Potential application of nanocrystalline 301 austenitic stainless steel in lightweight vehicle structures
Potential application of nanocrystalline 301 austenitic stainless steel in lightweight vehicle structures
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DOI：
10.1016/j.matdes.2009.03.043
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发表时间：
2009-10-01
影响因子：
8.4
通讯作者：
Karimi, M.
中科院分区：
文献类型：
--
作者：
Eskandari, M.;Najafizadeh, A.;Karimi, M.
近年来，纳米/超细晶粒钢已成为轻量化结构领域的研究热点。在本工作中，为了在铸态AISI301不锈钢中获得纳米晶组织，研究了热机械参数的影响。在1200℃均质化9h后，在温度1000~1200℃、应变值0.8、应变速率1.2 S(-1)的条件下进行热轧，可获得最小的晶粒度为18微米。然后将产品在1050℃下进行3分钟的退火热处理。为了获得纳米晶结构，采用了重复冷轧和随后的退火工艺。冷轧温度为-10℃，应变速率为0.5 S(-1)，压下率为95%，而退火热处理温度为600~850℃，时间为0.5~50min。结果表明，冷轧总变形量为95%后，在850℃下保温1min，可获得晶粒度约为70 nm的纳米晶奥氏体组织。(C)2009爱思唯尔有限公司。保留所有权利。
In recent years, nano/ultrafine grained steels have been the focus of great attention for the construction of lightweight structures. in this work, the effects of thermo-mechanical parameters were investigated in order to achieve a nanocrystalline structure in the as-cast AISI 301 stainless steel. A minimum grain size of 18 mu m was initially achieved when homogenization took place at 1200 degrees C for 9 h followed by hot rolling at a temperature range of 1000-1200 degrees C with a strain value of 0.8 and a strain rate of 1.2 s(-1). The product was then annealed at 1050 degrees C for 3 min. In order to get a nanocrystalline structure, repetitive cold rolling followed by subsequent annealing was used. The cold rolling was carried out at a temperature of -10 degrees C with a strain rate of 0.5 s(-1) and a reduction of 95%, while the annealing treatment was conducted at temperatures of 600 to 850 degrees C for 0.5 to 50 min. The results showed that the nanocrystalline austenitic structure with a grain size of about 70 nm was obtained by annealing at 850 degrees C for 1 min after an overall cold rolling reduction of 95%. (C) 2009 Elsevier Ltd. All rights reserved.