Tensile Properties of Low Nickel Austenitic Stainless Steel at Elevated Temperatures
(0) The elevated temperature short-time tensile test with the sample of casting low nickel stainless steel was conducted on SHIMADZU AG-10 at ten temperatures 300, 500, 600, 700, 800, 950, 1000, 1050, 1100, and 1250℃, respectively. The stress-strain curves with the thermal deformation at the different temperatures, the peak stress intensity-temperature curve, and the reduction percentage of cross sectional area-temperature curve were obtained. Metallographic test samples were prepared and the morphology of deforming zone was observed by optical microscopy. The experimental results show that the tensile strength of the test samples decreases with increasing temperature. From 300 to 800℃, the work harding occurred and the tensile strength increases with increasing strain. The work softening occurred and the tensile strength decreases with increasing strain at temperatures of 800 to 1250℃. The minimum value of reduction percentage was measured at 800 ℃. The austenite and delta-ferrite are the main phase in the tested samples. When the tensile temperatures are increased to 1200℃, the delta-ferrite became thinner and broke down to be spheroidized.
low nickel stainless steel the elevated temperature
LIU Shu-min FAN Ding JI Gen-shun ZHANG Jian-bin
State Key Lab.of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology,Lanzhou State Key Lab.of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology,Lanzhou
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
249-251
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）