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鎳基單晶超合金中孔洞長(zhǎng)大的試驗(yàn)和有限元分析
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TG146.4

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Natural Science Foundation of China （50005016, 50375124）, Natural Science Foundation of Shaanxi Province and China aviation foundation （00B53010, 03B53003） as well as the Yangtze River foundation.


Experimental and Finite Element Study of Void Growth in Nickel-Base Single Crystal Superalloys
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    摘要:

    在高溫狀態(tài)下，鎳基單晶超合金的變形、損傷及斷裂分析中，孔洞的長(zhǎng)大都起著主要的作用。本研究進(jìn)行了系列的蠕變、疲勞及熱機(jī)械疲勞（TMF）試驗(yàn)。對(duì)試件的斷面進(jìn)行的SEM觀察表明，所有的斷面都是有許多小斷面構(gòu)成，在斷面的中心，至少有一個(gè)孔洞。孔洞的尺寸與加載的條件相關(guān)。使用晶體塑性有限元程序?qū)伟Ｐ瓦M(jìn)行分析，模擬孔洞的長(zhǎng)大規(guī)律。給出了蠕變和彈塑性兩種條件下的模擬結(jié)果及不同的晶體取向?qū)籽ㄩL(zhǎng)大的影響結(jié)果。對(duì)孔洞長(zhǎng)大的有限元分析有助于對(duì)實(shí)驗(yàn)結(jié)果的理解。

    Abstract:

    Void growth behavior plays an important role in the deformation, damage and rupture of the nickel-base single crystal superalloys at high temperature. A set of creep, fatigue and thermal-mechanical-fatigue (TMF) experiments was carried out. The SEM observation on the fractured surfaces shows that for all experiments studied in this paper the fracture surfaces are made up of small facets. In the center of the facet, there is at least one void. The dimension of the void is dependent on the loading conditions. Crystallographic finite element method was applied to simulate the void growth by a cell model. Creep loading condition and plastic loading condition were modeled. The influence of the crystallographic orientations on the void growth was studied. The finite element study of the void growth can help to understand the experimental results.

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王毅 岳珠峰 Stein M P.鎳基單晶超合金中孔洞長(zhǎng)大的試驗(yàn)和有限元分析[J].稀有金屬材料與工程,2006,35(1):39~42.[Wang Yi, Yue Zhufeng, Stein M P. Experimental and Finite Element Study of Void Growth in Nickel-Base Single Crystal Superalloys[J]. Rare Metal Materials and Engineering,2006,35(1):39~42.]
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  • 收稿日期:2004-05-22
  • 最后修改日期:2004-07-25
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