Mechanism of FIB-Induced Phase Transformation in Austenitic Steel.
Mechanism of FIB-Induced Phase Transformation in Austenitic Steel.
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奥氏体钢中 FIB 诱导相变的机制。
DOI：
10.1017/s1431927621013738
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Michael JR
中科院分区：
文献类型：
--
作者：
Michael JR
本文研究了304不锈钢铸造合金在室温下经Ga ~+或Ga ~+离子辐照后，不稳定奥氏体向铁素体或α′马氏体的转变。在各种束/样品几何形状下对304进行受控的Ga+和Ga+离子束曝光。结果表明，Ga ~+和Ga ~+离子辐照均能使奥氏体转变为铁素体或α′马氏体。在本文中，我们将把转变产物称为BCC相。转变区域的晶体取向由奥氏体晶粒的取向控制，并且与Nishiyama-Wasserman或Kurdjumov-Sachs取向关系一致。的基础上的x2+和Ga+离子束曝光，转换是不控制的BCC相的化学稳定的离子种类，但由离子引起的反冲运动和随后返回的无序区域到一个更积极有利的阶段所造成的无序的结果。
The transformation of unstable austenite to ferrite or α′martensite as a result of exposure to Xe+or Ga+ions at room temperature was studied in a 304 stainless steel casting alloy. Controlled Xe+and Ga+ion beam exposures of the 304 were carried out at a variety of beam/sample geometries. It was found that both Ga+and Xe+ion irradiation resulted in the transformation of the austenite to either ferrite or α′martensite. In this paper, we will refer to the transformation product as a BCC phase. The crystallographic orientation of the transformed area was controlled by the orientation of the austenite grain and was consistent with either the Nishiyama–Wasserman or the Kurdjumov–Sachs orientation relationships. On the basis of the Xe+and Ga+ion beam exposures, the transformation is not controlled by the chemical stabilization of the BCC phase by the ion species, but is a result of the disorder caused by the ion-induced recoil motion and subsequent return of the disordered region to a more energetically favorable phase.