Influence of Texture and Grain Size on Martensitic Transformations Occurring During Low-Cycle Fatigue of a Fine-Grained Austenitic Stainless Steel

被引：15

作者：

Poulon, Angeline ^{[1
,2
]}

Brochet, Stephanie ^{[2
]}

Glez, Jean-Christophe ^{[3
]}

Mithieux, Jean-Denis ^{[3
]}

Vogt, Jean-Bernard ^{[2
]}

机构：

[1] Univ Bordeaux, CNRS, ICMCB, F-33608 Pessac, France

[2] Univ Sci & Technol Lille, Lab Met Phys & Genie Mat ENSCL, UMR CNRS 8517, F-59655 Villeneuve Dascq, France

[3] UGINE & ALZ Res Ctr, F-62330 Isbergues, France

来源：

ADVANCED ENGINEERING MATERIALS | 2010年 / 12卷 / 10期

关键词：

BULK NANOSTRUCTURED MATERIALS; SEVERE PLASTIC-DEFORMATION; BEHAVIOR; NUCLEATION;

D O I：

10.1002/adem.201000079

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of grain size and texture on microstructural changes occurring during low-cycle fatigue of an austenitic stainless steel are investigated (grain size of 2 and 20 mu m). All the materials exhibited a strong secondary hardening at high strain range as a result of a fatigue-induced martensitic transformation. alpha' martensite is found to nucleate in austenitic grains containing a high density of dislocations but not at slip band intersections, as is usually reported for austenitic stainless steels. Considering the unstable composition of the steel studied and the decrease of the grain size, dislocations structures inside austenite grains are unchanged but cyclic solicitation promotes the induced transformation of austenitic phase. Localization of the martensite grains formed depends on the grain texture and the grain size inside which nucleus are formed.

引用

页码：1041 / 1046

页数：6

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