid solution treatment at 800
℃. The average grain sizes decrease with increasing Sn and Zr contents, while
they decrease first and then increase with increasing Mo content. The strength
of the alloys increases while the elongation decreases with increasing Sn, Zr
and Mo contents. The elastic moduli of the alloys increase with increasing Sn
and Mo contents, while they decrease first and then increase with increasing Zr
content. The ultimate tensile strength, yield strength, elastic modulus and
elongation of the Ti35Nb2Sn6Zr3Mo alloy with the highest allowable strain are
664 MPa, 641 MPa, 59 GPa and 12.5%, respectively.
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