X-Ray Quantitative Analysis of Transformed Martensite in Austentic Stainless Steel

1995 ◽  
Vol 39 ◽  
pp. 481-489
Author(s):  
Zenjiro Yajima ◽  
Yoichi Kishi ◽  
Yukio Hirose
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Fracture Surface ◽  
Fatigue Fracture ◽  
Volume Fraction ◽  
Line Broadening ◽  
Fatigue Fracture Surface ◽  
Type Specimens ◽  
Ray Method ◽  
X Ray

Austenitic stainless steel has large toughness and high corrosion resistance compared to other alloy steels. The austenite near the fracture surface will be transformed to the martensite when it is fractured. In the present study, X-ray fractography is applied to a fatigue fracture surface of austenitic stainless steel. The fatigue tests were carried out on compact tension ( CT ) type specimens. The volume fraction of transformed martensite was quantitatively evaluated on fatigue fracture surfaces by the X-ray method. The plastic strain on the fracture surface was estimated by measuring the line broadening of X-ray diffraction profiles. The size of plastic zone left on the fatigue fracture surface was determined from the distribution of the line broadening

X-Ray Fractographic Study on Fatigue Fracture Surface of Ductile Cast Iron

1993 ◽  
Vol 37 ◽  
pp. 327-334
Author(s):  
Akira Suzuki ◽  
Yoichi Kishi ◽  
Zenjiro Yajima ◽  
Yukio Hirose
Keyword(s):  
Cast Iron ◽  
Fracture Surface ◽  
Fatigue Fracture ◽  
Retained Austenite ◽  
Volume Fraction ◽  
Compact Tension ◽  
Fatigue Tests ◽  
Ductile Cast Iron ◽  
Fatigue Fracture Surface ◽  
X Ray

Austempered ductile cast iron (ADI) has composite microstructures, which are martensite/retained austenite structures. ADI has very large toughness compared to other ductile cast irons. After fracture, the retained austenite near the fracture surface will be transformed to martensite. In the present study, X-ray fractography is applied to fatigue fracture surface of ADI. The fatigue tests were carried out on compact tension (CT) specimens. The volume fraction of retained austenite was quantitatively measured on and beneath fatigue fracture surfaces. The plastic strain on the fracture surface was estimated from measuring the line broadening of X-ray diffraction profiles. The depth of the plastic zone left on fracture surface was evaluated from the distributions of the volume fraction of retained austenite. The results are discussed on the basis of fracture mechanics.

X-ray Fractography on Fatigue Fractured Surface of Austenitic Stainless Steel

1994 ◽  
Vol 38 ◽  
pp. 443-453
Author(s):  
Zenjiro Yajima ◽  
Hideki Tokuyama ◽  
Yasuo Kibayashi ◽  
Yukio Hirose
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Fatigue Fracture ◽  
Solution Treatment ◽  
Compact Tension ◽  
Fatigue Tests ◽  
Line Broadening ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fracture Surfaces

X-ray diffraction observation of the material internal structure beneath fracture surfaces provide fracture analysis with useful information to investigate the conditions and mechanisms of fracture. X-ray fractography is a generic name given to this technique. In the present study, X-ray fractography was applied to fatigue fracture surfaces of austenitic stainless steel (AISI 304) which consisted of solution treatment. The fatigue tests were carried out on compact tension (CT) specimens. The plastic strain on the fracture surface was estimated from measuring the line broadening of X-ray diffraction profiles. The line broadening of X-ray diffraction profiles was measured on and beneath fatigue fracture surfaces. The depth of the plastic zone left on fracture surfaces was evaluated from the line broadening. The results are discussed on the basis of fracture mechanics.

X-ray fractographic study on fatigue fracture surface of structural steels.

1985 ◽  
Vol 51 (465) ◽  
pp. 1477-1482 ◽  
Author(s):  
Keiji OGURA ◽  
Yoshio MIYOSHI ◽  
Masahiro KAWAGUCHI ◽  
Masahiro KAYAMA
Keyword(s):  
Fracture Surface ◽  
Fatigue Fracture ◽  
Structural Steels ◽  
Fatigue Fracture Surface ◽  
X Ray ◽  
Fractographic Study

316 X-Ray Fractography of Fatigue Fracture Surface under Mode(I + III) Loding

2001 ◽  
Vol 2001.50 (0) ◽  
pp. 157-158
Author(s):  
Yoshiaki AKINIWA ◽  
Keisuke TANAKA ◽  
Tsuyoshi TSUMURA
Keyword(s):  
Fracture Surface ◽  
Fatigue Fracture ◽  
Mode I ◽  
Fatigue Fracture Surface ◽  
X Ray
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