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首页> 外文会议>EPD congress;TMS annual meeting exhibition >EVALUATION OF THERMAL AGING EMBRITTLEMENT OF AUSTENITIC STAINLESS STEELS JN1, JJ1 AND JK2 STEELS BY CRYOGENIC SMALL-PUNCH TESTING
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EVALUATION OF THERMAL AGING EMBRITTLEMENT OF AUSTENITIC STAINLESS STEELS JN1, JJ1 AND JK2 STEELS BY CRYOGENIC SMALL-PUNCH TESTING

机译：奥氏体不锈钢JN1，JJ1和JK2钢的热老化刻蚀的低温小冲刺试验评估

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Small-punch tests were conducted at 4, 77 and 293 K on three types of austenitic stainless steels JN1, JJ1 and JK2, which were solution treated, water-quenched and then aged at 923, 973, 1023 and 1073 K for 5 h. Small-punch test energy was employed for the evaluation of the aging induced embrittlement behavior in these materials. Fracture surface of small punch test specimen for the solution treated steels exhibited a ductile fracture, showing the highest SP test energy values. The presence of intergranular brittle fracture was observed in aged specimens. Small punch test energy decreased significantly as the aging process progressed. The highest and lowest decrease in small-punch test energy with aging temperature occurred in JN1 and JK2 steels, respectively. The decrease in small-punch test energy showed to examine appropriately the aging-induced embrittlement in these materials. The difference in aging-induced embrittlement behavior for these steels was explained based on the volume fraction of intergranular precipitates in aged samples.
机译：对三种类型的奥氏体不锈钢JN1，JJ1和JK2分别在4,77和293 K进行了小打孔测试，将其固溶处理，水淬后在923、973、1023和1073 K时效5 h。小冲头测试能量被用于评估这些材料中的老化引起的脆化行为。固溶处理钢的小冲头试样的断裂表面表现出韧性断裂，显示出最高的SP测试能量值。在老化的标本中观察到晶间脆性断裂的存在。随着老化过程的进行，小冲头测试能量显着降低。随着时间的流逝，小冲孔试验能量的最大和最小降低分别发生在JN1和JK2钢中。小冲头测试能量的降低表明可以适当地检查这些材料中的老化引起的脆化。根据时效样品中晶间析出物的体积分数解释了这些钢的时效诱发脆化行为的差异。

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