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The effect of dopant incorporation on the elastic properties of Ti metal

机译:掺入掺杂剂对钛金属弹性性能的影响

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The effect of dopant atoms on the structural and elastic properties of a titanium is examined through the use of density functional theory. The effect of 66 dopant atoms, from H through the third row transition metal elements, were considered in this study. In all cases the dopant concentration was approximately 3 at%, with substitutional incorporation investigated for all atoms considered and interstitial incorporation investigated for a smaller subset of elements. Interstitial incorporation was calculated to be more energetically favourable for the elements H, B to F, S and Cl with these dopants coordinating octahedrally with the surrounding Ti atoms, while substitutional incorporation was found to be more stable for the other elements. The five independent single crystal elastic constants are calculated, along with the bulk and shear moduli. The energetics and mechanically stability associated with the alloying of various dopants is also discussed.
机译:通过使用密度泛函理论研究了掺杂原子对钛结构和弹性性能的影响。在这项研究中,考虑了从H到第三行过渡金属元素的66个掺杂原子的影响。在所有情况下,掺杂剂浓度约为3 at%,对所有考虑的原子进行了取代结合研究,对较小的元素子集进行了间隙结合研究。计算得出,间隙掺入对元素H,B至F,S和Cl具有更有利的能量,这些掺杂剂与周围的Ti原子八面体配位,而对其他元素而言,取代掺入更稳定。计算了五个独立的单晶弹性常数,以及体积模量和剪切模量。还讨论了与各种掺杂剂合金化相关的能量学和机械稳定性。

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