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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.2; Jul 7-11, 2003; Leganes, Madrid, Spain >FORMATION OF ULTRA-FINE GRAINED SUS316L STEELS BY BALL-MILLING AND THEIR MECHANICAL PROPERTIES AFTER NEUTRON IRRADIATION
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FORMATION OF ULTRA-FINE GRAINED SUS316L STEELS BY BALL-MILLING AND THEIR MECHANICAL PROPERTIES AFTER NEUTRON IRRADIATION

机译：球磨超细晶粒SUS316L钢的形成及其中子辐照后的力学性能

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摘要

In order to overcome the irradiation embrittlement in austenitic stainless steels, ultra-fine grained SUS316L steels with very fine TiC particles have been developed. The SUS316L-TiC nanocomposite powders having 1.0 to 2.0 mass % TiC were prepared by ball-milling SUS316L-TiC powder mixtures for 125 h in an argon gas atmosphere. The milled powders were consolidated by hot isostatic pressing (HIP) under a pressure of 200 MPa at temperatures between 700 and 1000℃, and the bulk materials with grain sizes between 100 and 400 nm have been produced. The possibility of using fine-grained TiC particles to pin grain boundaries and thereby maintain the ultra-fine grained structures has been discussed. In order to clarify the effects of the neutron irradiation on mechanical properties of the ultra-fine grained SUS316L steels, Vickers microhardness measurements were performed before and after the irradiation of 1.14 x 10~(23) n/m~2 and 1.14 x 10~(24) n/m~2. The hardness increased with increasing the dose of the irradiation. However, these increasing rates of the ultra-fine grained steels were much smaller than those of the coarse-grained SUS3 16L steels having grain sizes between 13 and 50μm.
机译：为了克服奥氏体不锈钢中的辐照脆化，已经开发了具有非常细的TiC颗粒的超细晶粒SUS316L钢。通过在氩气气氛中球磨SUS316L-TiC粉末混合物125小时来制备具有1.0至2.0质量％TiC的SUS316L-TiC纳米复合粉末。通过在700和1000℃之间的温度下在200 MPa的压力下通过热等静压（HIP）固结研磨的粉末，已生产出粒度在100和400 nm之间的块状材料。已经讨论了使用细晶粒的TiC颗粒钉扎晶界从而维持超细晶粒结构的可能性。为了阐明中子辐照对超细晶粒SUS316L钢力学性能的影响，在辐照1.14 x 10〜（23）n / m〜2和1.14 x 10〜之前和之后进行维氏显微硬度测量。 （24）n / m〜2。硬度随着照射剂量的增加而增加。但是，这些超细晶粒钢的增加速率远小于晶粒度在13和50μm之间的SUS3 16L粗晶粒钢。

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