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张凤英,梅敏,杨雪坤,邱莹,胡腾腾.激光立体成形Ti-25V-15Cr合金的阻燃性能研究[J].稀有金属材料与工程(英文),2018,47(6):1771~1778.[Fengying Zhang,Min Mei,Xuekun Yang,Ying Qiu and Tengteng Hu.Investigation on burn-resistant property of laser solid forming of Ti-25V-15Cr alloy[J].Rare Metal Materials and Engineering,2018,47(6):1771~1778.]
Investigation on burn-resistant property of laser solid forming of Ti-25V-15Cr alloy
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Received:September 03, 2017  Revised:November 06, 2017
DOI:
Key words: Laser solid formig  Ti-25V-15Cr alloy  Combustion product  Mechanism of resistance to burning
Foundation item:国家自然科学基金(No.51401033),国家重点研发计(No.2016YFB1100103,No.2016YFB0700301),陕西省自然科学基础研究计划(No.2016JQ5022),中国博士后科学基金(2016M592731)
Author NameAffiliation
Fengying Zhang,Min Mei,Xuekun Yang,Ying Qiu and Tengteng Hu  
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Abstract:
      In this study, the burn-resistant property of laser solid forming (LSF) of Ti-25V-15Cr alloy was studied, and compared with that of forging Ti40 alloy. The burn-resistant mechanism was disclosed by combining the analysis of the microstructure of the alloy and the combustion products. The results showed that the burning rate of Ti-25V-15Cr alloy is slightly lower than that of forging Ti40 alloy. The combustion products of Ti-25V-15Cr alloy and Ti40 alloy are mainly composed of a mixture of Ti oxide and V oxide, and the substrate. The area of the Oxide in the combustion product zone of LSF Ti-25V-15Cr is a little smaller than that of forging Ti40. Moreover, the distinct segregation of V and Cr in the grain boundary and subgrain boundary was found in LSF Ti-25V-15Cr alloy. The formation of the dendrites and subgrains in LSF Ti-25V-15Cr increases the micro-defect and leads to the better diffusion capacity of V and Cr, which is responsible for the better resistance to the burning of LSF Ti-25V-15Cr than that of forging Ti40.