CAJ | 학술논문

采用 X 射线衍射(XRD)、透射电子显微镜(TEM)、高分辨电子显微镜(HRTEM)等分析手段研究 C17200合金时效过程中微观组织演变，测试不同时效工艺处理后合金的硬度和电导率等性能。结果表明：合金经320℃时效1 h后，基体(200)主峰的左侧出现比较明显的低角度边带峰，即合金发生调幅分解，使得在基体的(100)面上形成圆盘状结构的GP区。合金在时效过程中存在两种析出方式：晶界不连续析出和晶内连续析出，且连续析出序列为α过饱和固溶体→GP区→γ′→γ。调幅分解和γ′相析出是C17200合金在时效过程中硬度升高并达到峰值的主要原因。
채용 X 사선연사(XRD)、투사전자현미경(TEM)、고분변전자현미경(HRTEM)등분석수단연구 C17200합금시효과정중미관조직연변，측시불동시효공예처리후합금적경도화전도솔등성능。결과표명：합금경320℃시효1 h후，기체(200)주봉적좌측출현비교명현적저각도변대봉，즉합금발생조폭분해，사득재기체적(100)면상형성원반상결구적GP구。합금재시효과정중존재량충석출방식：정계불련속석출화정내련속석출，차련속석출서렬위α과포화고용체→GP구→γ′→γ。조폭분해화γ′상석출시C17200합금재시효과정중경도승고병체도봉치적주요원인。
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 isαsupersaturated solid solution→GP zones→γ′→γ. Making the hardness increase and reach the peak value are mainly attributed to spinodal decomposition andγ′precipitation during the aging process.