Z - zircaloy 中文 - EN166

zircaloy n.鋯合金〔具有耐熱、耐腐蝕等特性，常在原子反應堆中用以...

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In this dissertation , the effect of texture , heat - treatment , and hydrogen on the lcf behavior of zircaloy - 4 and the cyclic deformation behavior for zircaloy - 4 , n18 alloy and n36 alloy have been investigated systematically using fully - reversed tension - compression loading under strain control ( r = min / max = - 1 ) , while the evolvement of the friction and back stresses versus the number of repeated working cycles and the plastic strain amplitude has been studied , and the thorough discussion combined with the analysis result of fatigue sub - structure , friction and back stresses , and fatigue fracture has been given to the mechanism underlying the lcf behavior of alloys 本文采用對稱拉壓循環變形方法( r _ = _ ( min ) _ ( max ) = - 1 ) ，系統研究了織構、熱處理狀態、氫對zr - 4合金低周疲勞性能的影響， zr - 4合金、 n18合金和n36合金的循環變形行為，并研究了摩擦應力、背應力隨循環周次、塑性應變幅的變化規律。結合疲勞亞結構和疲勞斷口的分析結果，深入探討了影響合金低周疲勞行為的作用機制。
So it is very important to understand the cyclic deformation behavior of zircaloy - 4 . in this paper , bauschinger effect of zircaloy - 4 with different metallurgical state at room temperature and 400 ? is investigated in an incremental step test and cyclic deformation test under constant strain control . bauschinger effect during cyclic deformation is described by using back stress , which is mainly responsible for bauschinger effect ; back stress is attained by using kwl “ s method 本文采用單試樣逐級加載循環變形和恒應變幅循環變形試驗，研究了不同冶金狀態、溫度、氫以及固溶處理下的zr - 4合金的bauschinger效應現象；種種結果表明，影響bauschinger效應的主要因素是背應力；本文正是從背應力的角度來分析各種狀態下zr - 4合金的bauschinger效應現象；背應力的計算主要通過使用kwl方法而獲得。
While cyclic deformation experiment under constant strain control is performed in 400 , the material shows the continuous hardening until cyclic invalidation . ( 3 ) back stress attained by kwl “ s method is used to analyse the bauschinger effect during an incremental step cyclic test and cyclic deformation test under constant strain control , it is shown that back stress increases with increasing plastic strain and the numbers of cycle , and the back stress is uniform , regardless of tension or compression conditions . ( 4 ) as far as recrystallized zircaloy - 4 plate is concerned , the back stress in transverse direction is higher than that in rolling direction due to the higher schmid factor in rolling direction 對于再結晶狀態的zr一4合金板材試樣來說， t方向(橫向)試樣的背應力要高于r方向(軋制方向)的背應力，原因在于r方向的schmid因子高于t方向的schmid因子; 400下， zr一4合金的背應力要明顯低于室溫下的背應力;含氫200pg / g的zr一4合金的背應力大小與無滲氫的zr一4合金背應力相比，無明顯區別;固溶處理后， zr一4合金的背應力大小發生了變化，在較高塑性應變下，背應力均高于固溶處理前的背應力。
The lcf behavior of a recrystallized zircaloy - 4 plate at room temperature and 400 show that alloy has better lcf property at rt than at 400 , and cyclic hardening at 400 which could be attributed to the dynamic strain aging effects . it is noticeable that the hydrided plate has the same cyclic behavior as the above unhydrided sample at room temperature 在400下，合金表現出與常溫下不同的循環特性，其循環穩定滯后回線出現鋸齒狀波形，且在整個疲勞過摘要程中呈現出一致循環硬化的現象，這主要是因為合金在400下發生動態應變時效效應的結果。
Zircaloy - 4 sheet , which was cold - worked followed by recrystallization annealing , exhibits longer lcf life in the rolling direction than that in the transverse direction , and the fact that difference in lcf life between both directions becomes larger as the range of plastic strain becomes lower can be attributed to the texture effect , p - solution treatment deteriorates the alloy ' s lcf property because the treatment lowers the average value of alloy ' s schmid factors , and the subsequent annealing - treatment in a - phase range has a impact on the lcf properties , i . e . the subsequent annealing - treatment at 500 ? for 1 . 5h results in better property than that at 750 for 1 . 5h , which comes mainly from the fact that the alloy annealled at 500 for 1 . 5h has lower amount of the precipitate particles than the alloy annealled at 750 for 1 . 5h 對于冷加工后經再結晶退火處理的zr - 4合金，軋制方向的低周疲勞壽命比橫向要大。隨著_ p的降低，兩個方向的低周疲勞壽命的差別相應增加，這是由于合金中存在織構的緣故。冷加工后經再結晶退火處理的zr - 4合金在固溶處理后，抗疲勞性能明顯降低，這主要是由于固溶處理降低了合金的schmid因子；固溶處理后在相區的退火對疲勞性能有影響，即500 1 . 5h退火的抗疲勞性能要優于750 1 . 5h退火，這主要與500 1 . 5h退火的合金中沉淀相粒子的數量較少有關。
Low cycle fatigue ( lcf ) behavior of zircaloy - 4 has been reviewed in the present paper . then , the lcf behavior of a recrystallized zircaloy - 4 plate with different texture has been studied at room temperature and 400 , respectively 并在此基礎上，研究了不同溫度(室溫和400 ) 、不同取向(平行于軋向和垂直于軋向)的再結晶退火態zr - 4合金板材試樣的低周疲勞性能。
Zircaloy - 4 is generally used as fuel tubes in pressurized water reactors because of it “ s low neutron absorption cross - section , excellent corrosion resistance , good strength and ductility 由于鋯4合金具有低的中子吸收截面，良好的抗腐蝕能力、高強度以及延展性好的特點，被廣泛用于壓水堆作為核燃料棒的包殼材料。
The cyclic deformation behavior for zircaloy - 4 , n18 alloy and n36 alloy at room temperature and 400 has been investigated in a single - sample test or multi - sample test 用單試樣法或多試樣法，研究了錯合金在室溫和400的循環變形。
Furthermore , the lcf behavior of hydrided zircaloy - 4 plate has been also investigated 且進一步探討了氫對zr - 4合金的低周疲勞性能的影響。
Zirconium alloy zircaloy fuel cladding 鋯合金燃料棒包殼
Mechanism of lioh aqueous solution accelerating corrosion rate of zircaloy 4合金腐蝕速率的機理