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時效態C17200鈹銅合金的組織與性能
發布人：上海艾荔艾金屬材料有限公司www.jshcn.cn
更新時間：2015-08-19
采用X射線衍射(XRD)、透射電子顯微鏡(TEM)、高分辨電子顯微鏡(HRTEM)等分析手段研究C17200合金時效過程中微觀組織演變，測試不同時效工藝處理后合金的硬度和電導率等性能。
時效態C17200合金的組織與性能Microstructure and properties of aging C17200 alloy
采用X射線衍射(XRD)、透射電子顯微鏡(TEM)、高分辨電子顯微鏡(HRTEM)等分析手段研究C17200合金時效過程中微觀組織演變，測試不同時效工藝處理后合金的硬度和電導率等性能。結果表明：合金經320
℃時效1
h后，基體(200)主峰的左側出現比較明顯的低角度邊帶峰，即合金發生調幅分解，使得在基體的(100)面上形成圓盤狀結構的GP區。合金在時效過程中存在兩種析出方式：晶界不連續析出和晶內連續析出，且連續析出序列為α過飽和固溶體→GP區→γ′→γ。調幅分解和γ′相析出是C17200合金在時效過程中硬度升高并達到峰值的主要原因。
The microstructure evolution of C17200 alloy was studied
in the precipitation process by X-ray diffractometry, transmission electron
microscopy and high-resolution transmission electron microscopy. The hardness
and electrical conductivity of this alloy after various aging processes were
also tested. The results show that after the alloy was aged at 320 ℃ for 1 h,
low angle side-band peak is observed at the left side of (200) peak of the
matrix, and disk-like GP zones form on (100) planes of the matrix by spinodal
decomposition. Both discontinuous precipitation and continuous precipitation are
found in the aging process of the alloy and the precipitation sequence of the
continuous precipitation is α supersaturated solid solution→GP zones→γ′→γ.
Making the hardness increase and reach the peak value are mainly attributed to
spinodal decomposition and γ′ precipitation during the aging process.
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