retrogression [,retrə'greʃən]

retrogression的基本解释

n.

退步, 倒退, 退化, 后退

• Persist in progress and oppose retrogression !
• 坚持进步，反对倒退！

与retrogression相关的网络例句 [注：此内容来源于网络，仅供参考]

The results show that the highest yield strength and IGC resistance are obtained by 190 ℃/ 60 min retrogression and reaging. But when the alloy is treated near the lowest value of hardness curve of retrogression, the lowest IGC resistance is gotten by 190 ℃/4 min retrogression treatment.

结果表明：合金经190℃/60min回归和再时效处理，屈服强度最高，抗晶间腐蚀能力最好，具有最佳的综合性能；但合金在接近回归硬度曲线的谷值时，经190℃/4min回归处理，抗晶间腐蚀性能最差。

The results show that proper RRA heat treatment can improve SCC properties with retention of the high strength of T6 level. After preaging at 100℃for 24 h, retrogression at 200℃for 7 min, and reaging at 100℃for 24 h, the ultimate tensile strength, yield strength and elongation of the alloy are 795 MPa, 767 MPa and 9.1%, respectively. Meanwhile the failure time of the alloy applied to tensile strength of 210MPa in 3.0%NaCl+0.5%H2O2corrosion condition is longer than 720 h. The corresponding TEM observation shows that after retrogression for 7 min and re-aging treatment, the microstructure of grain boundary is similar to that treated in the T73 condition with coarsen and isolated distribution, and the microstructure inside grain is similar to that treated in the T6 condition with small and homogeneous distribution.

研究结果表明：在峰值时效T6状态下合金强度高，但抗应力腐蚀性能差；采用合适的RRA热处理工艺既能使合金保持T6状态下的高强度的同时，又能显著改善合金的抗应力腐蚀性能；经回归7 min RRA处理后合金的晶界类似T73态析出相聚集粗化，而晶内类似T6态析出相细小弥散分布，在拉伸应力为210 MPa和3.0%NaCl+0.5%H2O2腐蚀液中，其断裂时间大于720 h，相应的抗拉强度、屈服强度和延伸率分别为795 MPa， 767 MPa和9.1%，显示优越的综合性能。

The results show that proper RRA heat treatment can improve SCC properties with retention of the high strength of T6 level. After pre-aging at 100 ℃ for 24 h, retrogression at 200 ℃ for 7 min, and reaging at 100 ℃ for 24 h, the ultimate tensile strength, yield strength and elongation of the alloy are 795 MPa, 767 MPa and 9.1%, respectively. Meanwhile the failure time of the alloy applied to tensile strength of 210 MPa in 3.0%NaCl+0.5%H2O2 corrosion condition is longer than 720 h. The corresponding TEM observation shows that after retrogression for 7 min and re-aging treatment, the microstructure of grain boundary is similar to that treated in the T73 condition with coarsen and isolated distribution, and the microstructure inside grain is similar to that treated in the T6 condition with small and homogeneous distribution.

研究结果表明：在峰值时效T6状态下合金强度高，但抗应力腐蚀性能差；采用合适的RRA热处理工艺既能使合金保持T6状态下的高强度的同时，又能显著改善合金的抗应力腐蚀性能；经回归7 min RRA处理后合金的晶界类似T73态析出相聚集粗化，而晶内类似T6态析出相细小弥散分布，在拉伸应力为210 MPa和3.0%NaCl+0.5%H2O2腐蚀液中，其断裂时间大于720 h，相应的抗拉强度、屈服强度和延伸率分别为795 MPa， 767 MPa和9.1%，显示优越的综合性能。

与retrogression相关的网络解释 [注：此内容来源于网络，仅供参考]

retrogression：退步

他曾在>第7章中说:"(天择)的最后结果,包括了生物体的进步(advance)及退步(retrogression)两种现象". 而后来包括达尔文在内,之所以改用evolution来描述生物演化现象,是经由英国哲学家赫伯特.史宾赛在许多著作里进行的名词统一.

retrogression：逆行

后两次连珠是因为天体相对运动导致的逆行(retrogression)而有. 这三次连珠的轨迹,如同"君王行星"在"君王恒星"头上来回划上一顶皇冠,引人注目. 有趣的是,头等星Regulus在狮子座里刚好位於狮子前腿之间. 记得以色列先祖雅各死前给儿子犹大祝福预告:圭必不离开犹大,

retrogression：衰退

retrograde ejaculation 倒行射精 | retrogression 衰退 | retrogressive evolution 后退演化

retrogression：后退

retrograde wave 後退波 | retrogression 後退 | retroreflection 回反射

strength retrogression：强度衰退

strength of water drive 水驱强度 | strength retrogression 强度衰退 | strength test 强度试验