理化检验-物理分册2017，Vol.53Issue(6)：422-427,433,7.DOI:10.11973/lhjy-wl201706010
金属材料韧脆转变温度检测中的一些关键问题
Some Key Problems in Testing of Ductile-Brittle Transition Temperatureof Metallic Materials
摘要
Abstract
Some problems encountered in the testing of the ductile-brittle transition temperature of metallic materials and corresponding solutions were discussed.The results show that when processing the test data, the fitting functions would have a great influence on the final test result, and the fitting results with Boltzmann function were more practical.The four methods for determining the ductile-brittle transition temperature had their own characteristics, and they should be applied flexibly according to the actual situation.Specimen crystal area profile, fracture flatness, especially the ductile brittle fracture section type would directly affect the evaluation of percent shear fracture, and the sampling location and direction should be indicated in the test report.When the number of specimens was limited, specimens should be allocated in a reasonable range with percent shear fracture of 30%~70% to obtain the ductile-brittle transition temperature.关键词
韧脆转变温度/剪切断面率/冲击吸收能量/侧膨胀值/拟合函数/断口形貌Key words
ductile-brittle transition temperature/percent shear fracture/impact absorbed energy/lateral expansion/fitting function/fracture morphology分类
矿业与冶金引用本文复制引用
许鹤君..金属材料韧脆转变温度检测中的一些关键问题[J].理化检验-物理分册,2017,53(6):422-427,433,7.基金项目
上海材料研究所技术创新资助项目(16SG-15) （16SG-15）
