Creep strengthening by lath boundaries in 9Cr ferritic heat-resistant steel

被引：37

作者：

Mitsuhara, Masatoshi ^{[1
]}

Yamasaki, Shigeto ^{[1
]}

Miake, Masaki ^{[2
]}

Nakashima, Hideharu ^{[1
]}

Nishida, Minoru ^{[1
]}

Kusumoto, Junichi ^{[3
]}

Kanaya, Akihiro ^{[4
]}

机构：

[1] Kyushu Univ, Dept Engn Sci Elect & Mat, Fukuoka, Japan

[2] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Fukuoka 812, Japan

[3] Kyushu Elect Power Co Inc, Res Inst, Div Engn, Fukuoka, Japan

[4] Fukuoka Clean Energy Co Inc, Dept Engn, Fukuoka, Japan

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2016年 / 96卷 / 02期

基金：

日本学术振兴会;

关键词：

in situ electron microscopy; dislocations; heat-resistant steel; transmission electron microscopy; creep; martensites; MARTENSITE; STABILITY; BEHAVIOR;

D O I：

10.1080/09500839.2016.1154200

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The interactions between dislocations and lath boundaries in Grade 91 steel were observed by an in situ transmission electron microscopy tensile test at 973K. Dislocations glided slowly and bowed out in a martensite lath interior. The ends of the dislocation were connected to the lath boundaries. In a tempered specimen, the pinning stress caused by the lath boundary was estimated to be>70MPa with a lath width of 0.4 mu m. In crept specimens, lath coarsening reduced the pinning effect.

引用

页码：76 / 83

页数：8

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