321/690异种金属焊接接头的腐蚀疲劳行为研究
Hot Working Technology（2019）
Abstract
采用1/2紧凑拉伸(compact tension,CT)试样,研究了690镍基合金与321不锈钢异种金属焊接接头在同一温度下含氧和除氧两种环境下的裂纹扩展行为,以及在相同含氧量的情况下应力强度因子对焊接接头的腐蚀疲劳裂纹扩展速率的影响规律.结果表明,含氧和除氧两种水环境中,裂纹扩展速率均随应力强度因子K的升高而升高,并且焊接接头在除氧环境中有较高的开裂敏感性.
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