利用HREM研究了9Ni钢中相邻马氏体（α）之间的取向关系和晶界结构。观察表明，同—马氏体束内两相邻马氏体片基本满足三种界面关系，即［0011］α1／／［1111］α2，（110）α1／／（110）α2关系和（110）α1与（110）α2夹角分别为5．3°与10．6°的小角晶界关系．马氏体间的界面为半共格的规则界面，由台阶和位错组成，本文利用已知的马氏体相交关系对它们进行了合理的解释
By means of HREM, the orientation relationships and the atomic structuresof boundary between adjacent two martensite lathes in 9Ni steel have been studied. Three orientation relationships, [001]α2 /[111]α2 /(110)α1 /(110)α2 and two low--angle grain boundaries of 5.3° and 10.6° between (110)α1 and (110)α2 The semicoherent grain botmdaries are composed of structural ledges and dislocations. It could be explained by using known martensite phase transformation relationships.
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