THE MORPHOLOGY, CRYSTALLOGRAPHY, AND CHEMISTRY OF PHASES IN AS-CAST NICKEL-ALUMINUM BRONZE
THE MORPHOLOGY, CRYSTALLOGRAPHY, AND CHEMISTRY OF PHASES IN AS-CAST NICKEL-ALUMINUM BRONZE
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DOI：
10.1007/bf02642870
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发表时间：
1982-01-01
期刊：
影响因子：
--
通讯作者：
RIDLEY, N
中科院分区：
文献类型：
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作者：
HASAN, F;JAHANAFROOZ, A;RIDLEY, N
采用光学、电子光学和微探针分析技术研究了名义成分为铜-10重量%铝-5重量%镍-5重量%铁的铸态镍铝青铜中存在的相的形态、晶体学和组成。铸态组织由富铜α相、马氏体β相和以Fe 3Al和NiAl为基体的κ相组成。κ z沉淀物具有树枝状形貌和核心;组成范围从富铁固溶体到Fe 3Al。κ II和κ IV沉淀分别具有树枝状和等轴/树枝状形态，并且基于Fe 3Al，而κ III是基于NiAl的片状或球状形态的共析分解产物。κI、κII和κ III沉淀物与α基体具有Kurdjumov-Sachs取向关系。小的κ IV沉淀物与α基体的取向关系为Nishiyama-Wasserman取向关系，而大的κ IV沉淀物与α基体的取向关系介于Kurdjumov-Sachs和Nishiyama-Wasserman之间。
The morphology, crystallography, and composition of the phases present in as-cast nickel-aluminum bronze of nominal composition copper-10 wt pct aluminum-5 wt pct nickel-5 wt pct iron have been investigated using optical, electron optical, and microprobe analysis techniques. The as-cast microstructure consists of copper-rich α, martensitic β, and κ-phases based on Fe3Al and NiAl. The κzprecipitates have a dendritic morphology and are cored; the composition ranges from iron-rich solid solution to Fe3Al. The κIIand κivprecipitates have, respectively, a dendritic and an equiaxed/dendritic morphology, and are based on Fe3Al, while κIIIis a eutectoidal decomposition product of lamellar or globular morphology based on NiAl. The κI, κII, and κIIIprecipitates have the Kurdjumov-Sachs orientation relationship with α matrix. Small κIVprecipitates exhibit the Nishiyama-Wasserman orientation relationship with the α matrix, while large κivprecipitates have an orientation relationship which lies between Kurdjumov-Sachs and Nishiyama-Wasserman.