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真空處理和Ti含量對Mo-0.1Zr合金性能與顯微
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國家自然科學基金創(chuàng)新研究群體科學基金（50721003）


Effect of Vacuum Treatment and Ti Content on the Properties and Microstructure of Mo-0.1Zr Alloy
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    摘要:

    將粉末高能球磨，經(jīng)壓制、預燒、高溫燒結(jié)和真空處理，制備Mo-0.1Zr(質(zhì)量分數(shù), 下同)和含有不同Ti含量的Mo-0.1Zr-nTi(n分別為0.4，0.55，0.7，0.9)合金。研究真空處理和Ti含量對Mo-0.1Zr合金性能和組織結(jié)構(gòu)的影響。結(jié)果表明，真空處理能夠使Mo-0.1Zr合金的性能大大提高，尤其使合金的延伸率達到25.6%，達到甚至超過了鍛造態(tài)合金的延伸率，合金的斷口也由真空處理前的沿晶斷裂特征轉(zhuǎn)變?yōu)槊黠@的穿晶斷裂。Ti的添加，使Mo-0.1Zr合金生成了(Mo,Ti)xOy第二相粒子，第二相粒子存在于晶界之間，并隨著Ti添加量的增加而增加，從而使合金的力學性能隨Ti添加量的增加而下降

    Abstract:

    In order to reveal the effect of vacuum treatment and Ti content on the properties and microstructure of Mo-0.1Zr alloy, Mo-0.1Zr and Mo-0.1Zr-nTi (n=0.4, 0.55, 0.7 and 0.9) alloys were prepared via powder metallurgy processes and final vacuum treatment was adopted. The result shows that the mechanical properties of Mo-0.1Zr alloy were enhanced greatly by the vacuum treatment, especially the elongation of the alloy (25.6%), much higher than that of the forged Mo alloys. Simultaneously, obvious transgranular fracture was observed on the fracture surface after vacuum treatment instead of the intergranular fracture. It induces the generation of (Mo,Ti)xOy second-phase particles by adding element Ti into the Mo-0.1Zr alloy, which exists in the grain boundaries. With the increase of Ti content, the amount of second-phase particles increases and leads to the reduction of mechanical properties of the alloys

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范景蓮,成會朝,,盧明園,田家敏.真空處理和Ti含量對Mo-0.1Zr合金性能與顯微[J].稀有金屬材料與工程,2010,39(2):338~342.[Fan Jinglian, Cheng Huichao, Lu Mingyuan, Tian Jiamin. Effect of Vacuum Treatment and Ti Content on the Properties and Microstructure of Mo-0.1Zr Alloy[J]. Rare Metal Materials and Engineering,2010,39(2):338~342.]
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  • 收稿日期:2009-03-26
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