ENVIRONMENTAL STRENGTH OF TRIP STEELS WITH RETAINED AUSTENITE POSSESSING HIGH DUCTILITY AND HYDROGEN-EMBRITTLEMENT RESISTANCE.

具有高延展性和抗氢脆性的残余奥氏体脱扣钢的环境强度。

• 批准号: 05650664
• 负责人: MISAWA Toshihei
• 金额: $ 1.41万
• 依托单位: MURORAN INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650664/
• 关键词: Retained Austenite; TRIP Steels; Ductile Brittle Transition; DBTT; Environmental Strength; Hydrogen Embrittlement; Small Specimen Test Technique; High Strength Sheet Steels; 高強度鋼

The small specimen test technique (SSTT) using miniaturized specimens has been performed for high strength sheets of retained-austenite transformation induced plasticity, martensitic and austenitic steels and laser weld joint to evaluate ductile-brittle transition behavior and hydrogen embrittlement resistance, in comparison with the intermetallics having high susceptibility to hydrogen embrittlement. The small punch (SP) test using a small specimen in the form of 10 x 1 0 x 0.5 mm demonstrated different behavior of ductile-brittle transition, low lemperature ductility and the temperature-dependence Weibull distribution shape parameter and dispersion in SP fracture energies, for two different contents of retained austenitic TRIP steels. An impact testing for the toughness evaluation of local microstructures in laser weld joint using miniaturized v-notch specimens of 0.7,1.0,1.0 mm^2 in square and 20 mm in long has been successfully constructed and a linear correlation between the DBTT … More measured by standard Charpy-impact test and that by the small specimen test has been clarified.The resistance to hydrogen embrittlement of prestressed concrete steels has been largely improved by the addition of Si and Ni with quench-tempered heat treatment. The hydrogen induced ductility loss in the sensitized Type 316 stainless steels has been accompanied by the brittle intergranular cracking and enhanced ductile rapture along grain boundaries at below and above room temperature, respectively. High susceptibility to hydrogen embrittlement in the sensitized Type 316 SS has been attributed to the grain boundary precipitation relating phenomena such as the weakening of interface bonding between carbides and matrix and the martensitic transformation in the Cr-depleted zone near grain boundaries. Behavior and suppression of hydrogen environmental embrittlement in Co_3Ti intermetallic compound have been inbestigated by means of the SP test, electrochemical measurements and tritium autoradiography. The mechanism of the suppression by the additionof Fe is to reduce a supply of hydrogen from the surface to the interior of Co_3Ti due to the increase of hydrogen desorption rate resulting from the enhancement of hydrogen recombination. Less

采用小型试样的小试样试验技术（SSTT），对高强度残余奥氏体相变诱发塑性钢板、马氏体钢和奥氏体钢以及激光焊接接头进行了韧脆转变行为和抗氢脆性能的研究，并与氢脆敏感性高的金属间化合物进行了比较。采用10 × 10 × 0.5 mm的小试样进行的小冲杆（SP）试验表明，对于两种不同含量的残余奥氏体TRIP钢，其韧脆转变、低温塑性和温度依赖性Weibull分布形状参数以及SP断裂能的分散性均不同。采用0.7、1.0、1.0 mm^2方形和20 mm长的小型V形缺口试样，成功地建立了激光焊接接头局部组织韧性评价的冲击试验方法， ...更多信息 本文阐明了用标准夏比冲击试验和小试样试验所测得的氢脆强度的关系，并通过加入Si和Ni，再经淬火-回火热处理，大大提高了预应力混凝土用钢的抗氢脆性能。敏化316不锈钢在室温以下和室温以上的氢致塑性损失分别伴随着沿晶脆性开裂和沿沿着晶界韧性断裂的增强。敏化316不锈钢的高氢脆敏感性归因于与晶界沉淀有关的现象，如碳化物与基体之间的界面结合减弱以及晶界附近贫Cr区的马氏体相变。本文用自然电位试验、电化学测量和氚自显影等方法研究了Co_3Ti金属间化合物的氢环境脆化行为及其抑制。Fe的加入抑制了Co_3Ti中的氢的析出，其机理是由于氢的复合作用增强，使Co_3Ti中的氢的脱附速率增加，从而减少了Co_3Ti表面向内部的供氢。少

项目成果

Hideyuki SAITOH et al.: "Effects Of Atmosphere and Fe Addition on Suppression of Environmental Embrittlement in Co_3Ti Intermetallic Compound." KEIKINZOKE (J.Japan Institute of Light Metals). 44. 635-640 (1994)

Hideyuki SAITOH 等人：“气氛和 Fe 添加对抑制 Co_3Ti 金属间化合物环境脆化的影响”。

Toshihei MISAWA: "Hydrogen Electrode Behavior of Co_3Ti,TiAl Intermetallics Having Environmental Embrittlement Susceptibility" Proc.3rd Japan International SAMPE Symposium. 1438-1443 (1993)

Toshihei MISAWA：“具有环境脆化敏感性的Co_3Ti,TiAl金属间化合物的氢电极行为”Proc.3rd Japan International SAMPE Symposium。

Toshihei MISAWA: "Evaloation of Dutctile-Brittle Transition Behavior of TRIP Sheet Steels by Small Punch Test" TETSU-TO-HAGANE (ISIJ). (to be published).

Toshihei MISAWA：“通过小冲头试验评估 TRIP 钢板的延性-脆性转变行为”TETSU-TO-HAGANE (ISIJ)。

Toshihei MISAWA: "Evaloation of dutctile-Brittle Transition Characteristics of Different Microstructures in Laser Weld Joint by Small Specimen Impact Test" TETSU-TO-HAGANE (ISIJ). (to be published).

Toshihei MISAWA：“通过小样本冲击试验评估激光焊接接头中不同微观结构的延性-脆性转变特性”TETSU-TO-HAGANE (ISIJ)。

Akihiko KIMURA: "Hydrogen Induced Cracking in Type316 Stainless Steels for International Thermonuclear Experimental Reactor" Materials Transactions,JIM. 34. 1097-1105 (1993)

Akihiko KIMURA：“国际热核实验反应堆用 316 型不锈钢的氢致裂纹”材料交易，JIM。