鐵-15鉻-5鎳-5錳合金差排特性分析

本文主要係利用光學顯微鏡(OM)、掃描式電子顯微鏡(SEM)、X光繞射儀(X-RD)與穿透式電子顯微鏡(TEM)等分析技術，針對鐵-15鉻-5鎳-5錳合金性質進行研究分析。主要研究結果顯示，其合金經高溫固溶後，顯微結構為單相沃斯田鐵(γ)，其晶格常數為a=0.365nm。此外，在穿透式電子顯微鏡檢查中可觀察到P type雙晶與Q type雙晶的產生，同時可觀察到(111)疊差(stacking full)，由於(111)疊差(stacking full)的存在，X-RD可觀察到(111)存在兩個峰值Δγ(111)=237，且顯示錳元素添加後疊差(stacking full)規則排列於(111)上，故合金在冷卻的過程中，因熱應力的影響下，在穿透式電子顯微鏡檢查中，而使原子間交互滑動而於(111)平面上產生疊差群。合金鑄件經由450℃-650℃時效熱處理後，在γ相基地內可觀察到麻田散鐵組織與(111)疊差(stacking full)的出現，其經格常數為a=0.365nm。

關鍵字

鐵-鉻-鎳合金；顯微結構；穿透式電子顯微鏡

並列摘要

The purposes of the studies are to investigate the effects of the 5 w.t.% Mn alloy element added on the microstructures of the 15-5PH stainless steel by using of the OM, SEM, XRD and TEM. Based on the present studies, the microstructure of the as-quenched specimens essentially a single austenite phase. In addition, some lamella structure was found on the austenite matrix. In the meanwhile, the microstructure of the present alloy is also an austenite phase during the 450-650℃ aged processes. Moreover, some stacking faults (similar to dislocation array) could be observed. According to the TEM examined, the foil normal of the stacking faults is (111).

並列關鍵字

Fe-Cr-Ni alloy ； Microstructure ； Transmission electron microscopy

參考文獻

13.H.R.Habibi Bajguirani，(2002)，「The effect of ageing upon themicrostructure and mechanical properties of type 15-5 Phstainless steel」，Mater.Sci. and Eng.，142-159。

14.P.Marshall，(1984)，「Austenitic Stainless Steels：Microstructure and Mechanical Properities」，32 。

參考文獻