Effects of ternary additions on martensitic transformation of TiAu
Effects of ternary additions on martensitic transformation of TiAu
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DOI：
10.1016/j.msea.2006.01.123
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发表时间：
2006-11
期刊：
影响因子：
6.4
通讯作者：
T. Kawamura;Ryosuke Tachi;T. Inamura;H. Hosoda;K. Wakashima;K. Hamada;S. Miyazaki
中科院分区：
文献类型：
--
作者：
T. Kawamura;Ryosuke Tachi;T. Inamura;H. Hosoda;K. Wakashima;K. Hamada;S. Miyazaki
研究了 Ti-Au 合金体系中三元元素添加对马氏体转变起始温度 (Ms) 的影响以及控制 Ms 的因素。选择的三元元素X是Fe、Co、Ni、Cu、Ru、Rh、Pd、Ag、Ir和Pt，它们取代了Au位点。三元元素的浓度选择为1和3mol%。 Ti50(Au,X)50合金是通过Ar弧熔炼然后在1173K下均匀化3.6ks制备的。 Ms是通过差示扫描量热法测量的。发现无论三元添加如何，通过θ-2θ X射线衍射鉴定的室温下的表观相均为B19。从B19马氏体相的电子原子比(e/a)、价电子数(Ne)、门捷列夫数(NM)和c轴与b轴晶格参数比(c/b)方面讨论了Ms与添加1mol%X的Ms变化(ΔMs)之间的相关性。发现Ms随着三元添加量的增加而线性减小，并且例如，Ru的ΔM为-40K/mol%，Cu的ΔM为-5K/mol%。此外，还给出了Mson与上述因素的相关性，并得到了线性相关性。
The effects of ternary element additions on martensitic transformation start temperature (Ms) and factors for controlling Mswere investigated for the Ti–Au alloy systems. The ternary elements X selected were Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Ir and Pt, which substitute for the Au sites. The concentration of ternary elements was chosen to be 1 and 3mol%. The alloys of Ti50(Au, X)50were fabricated by Ar arc-melting followed by a homogenization at 1173K for 3.6ks. Mswas measured by differential scanning calorimetry. It was found that the apparent phases at room temperature identified by θ−2θ X-ray diffraction were B19 regardless of ternary additions. The correlations between Msor the change in Msby adding 1mol% of X (ΔMs) are discussed in terms of electron atom ratio (e/a), valence electron number (Ne), Mendeleev number (NM) and lattice parameter ratio between c- and b-axes (c/b) of B19 martensite phase. It was found that Msdecreases linearly with increasing amount of ternary additions and that ΔMsis −40K/mol% for Ru and −5K/mol% for Cu, for example. Besides, the dependence of Mson the above factors is presented and linear correlations are obtained.