【摘要】：利用光學(xué)顯微鏡(OM)、掃描電子顯微鏡(SEM)、X射線衍射儀(XRD)和拉伸力學(xué)試驗(yàn)等方法對(duì)鑄錠冶金Ti-45Al-7Nb-0.3W合金熱軋板材力學(xué)性能的各向異性進(jìn)行研究。結(jié)果表明:Ti-45Al-7Nb-0.3W合金熱軋板材具有明顯的力學(xué)性能各向異性,在室溫條件下,沿軋制方向的屈服強(qiáng)度σ_(RD)為445 MPa,高于沿橫向的屈服強(qiáng)度σ_(TD);在800℃條件下,σ_(RD)為522 MPa,低于σ_(TD)�？棙�(gòu)和顯微組織表明:經(jīng)熱軋變形后,板材中存在明顯{100}010立方織構(gòu),即面心四方γ晶胞的c軸平行于橫向;在軋制縱截面上,板材顯微組織表現(xiàn)為拉長的γ晶粒和α_2/γ層片晶團(tuán);在橫截面上,板材顯微組織表現(xiàn)為等軸的γ晶粒和α_2/γ層片晶團(tuán)。Ti-45Al-7Nb-0.3W合金熱軋板材力學(xué)性能的各向異性是由織構(gòu)和顯微組織的差異所致。
[Abstract]:The anisotropy of mechanical properties of hot rolled ingot metallurgical Ti-45Al-7Nb-0.3W alloy sheet was studied by means of optical microscope, (OM), scanning electron microscope, (SEM) X-ray diffractometer and tensile mechanical test. The results show that the yield strength 蟽 _ (RD) along the rolling direction is 445MPa, higher than the transverse yield strength 蟽 _ (TD); at 800 鈩，

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