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Hot deformation characteristics of as-cast high-Cr ultra-super-critical rotor steel with columnar grains 被引量:4
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作者 Zong-ye Ding Qiao-dan Hu +1 位作者 Long Zeng Jian-guo Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2016年第11期1275-1285,共11页
Isothermal hot compression tests of as-cast high-Cr ultra-super-critical(USC) rotor steel with columnar grains perpendicular to the compression direction were carried out in the temperature range from 950 to 1250... Isothermal hot compression tests of as-cast high-Cr ultra-super-critical(USC) rotor steel with columnar grains perpendicular to the compression direction were carried out in the temperature range from 950 to 1250°C at strain rates ranging from 0.001 to 1 s^(-1). The softening mechanism was dynamic recovery(DRV) at 950°C and the strain rate of 1 s^(-1), whereas it was dynamic recrystallization(DRX) under the other conditions. A modified constitutive equation based on the Arrhenius model with strain compensation reasonably predicted the flow stress under various deformation conditions, and the activation energy was calculated to be 643.92 kJ ×mol^(-1). The critical stresses of dynamic recrystallization under different conditions were determined from the work-hardening rate(θ)–flow stress(σ) and-θ/σ–σ curves. The optimum processing parameters via analysis of the processing map and the softening mechanism were determined to be a deformation temperature range from 1100 to 1200°C and a strain-rate range from 0.001 to 0.08 s^(-1), with a power dissipation efficiency η greater than 31%. 展开更多
关键词 rotor steel columnar grains dynamic recrystallization constitutive models critical conditions processing maps
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Molecular Dynamics Simulation for Grain Boundary Deformation under Tensile Loading Condition
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《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第1期145-146,共2页
关键词 SIMULATION Molecular Dynamics Simulation for grain Boundary Deformation under Tensile Loading Condition
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Conditional genes for grain yield in rice
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作者 GUO Longbiao~(1,2)) LUO Lijun~(3)) XING Yongzhong~(4)) MEI Hanwei~(3)) QIAN Qian~(1)) YING Chunshan~(1)) SHI Chunhai~(2)) 1)CNRRI,Hangzhou 310006 2)Zhejiang Univ,Hangzhou 310029 +1 位作者 3)Shanghai Agrobiological Gene Center,Shanghai 201106 4)The National Key Lab of Crop Genetic Improvement,Huazhong Agri Univ,Wuhan 430070,China 《Chinese Rice Research Newsletter》 2002年第3期9-9,共1页
Grain yield in cereal crops was an eternal theme.The number of panicles perplant(PN),filled spikelets per panicle(FSP),and 1000-grain weight(TGW)were the three important yield components.Some QTLs for rice yield had b... Grain yield in cereal crops was an eternal theme.The number of panicles perplant(PN),filled spikelets per panicle(FSP),and 1000-grain weight(TGW)were the three important yield components.Some QTLs for rice yield had beenmapped,but conditional QTLs for grain yield had not been analyzed.Phenotypicvalues of yield traits,which had no influence on the given components,wereused for QTLs conditional analysis.This study was to uncover conditional QTLsfor rice yield in a RIL population,and to search for evidences on the geneticbasis of yield QTLs. 展开更多
关键词 QTLS Conditional genes for grain yield in rice RIL
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