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TB6鈦合金熱變形誘導馬氏體轉變
發(fā)布人：上海艾荔艾金屬材料有限公司www.bt990.com.cn
更新時間：2015-12-26
為研究TB6鈦合金在β相區(qū)熱變形后快冷過程中形變誘導馬氏體的轉變行為，采用圓柱試樣在Thermecmaster?Z型熱模擬試驗機上進行熱壓縮試驗，并計算β相條件下的穩(wěn)定系數，觀察熱變形組織，測試材料的物相結構。
TB6鈦合金熱變形誘導馬氏體轉變Transformation of deformation-induced martensite in TB6 titanium alloy
為研究TB6鈦合金在β相區(qū)熱變形后快冷過程中形變誘導馬氏體的轉變行為，采用圓柱試樣在Thermecmaster?Z型熱模擬試驗機上進行熱壓縮試驗，并計算β相條件下的穩(wěn)定系數，觀察熱變形組織，測試材料的物相結構。結果表明：合金β相條件穩(wěn)定下系數Kβ為1.06，β相處于機械不穩(wěn)定狀態(tài)，在β相區(qū)熱變形后快冷過程中合金存在形變誘導轉變斜方馬氏體(α″)，β相向斜方馬氏體轉變時3個點陣方向發(fā)生點陣應變?yōu)棣?/span>1=?7.1%，ε2=7.2%，ε3=1.1%的結果；形變誘導馬氏體呈現(xiàn)針狀和鋸齒狀兩種形貌，其轉變模式是先形成近似平行的細條狀或針狀主干，后從主干中不斷生長成樹枝狀，且馬氏體內部可能存在孿晶。
To study the transformation behavior of deformation-induced martensite in Ti-10Al-2Fe-3V(TB6) alloy during rapid cooling after β hot process，the hot compression experiments adopting cylindrical specimens at constant strain rates were carried out on Thermecmaster?Z simulator. The β stable coefficient (Kβ) of this alloy was calculated and the hot deformation microstructure was observed. The results show that the β stable coefficient (Kβ) is 1.06, the β-phase is of thermomechanical unstability, and the transformation of stress induced orthorhombic martensite from β-phase occurs by transformation strains in three principal lattice directions as ε1=?7.1%, ε2=+7.2%, ε3=+1.1% during rapid cooling after β hot process. The martensite which presents two typical morphologies of transition structure needle-type and serrate-type structure nucleates at pre-existing sub-grain boundaries and grows to laths parallelly.
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AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges.
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For more information on the alloys and services that we supply,?call us?at 086-021-67660801 or email us at [email protected]. You can also get in touch on social media, we are constantly active on?Weibo?and?Weixin.
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