27 research outputs found
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THE USE OF MICROSTRUCTURE CONTROL TO TOUGHEN FERRITIC STEELS FOR CRYOGENIC USE. I. Fe-Ni STEELS
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THE POINT-OBSTACLE REPRESENTATION OP THE DISLOCATION-OBSTACLE INTERACTION
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Consequences of the re-transformation of precipitated austenite in ferritic cryogenic steels. Technical report No. 8
The re-transformation of precipitated austenite (..gamma../sub R/) in Fe-(6-9)%Ni steels has been investigated, with particular emphasis on the influence of transformation characteristics on alloy toughness at cryogenic temperature. In all cases studied the precipitated austenite re-transforms, either during cooling to cryogenic temperature or during deformation prior to fracture of the alloy. When the re-transformation is thermally induced the product martensite tends to form in a variant identical to that present before precipitation of the austenite; no significant refinement of the microstructure is achieved. On the other hand, mechanical transformation of the austenite produces a distribution of martensite variants determined by the local strain, hence preserving a refined microstructure conducive to low temperature toughness
Neoadjuvant therapy in locally advanced colon cancer: A meta-analysis and systematic review
10.21037/jgo-20-220Journal of Gastrointestinal Oncology115847-85