Effect of pre-deformation of austenite on shape memory properties in Fe-Mn-Si-based alloys containing Nb and C

被引：79

作者：

Baruj, A ^{[1
]}

Kikuchi, T ^{[1
]}

Kajiwara, S ^{[1
]}

Shinya, N ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

MATERIALS TRANSACTIONS | 2002年 / 43卷 / 03期

关键词：

iron based shape memory alloy; shape recovery; shape recovery stress; training process; niobium carbide;

D O I：

10.2320/matertrans.43.585

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The shape memory properties of Fe-Mn-Si-based alloys containing Nb and C are further improved by pre-rolling of the solution-treated austenite and the subsequent ageing treatment. For an Fe-28Mn-6Si-5Cr-0.53Nb-0.06C (mass%) alloy, 9017, of an initial 4% strain is recovered on heating without any previous training treatment, if the alloy in austenitic state is rolled by 6-14% at 870 K and aged at 1070 K for 10 min to produce NbC precipitates. In the same condition, the alloy develops shape recovery stresses of 255 MPa and 295 MPa for 6% and 14% pre-rolling, respectively, when initially deformed by 4.5%. TEM observations indicate that these improved shape memory characteristics are related to a fine distribution of NbC precipitates in the fcc matrix and their interaction with stacking faults.

引用

页码：585 / 588

页数：4

共 7 条

[1] Atomic force microscope study of stress-induced martensite formation and its reverse transformation in a thermomechanically treated Fe-Mn-Si-Cr-Ni alloy [J].