摘要
用应力弛豫方法研究了超低碳铌硼微合金钢在８００℃，８５０℃、９００℃和９５０℃下，经过２０％预变形目的等温应变诱导析出行为。样品的透射电镜观察表明：应变诱导析出只在位错线上形核并阻碍位错运动，而位错一旦摆脱钉扎，这种运动位错可以是样品中进一步析出的优先形核位置，从而导致析出分阶段进行。
Stress relaxation tests were employed over the temperature rang 800-950℃ to investigate strain induced precipitation in an ultra-low carbon microalloyed steel after prestrained about 20% . The observation of samples relaxed different time by TEM suggests that strain induced precipitates nucleate only alongdislocations and cause the dislocation movement to be hindered, but once the dislocations escape from the precipitates, these moving dislocations may provides new sites for further precipitation to nucleate.
出处
《材料科学与工程》
CSCD
1994年第2期49-53,65,共6页
Materials Science and Engineering
关键词
铌硼钢
应变诱导析出
合金钢
Nb,B)microalloyed steel, stress relaxation, strain induced precipitates
