本文選題：EET + 鈦合金　； 參考：《遼寧工業(yè)大學》2017年碩士論文

【摘要】：鈦及鈦合金由于具有比強度高、耐腐蝕、生物相容性好以及優(yōu)秀的高溫性能等優(yōu)點,逐漸成為新興的結構材料。本文以二元鈦合金硬度為研究對象,以固體與分子經驗電子理論(EET)為理論基礎,計算了二元α、β鈦合金以及平衡態(tài)的二元α+β、亞穩(wěn)β鈦合金的硬度,提出了合金硬度的理論計算方法,并設計相關實驗進行驗證。研究結果如下:基于EET,計算了二元α鈦合金中相結構單元α-Ti和α-Ti-M以及相界面α-Ti//α-Ti-M的價電子結構,提出了二元α鈦合金硬度的理論計算方法,并且,在Ti-xAl、Ti-xV和Ti-xZr三個合金體系中對計算方法進行驗證,合金硬度的理論計算值與實驗值的平均誤差分別為4.67%、5.27%和3.85%;基于EET,計算了二元β鈦合金中相結構單元β-Ti和β-Ti-M以及相界面β-Ti//β-Ti-M的價電子結構,提出了二元β鈦合金硬度的理論計算方法,并且,在Ti-xFe、Ti-xV和Ti-xMo三個合金體系中對計算方法進行驗證,Ti-xFe、Ti-xV和Ti-xMo系合金硬度的理論計算值和實驗值的平均誤差分別為2.72%、4.16%和2.3%;基于EET,計算了二元α+β鈦合金平衡態(tài)組織中相結構單元α-Ti、α-Ti-M和β-Ti-M以及相界面α-Ti//α-Ti-M和α-Ti//β-Ti-M的價電子結構,提出了二元α+β鈦合金平衡態(tài)硬度的理論計算方法,并且,用Ti-3Fe、Ti-6V和Ti-6Mo三種α+β鈦合金硬度的理論計算值和實驗值符合較好,平均誤差為4.69%;基于EET,計算了二元亞穩(wěn)β鈦合金平衡態(tài)組織中相結構單元α-Ti、α-Ti-M、β-Ti和β-Ti-M以及相界面α-Ti//α-Ti-M、α-Ti//β-Ti和β-Ti//β-Ti-M的價電子結構,提出了二元亞穩(wěn)β鈦合金平衡態(tài)硬度的理論計算方法,并且,用Ti-7Fe、Ti-18V和Ti-11Mo三種亞穩(wěn)β鈦合金對計算方法進行驗證,合金硬度的理論計算值與實驗值之間的平均誤差為7.57%。
[Abstract]:Titanium and titanium alloys have become new structural materials due to their high specific strength, corrosion resistance, good biocompatibility and excellent high temperature properties.In this paper, the hardness of binary 偽, 尾 titanium alloys and binary 偽 尾, metastable 尾 titanium alloys in equilibrium state are calculated on the basis of solid and molecular empirical electron theory.The theoretical calculation method of alloy hardness is put forward, and relevant experiments are designed to verify it.The results are as follows: based on EETs, the valence electron structures of phase structure units 偽 -Ti and 偽 -Ti-M and phase interface 偽 -Ti / 偽 -Ti-M in binary 偽 -Ti alloy have been calculated, and the theoretical calculation method of hardness of binary 偽 -Ti alloy has been put forward.The calculation method was verified in Ti-xAlnTi-xV and Ti-xZr alloy systems.On the basis of EETs, the valence electron structures of phase structure units 尾 -Ti and 尾 -Ti-M and phase interface 尾 -Ti / 尾 -Ti-M in binary 尾 -Ti alloy were calculated.A theoretical calculation method for the hardness of binary 尾 -titanium alloy is proposed.The average errors of the theoretical and experimental values of the hardness of Ti-xFeNTi-xV and Ti-xMo series alloys are 2.72% and 2.3%, respectively, and the phase junctions in the equilibrium microstructure of binary 偽 尾 titanium alloys are calculated based on the calculation method in the Ti-xFeCo Ti-xV and Ti-xMo alloy systems, which show that the average errors of the theoretical and experimental values are 2.72% and 2.3%, respectively, on the basis of the calculation of the hardness of Ti-xFeCo Ti-xV and Ti-xMo system alloys.The valence electron structures of 偽 -Ti, 偽 -Ti-M and 尾 -Ti-M and phase interface 偽 -Ti / 偽 -Ti-M and 偽 -Ti / 尾 -Ti-M are obtained.The theoretical calculation method of equilibrium hardness of binary 偽 尾 titanium alloy is put forward, and the theoretical and experimental values of the hardness of Ti 3FE Ti 6V and Ti-6Mo 偽 尾 Ti alloy are in good agreement with each other.Three kinds of metastable 尾 -titanium alloys, Ti-7Fe-18V and Ti-11Mo, were used to verify the calculation results. The average error between the calculated values and the experimental values was 7.57.
【學位授予單位】：遼寧工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG146.23

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