摘要
用差示扫描量热仪（ＤＳＣ－７）测量试样的转变焓（ΔＨ）和转变温度（Ｍｓ，Ａｓ，Ａｆ）。试验预变形量分别为０％、６％和８％，加热和冷却速度分别为１００Ｋ／ｍｉｎ和２０Ｋ／ｍｉｎ。结果表明，合金在１０００Ｋ下退火ε→γ转变没有全部进行。热循环不仅降低Ａｓ点也降低Ａｆ点。随着预应变量增加，转变焓增加，Ａｓ点降低。
Transformation enthalpy (Δ H ) and transformation temperature (Ms,As,Af)of Fe Mn Si Cr Ni alloy were measured by Differential Scanning Calorimeter (DSC 7).Before measurement some specimens were prestrained by 0%,6%or 8%.The heating and cooling rates were 100K/min and 20K/min respectively.The results show the ε→γ transformation is not complete after an annealing at 1000K.The thermal cycle not only decreases As but also Af.The transformation enthalpy(Δ H ε→γ)increases and As decreases with the prestrain increases.
出处
《金属热处理》
CAS
CSCD
北大核心
1998年第11期10-11,共2页
Heat Treatment of Metals
关键词
铁基
形状记忆合金
ε→γ转变
热分析
Fe Mn Si Cr Ni shape memory alloy,ε→γ transformation,calorimetric measurement
