Effects of Titanium Alloying Methods and Titanium Content on the Low Cycle Fatigue Behavior of A356 Alloys

Liu Zhongxia Song Mousheng Li Jiwen Weng Yonggang Wang Mingxing Song Tianfu

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Effects of Titanium Alloying Methods and Titanium Content on the Low Cycle Fatigue Behavior of A356 Alloys
Issue 9, Pages: 522-525(2005)
Published： 2005 ，
DOI：

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[1]刘忠侠,宋谋胜,李继文,翁永刚,王明星,宋天福.加钛方式及钛含量对A356合金的低周疲劳性能的影响[J].特种铸造及有色合金,2005(09):522-525+509.

Liu Zhongxia Song Mousheng Li Jiwen Weng Yonggang Wang Mingxing Song Tianfu. Effects of Titanium Alloying Methods and Titanium Content on the Low Cycle Fatigue Behavior of A356 Alloys. [J]. Special Casting & Nonferrous Alloys (9):522-525(2005)
[1]刘忠侠,宋谋胜,李继文,翁永刚,王明星,宋天福.加钛方式及钛含量对A356合金的低周疲劳性能的影响[J].特种铸造及有色合金,2005(09):522-525+509. DOI：

Liu Zhongxia Song Mousheng Li Jiwen Weng Yonggang Wang Mingxing Song Tianfu. Effects of Titanium Alloying Methods and Titanium Content on the Low Cycle Fatigue Behavior of A356 Alloys. [J]. Special Casting & Nonferrous Alloys (9):522-525(2005) DOI：

摘要

研究了不同加钛方式和钛含量对A356合金低周疲劳性能的影响

结果表明A356合金的循环硬化行为对合金的加钛方式和钛含量敏感。钛含量为0.14%的合金总是比钛含量为0.10%的合金具有更高的循环硬化率。在低应变时两种加钛方式的循环硬化行为类似

在高应变时电解加钛合金表现为类似“饱和”的准稳定形变状态

而熔配加钛合金表现为持续的循环硬化行为。疲劳寿命仅对含钛量敏感

钛含量为0.10%时合金的低周疲劳寿命要优于钛含量为0.14%的合金。但是加钛方式对疲劳寿命的影响很小

如果钛含量相近

则两种加钛方式合金的低周疲劳寿命差别不大。

Abstract

The effects of Ti alloying method and Ti content on the low cycle fatigue behaviors of A356 alloy were investigated.The results show that cycle-hardening behavior of A356 alloy was susceptive to both the Ti alloying method and Ti content

in which the alloy with （0.14%） Ti always has higher cyclic hardening rate than that of the alloys with 0.1% Ti.Both A356 alloy alloyed by electrolysis （EA356 alloys） and by melting Al-10Ti master alloys （MA356 alloys） exhibit the similar cyclic hardening behavior when tested at low strain amplitude

while tested at high strain amplitude

the EA356 alloys show the quasi-stable state that cyclic hardening ability approaches to saturation

and for the MA356 alloys

the cyclic hardening continuously proceeds.The low-cycle fatigue life of the alloy is only sensitive to the Ti content.Whether alloyed by electrolytic low-Ti alloys or Al-Ti master alloy

the alloy with 0.1% Ti always has higher low-cycle fatigue life than that of the alloy with 0.14% Ti.The EA356 alloys have the similar low-cycle fatigue life as the MA 356 alloys if two kinds of alloys have the same Ti content.